sql公共类：
namespace Job.Common { public enum DataOption { Select = 0, Create, Update, Delete, Login } public sealed class SqlHelper { #region public ConnectionString private static string _defaultConnectionString; private static string _policyConnectionString; private static string _gjpolicyConnectionString; private static string _directConnectionString; private static string _gjdirect80ConnectionString; private static string _gj239ConnectionString; private static string _b2bwriteConnectionString; private static string _b2breadConnectionString; private static string _ttrelationwriteConnectionString; static private object _objectLock = new object(); public static string ConnectionString { get { if (_defaultConnectionString == null || _defaultConnectionString.Length == 0 || _defaultConnectionString == "") { lock (_objectLock) { //string sqlc = System.Configuration.ConfigurationManager.ConnectionStrings["sqlconnString"].ConnectionString; string sqlc = ConfigSetting.TTRelationWrite_18; if (sqlc != null && sqlc.Length > 0) _defaultConnectionString = sqlc; } } return _defaultConnectionString; } } /// <summary> /// TT18关联库 /// </summary> public static string TTRelationWriteConnectionString { get { if (String.IsNullOrEmpty(_ttrelationwriteConnectionString)) { _ttrelationwriteConnectionString = System.Configuration.ConfigurationManager.AppSettings["TTRelationWrite_18"]; } return _ttrelationwriteConnectionString; } } public static string PolicyConnectionString { get { if (String.IsNullOrEmpty(_policyConnectionString)) { _policyConnectionString = System.Configuration.ConfigurationManager.AppSettings["PolicyConnection"]; } return _policyConnectionString; } } public static string GJPolicyConnectionString { get { if (String.IsNullOrEmpty(_gjpolicyConnectionString)) { _gjpolicyConnectionString = System.Configuration.ConfigurationManager.AppSettings["PolicyRead_17"]; } return _gjpolicyConnectionString; } } public static string DirectConnectionString { get { if (String.IsNullOrEmpty(_directConnectionString)) { _directConnectionString = System.Configuration.ConfigurationManager.AppSettings["DirectWrite"]; } return _directConnectionString; } } public static string GJDirect80ConnectionString { get { if (String.IsNullOrEmpty(_gjdirect80ConnectionString)) { _gjdirect80ConnectionString = System.Configuration.ConfigurationManager.AppSettings["DirectWrite_80"]; } return _gjdirect80ConnectionString; } } public static string GJ234ConnectionString { get { if (String.IsNullOrEmpty(_gj239ConnectionString)) { _gj239ConnectionString = System.Configuration.ConfigurationManager.AppSettings["DirectPolicy_234"]; } return _gj239ConnectionString; } } public static string B2BWriteConnectionString { get { if (String.IsNullOrEmpty(_b2bwriteConnectionString)) { _b2bwriteConnectionString = System.Configuration.ConfigurationManager.AppSettings["B2BWrite_17"]; } return _b2bwriteConnectionString; } } public static string B2BReadConnectionString { get { if (String.IsNullOrEmpty(_b2breadConnectionString)) { _b2breadConnectionString = System.Configuration.ConfigurationManager.AppSettings["B2BRead_17"]; } return _b2breadConnectionString; } } #endregion #region private utility methods & constructors //Since this class provides only static methods, make the default constructor private to prevent //instances from being created with "new SqlHelper()". private SqlHelper() { } /// <summary> /// This method is used to attach array of SqlParameters to a SqlCommand. /// /// This method will assign a value of DbNull to any parameter with a direction of /// InputOutput and a value of null. /// /// This behavior will prevent default values from being used, but /// this will be the less common case than an intended pure output parameter (derived as InputOutput) /// where the user provided no input value. /// </summary> /// <param name="command">The command to which the parameters will be added</param> /// <param name="commandParameters">an array of SqlParameters tho be added to command</param> private static void AttachParameters(SqlCommand command, SqlParameter[] commandParameters) { foreach (SqlParameter p in commandParameters) { //check for derived output value with no value assigned if ((p.Direction == ParameterDirection.InputOutput || p.Direction == ParameterDirection.Input) && (p.Value == null)) { p.Value = DBNull.Value; } command.Parameters.Add(p); } } /// <summary> /// This method assigns an array of values to an array of SqlParameters. /// </summary> /// <param name="commandParameters">array of SqlParameters to be assigned values</param> /// <param name="parameterValues">array of objects holding the values to be assigned</param> private static void AssignParameterValues(SqlParameter[] commandParameters, object[] parameterValues) { if ((commandParameters == null) || (parameterValues == null)) { //do nothing if we get no data return; } // we must have the same number of values as we pave parameters to put them in if (commandParameters.Length != parameterValues.Length) { throw new ArgumentException("Parameter count does not match Parameter Value count."); } //iterate through the SqlParameters, assigning the values from the corresponding position in the //value array for (int i = 0, j = commandParameters.Length; i < j; i++) { commandParameters[i].Value = parameterValues[i]; } } /// <summary> /// This method opens (if necessary) and assigns a connection, transaction, command type and parameters /// to the provided command. /// </summary> /// <param name="command">the SqlCommand to be prepared</param> /// <param name="connection">a valid SqlConnection, on which to execute this command</param> /// <param name="transaction">a valid SqlTransaction, or 'null'</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParameters to be associated with the command or 'null' if no parameters are required</param> private static void PrepareCommand(SqlCommand command, SqlConnection connection, SqlTransaction transaction, CommandType commandType, string commandText, SqlParameter[] commandParameters) { //if the provided connection is not open, we will open it if (connection.State != ConnectionState.Open) { connection.Open(); } //associate the connection with the command command.Connection = connection; //set the command text (stored procedure name or SQL statement) command.CommandText = commandText; //if we were provided a transaction, assign it. if (transaction != null) { command.Transaction = transaction; } //set the command type command.CommandType = commandType; //attach the command parameters if they are provided if (commandParameters != null) { AttachParameters(command, commandParameters); } return; } #endregion private utility methods & constructors #region AddParameters public static object CheckForNullString(string text) { if (text == null || text.Trim().Length == 0) { return System.DBNull.Value; } else { return text; } } public static string CheckNull(object obj) { return (String)obj; } public static string CheckNull(DBNull obj) { return null; } public static SqlParameter MakeInParam(string ParamName, object Value) { return new SqlParameter(ParamName, Value); } /// <summary> /// Make input param. /// </summary> /// <param name="ParamName">Name of param.</param> /// <param name="DbType">Param type.</param> /// <param name="Size">Param size.</param> /// <param name="Value">Param value.</param> /// <returns>New parameter.</returns> public static SqlParameter MakeInParam(string ParamName, SqlDbType DbType, int Size, object Value) { return MakeParam(ParamName, DbType, Size, ParameterDirection.Input, Value); } /// <summary> /// Make input param. /// </summary> /// <param name="ParamName">Name of param.</param> /// <param name="DbType">Param type.</param> /// <param name="Size">Param size.</param> /// <returns>New parameter.</returns> public static SqlParameter MakeOutParam(string ParamName, SqlDbType DbType, int Size) { return MakeParam(ParamName, DbType, Size, ParameterDirection.Output, null); } /// <summary> /// Make stored procedure param. /// </summary> /// <param name="ParamName">Name of param.</param> /// <param name="DbType">Param type.</param> /// <param name="Size">Param size.</param> /// <param name="Direction">Parm direction.</param> /// <param name="Value">Param value.</param> /// <returns>New parameter.</returns> public static SqlParameter MakeParam(string ParamName, SqlDbType DbType, Int32 Size, ParameterDirection Direction, object Value) { SqlParameter param; if (Size > 0) param = new SqlParameter(ParamName, DbType, Size); else param = new SqlParameter(ParamName, DbType); param.Direction = Direction; if (!(Direction == ParameterDirection.Output && Value == null)) param.Value = Value; return param; } public static SqlParameter MakeParameter(string name, SqlDbType type, object value) { SqlParameter para = new SqlParameter(); para.ParameterName = "@" + name; para.SqlDbType = type; if (value == null) { para.SqlValue = DBNull.Value; } else { para.SqlValue = value; } return para; } public static SqlParameter MakeParameter(string name, SqlDbType type, int size, object value) { SqlParameter para = new SqlParameter(); para.ParameterName = "@" + name; para.SqlDbType = type; para.Size = size; if (value == null) { para.SqlValue = DBNull.Value; } else { para.SqlValue = value; } return para; } #endregion #region ExecuteNonQuery /// <summary> /// Execute a SqlCommand (that returns no resultset and takes no parameters) against the database specified in /// the connection string. /// </summary> /// <remarks> /// e.g.: /// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders"); /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>an int representing the number of rows affected by the command</returns> public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteNonQuery(connectionString, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns no resultset) against the database specified in the connection string /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24)); /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>an int representing the number of rows affected by the command</returns> public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //create & open a SqlConnection, and dispose of it after we are done. using (SqlConnection cn = new SqlConnection(connectionString)) { cn.Open(); //call the overload that takes a connection in place of the connection string return ExecuteNonQuery(cn, commandType, commandText, commandParameters); } } /// <summary> /// Execute a stored procedure via a SqlCommand (that returns no resultset) against the database specified in /// the connection string using the provided parameter values. This method will query the database to discover the parameters for the /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order. /// </summary> /// <remarks> /// This method provides no access to output parameters or the stored procedure's return value parameter. /// /// e.g.: /// int result = ExecuteNonQuery(connString, "PublishOrders", 24, 36); /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="spName">the name of the stored prcedure</param> /// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param> /// <returns>an int representing the number of rows affected by the command</returns> public static int ExecuteNonQuery(string connectionString, string spName, params object[] parameterValues) { //if we receive parameter values, we need to figure out where they go if ((parameterValues != null) && (parameterValues.Length > 0)) { SqlParameter[] commandParameters; if (parameterValues[0] is SqlParameter) { commandParameters = (SqlParameter[])parameterValues; } else { //pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache) commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName); //assign the provided values to these parameters based on parameter order AssignParameterValues(commandParameters, parameterValues); } //call the overload that takes an array of SqlParameters return ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName, commandParameters); } //otherwise we can just call the SP without params else { return ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName); } } /// <summary> /// Execute a SqlCommand (that returns no resultset and takes no parameters) against the provided SqlConnection. /// </summary> /// <remarks> /// e.g.: /// int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders"); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>an int representing the number of rows affected by the command</returns> public static int ExecuteNonQuery(SqlConnection connection, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteNonQuery(connection, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns no resultset) against the specified SqlConnection /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24)); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>an int representing the number of rows affected by the command</returns> public static int ExecuteNonQuery(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //create a command and prepare it for execution SqlCommand cmd = new SqlCommand(); PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters); //finally, execute the command. int retval = cmd.ExecuteNonQuery(); // detach the SqlParameters from the command object, so they can be used again. cmd.Parameters.Clear(); return retval; } /// <summary> /// Execute a stored procedure via a SqlCommand (that returns no resultset) against the specified SqlConnection /// using the provided parameter values. This method will query the database to discover the parameters for the /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order. /// </summary> /// <remarks> /// This method provides no access to output parameters or the stored procedure's return value parameter. /// /// e.g.: /// int result = ExecuteNonQuery(conn, "PublishOrders", 24, 36); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="spName">the name of the stored procedure</param> /// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param> /// <returns>an int representing the number of rows affected by the command</returns> public static int ExecuteNonQuery(SqlConnection connection, string spName, params object[] parameterValues) { //if we receive parameter values, we need to figure out where they go if ((parameterValues != null) && (parameterValues.Length > 0)) { //pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache) SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection.ConnectionString, spName); //assign the provided values to these parameters based on parameter order AssignParameterValues(commandParameters, parameterValues); //call the overload that takes an array of SqlParameters return ExecuteNonQuery(connection, CommandType.StoredProcedure, spName, commandParameters); } //otherwise we can just call the SP without params else { return ExecuteNonQuery(connection, CommandType.StoredProcedure, spName); } } /// <summary> /// Execute a SqlCommand (that returns no resultset and takes no parameters) against the provided SqlTransaction. /// </summary> /// <remarks> /// e.g.: /// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "PublishOrders"); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>an int representing the number of rows affected by the command</returns> public static int ExecuteNonQuery(SqlTransaction transaction, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteNonQuery(transaction, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns no resultset) against the specified SqlTransaction /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24)); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>an int representing the number of rows affected by the command</returns> public static int ExecuteNonQuery(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //create a command and prepare it for execution SqlCommand cmd = new SqlCommand(); PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters); //finally, execute the command. int retval = cmd.ExecuteNonQuery(); // detach the SqlParameters from the command object, so they can be used again. cmd.Parameters.Clear(); return retval; } /// <summary> /// Execute a stored procedure via a SqlCommand (that returns no resultset) against the specified /// SqlTransaction using the provided parameter values. This method will query the database to discover the parameters for the /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order. /// </summary> /// <remarks> /// This method provides no access to output parameters or the stored procedure's return value parameter. /// /// e.g.: /// int result = ExecuteNonQuery(conn, trans, "PublishOrders", 24, 36); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="spName">the name of the stored procedure</param> /// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param> /// <returns>an int representing the number of rows affected by the command</returns> public static int ExecuteNonQuery(SqlTransaction transaction, string spName, params object[] parameterValues) { //if we receive parameter values, we need to figure out where they go if ((parameterValues != null) && (parameterValues.Length > 0)) { //pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache) SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection.ConnectionString, spName); //assign the provided values to these parameters based on parameter order AssignParameterValues(commandParameters, parameterValues); //call the overload that takes an array of SqlParameters return ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName, commandParameters); } //otherwise we can just call the SP without params else { return ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName); } } #endregion ExecuteNonQuery #region ExecuteDataTable public static DataTable ExecuteDataTable(string connectionString, CommandType commandType, string commandText) { return ExecuteDataTable(connectionString, commandType, commandText, null); } public static DataTable ExecuteDataTable(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { DataTable dataTable; SqlConnection sqlConnection = new SqlConnection(connectionString); try { sqlConnection.Open(); dataTable = ExecuteDataTable(sqlConnection, commandType, commandText, commandParameters); } finally { if (sqlConnection != null) { sqlConnection.Dispose(); } } return dataTable; } public static DataTable ExecuteDataTable(SqlConnection connection, CommandType commandType, string commandText) { return ExecuteDataTable(connection, commandType, commandText, null); } public static DataTable ExecuteDataTable(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { SqlCommand sqlCommand = new SqlCommand(); PrepareCommand(sqlCommand, connection, null, commandType, commandText, commandParameters); SqlDataAdapter sqlDataAdapter = new SqlDataAdapter(sqlCommand); DataTable dataTable = new DataTable(); sqlDataAdapter.Fill(dataTable); sqlCommand.Parameters.Clear(); return dataTable; } public static DataTable ExecuteDataTable(SqlTransaction transaction, CommandType commandType, string commandText) { return ExecuteDataTable(transaction, commandType, commandText, null); } public static DataTable ExecuteDataTable(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { SqlCommand sqlCommand = new SqlCommand(); PrepareCommand(sqlCommand, transaction.Connection, transaction, commandType, commandText, commandParameters); SqlDataAdapter sqlDataAdapter = new SqlDataAdapter(sqlCommand); DataTable dataTable = new DataTable(); sqlDataAdapter.Fill(dataTable); sqlCommand.Parameters.Clear(); return dataTable; } #endregion #region ExecuteDataSet /// <summary> /// Execute a SqlCommand (that returns a resultset and takes no parameters) against the database specified in /// the connection string. /// </summary> /// <remarks> /// e.g.: /// DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders"); /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>a dataset containing the resultset generated by the command</returns> public static DataSet ExecuteDataset(string connectionString, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteDataset(connectionString, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns a resultset) against the database specified in the connection string /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24)); /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>a dataset containing the resultset generated by the command</returns> public static DataSet ExecuteDataset(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //create & open a SqlConnection, and dispose of it after we are done. using (SqlConnection cn = new SqlConnection(connectionString)) { if (cn.State == ConnectionState.Closed) cn.Open(); //call the overload that takes a connection in place of the connection string return ExecuteDataset(cn, commandType, commandText, commandParameters); } } /// <summary> /// Execute a stored procedure via a SqlCommand (that returns a resultset) against the database specified in /// the connection string using the provided parameter values. This method will query the database to discover the parameters for the /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order. /// </summary> /// <remarks> /// This method provides no access to output parameters or the stored procedure's return value parameter. /// /// e.g.: /// DataSet ds = ExecuteDataset(connString, "GetOrders", 24, 36); /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="spName">the name of the stored procedure</param> /// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param> /// <returns>a dataset containing the resultset generated by the command</returns> public static DataSet ExecuteDataset(string connectionString, string spName, params object[] parameterValues) { //if we receive parameter values, we need to figure out where they go if ((parameterValues != null) && (parameterValues.Length > 0)) { //pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache) SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName); //assign the provided values to these parameters based on parameter order AssignParameterValues(commandParameters, parameterValues); //call the overload that takes an array of SqlParameters return ExecuteDataset(connectionString, CommandType.StoredProcedure, spName, commandParameters); } //otherwise we can just call the SP without params else { return ExecuteDataset(connectionString, CommandType.StoredProcedure, spName); } } /// <summary> /// Execute a SqlCommand (that returns a resultset and takes no parameters) against the provided SqlConnection. /// </summary> /// <remarks> /// e.g.: /// DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders"); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>a dataset containing the resultset generated by the command</returns> public static DataSet ExecuteDataset(SqlConnection connection, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteDataset(connection, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns a resultset) against the specified SqlConnection /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24)); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>a dataset containing the resultset generated by the command</returns> public static DataSet ExecuteDataset(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //create a command and prepare it for execution SqlCommand cmd = new SqlCommand(); PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters); //create the DataAdapter & DataSet SqlDataAdapter da = new SqlDataAdapter(cmd); DataSet ds = new DataSet(); //fill the DataSet using default values for DataTable names, etc. da.Fill(ds); // detach the SqlParameters from the command object, so they can be used again. cmd.Parameters.Clear(); //return the dataset return ds; } /// <summary> /// Execute a stored procedure via a SqlCommand (that returns a resultset) against the specified SqlConnection /// using the provided parameter values. This method will query the database to discover the parameters for the /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order. /// </summary> /// <remarks> /// This method provides no access to output parameters or the stored procedure's return value parameter. /// /// e.g.: /// DataSet ds = ExecuteDataset(conn, "GetOrders", 24, 36); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="spName">the name of the stored procedure</param> /// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param> /// <returns>a dataset containing the resultset generated by the command</returns> public static DataSet ExecuteDataset(SqlConnection connection, string spName, params object[] parameterValues) { //if we receive parameter values, we need to figure out where they go if ((parameterValues != null) && (parameterValues.Length > 0)) { //pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache) SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection.ConnectionString, spName); //assign the provided values to these parameters based on parameter order AssignParameterValues(commandParameters, parameterValues); //call the overload that takes an array of SqlParameters return ExecuteDataset(connection, CommandType.StoredProcedure, spName, commandParameters); } //otherwise we can just call the SP without params else { return ExecuteDataset(connection, CommandType.StoredProcedure, spName); } } /// <summary> /// Execute a SqlCommand (that returns a resultset and takes no parameters) against the provided SqlTransaction. /// </summary> /// <remarks> /// e.g.: /// DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders"); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>a dataset containing the resultset generated by the command</returns> public static DataSet ExecuteDataset(SqlTransaction transaction, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteDataset(transaction, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns a resultset) against the specified SqlTransaction /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24)); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>a dataset containing the resultset generated by the command</returns> public static DataSet ExecuteDataset(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //create a command and prepare it for execution SqlCommand cmd = new SqlCommand(); PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters); //create the DataAdapter & DataSet SqlDataAdapter da = new SqlDataAdapter(cmd); DataSet ds = new DataSet(); //fill the DataSet using default values for DataTable names, etc. da.Fill(ds); // detach the SqlParameters from the command object, so they can be used again. cmd.Parameters.Clear(); //return the dataset return ds; } /// <summary> /// Execute a stored procedure via a SqlCommand (that returns a resultset) against the specified /// SqlTransaction using the provided parameter values. This method will query the database to discover the parameters for the /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order. /// </summary> /// <remarks> /// This method provides no access to output parameters or the stored procedure's return value parameter. /// /// e.g.: /// DataSet ds = ExecuteDataset(trans, "GetOrders", 24, 36); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="spName">the name of the stored procedure</param> /// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param> /// <returns>a dataset containing the resultset generated by the command</returns> public static DataSet ExecuteDataset(SqlTransaction transaction, string spName, params object[] parameterValues) { //if we receive parameter values, we need to figure out where they go if ((parameterValues != null) && (parameterValues.Length > 0)) { //pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache) SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection.ConnectionString, spName); //assign the provided values to these parameters based on parameter order AssignParameterValues(commandParameters, parameterValues); //call the overload that takes an array of SqlParameters return ExecuteDataset(transaction, CommandType.StoredProcedure, spName, commandParameters); } //otherwise we can just call the SP without params else { return ExecuteDataset(transaction, CommandType.StoredProcedure, spName); } } #endregion ExecuteDataSet #region ExecuteReader /// <summary> /// this enum is used to indicate whether the connection was provided by the caller, or created by SqlHelper, so that /// we can set the appropriate CommandBehavior when calling ExecuteReader() /// </summary> private enum SqlConnectionOwnership { /// <summary>Connection is owned and managed by SqlHelper</summary> Internal, /// <summary>Connection is owned and managed by the caller</summary> External } /// <summary> /// Create and prepare a SqlCommand, and call ExecuteReader with the appropriate CommandBehavior. /// </summary> /// <remarks> /// If we created and opened the connection, we want the connection to be closed when the DataReader is closed. /// /// If the caller provided the connection, we want to leave it to them to manage. /// </remarks> /// <param name="connection">a valid SqlConnection, on which to execute this command</param> /// <param name="transaction">a valid SqlTransaction, or 'null'</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParameters to be associated with the command or 'null' if no parameters are required</param> /// <param name="connectionOwnership">indicates whether the connection parameter was provided by the caller, or created by SqlHelper</param> /// <returns>SqlDataReader containing the results of the command</returns> private static SqlDataReader ExecuteReader(SqlConnection connection, SqlTransaction transaction, CommandType commandType, string commandText, SqlParameter[] commandParameters, SqlConnectionOwnership connectionOwnership) { //create a command and prepare it for execution SqlCommand cmd = new SqlCommand(); PrepareCommand(cmd, connection, transaction, commandType, commandText, commandParameters); //create a reader SqlDataReader dr; // call ExecuteReader with the appropriate CommandBehavior if (connectionOwnership == SqlConnectionOwnership.External) { dr = cmd.ExecuteReader(); } else { dr = cmd.ExecuteReader(CommandBehavior.CloseConnection); } // detach the SqlParameters from the command object, so they can be used again. cmd.Parameters.Clear(); return dr; } /// <summary> /// Execute a SqlCommand (that returns a resultset and takes no parameters) against the database specified in /// the connection string. /// </summary> /// <remarks> /// e.g.: /// SqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders"); /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>a SqlDataReader containing the resultset generated by the command</returns> public static SqlDataReader ExecuteReader(string connectionString, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteReader(connectionString, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns a resultset) against the database specified in the connection string /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// SqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24)); /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>a SqlDataReader containing the resultset generated by the command</returns> public static SqlDataReader ExecuteReader(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //create & open a SqlConnection SqlConnection cn = new SqlConnection(connectionString); cn.Open(); try { //call the private overload that takes an internally owned connection in place of the connection string return ExecuteReader(cn, null, commandType, commandText, commandParameters, SqlConnectionOwnership.Internal); } catch (Exception e) { //if we fail to return the SqlDatReader, we need to close the connection ourselves cn.Close(); throw; } } /// <summary> /// Execute a stored procedure via a SqlCommand (that returns a resultset) against the database specified in /// the connection string using the provided parameter values. This method will query the database to discover the parameters for the /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order. /// </summary> /// <remarks> /// This method provides no access to output parameters or the stored procedure's return value parameter. /// /// e.g.: /// SqlDataReader dr = ExecuteReader(connString, "GetOrders", 24, 36); /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="spName">the name of the stored procedure</param> /// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param> /// <returns>a SqlDataReader containing the resultset generated by the command</returns> public static SqlDataReader ExecuteReader(string connectionString, string spName, params object[] parameterValues) { //if we receive parameter values, we need to figure out where they go if ((parameterValues != null) && (parameterValues.Length > 0)) { //pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache) SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName); //assign the provided values to these parameters based on parameter order if (parameterValues[0].GetType() == typeof(SqlParameter)) { commandParameters = (SqlParameter[])parameterValues; } else { AssignParameterValues(commandParameters, parameterValues); } //call the overload that takes an array of SqlParameters return ExecuteReader(connectionString, CommandType.StoredProcedure, spName, commandParameters); } //otherwise we can just call the SP without params else { return ExecuteReader(connectionString, CommandType.StoredProcedure, spName); } } /// <summary> /// Execute a SqlCommand (that returns a resultset and takes no parameters) against the provided SqlConnection. /// </summary> /// <remarks> /// e.g.: /// SqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders"); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>a SqlDataReader containing the resultset generated by the command</returns> public static SqlDataReader ExecuteReader(SqlConnection connection, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteReader(connection, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns a resultset) against the specified SqlConnection /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// SqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24)); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>a SqlDataReader containing the resultset generated by the command</returns> public static SqlDataReader ExecuteReader(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //pass through the call to the private overload using a null transaction value and an externally owned connection return ExecuteReader(connection, (SqlTransaction)null, commandType, commandText, commandParameters, SqlConnectionOwnership.External); } /// <summary> /// Execute a stored procedure via a SqlCommand (that returns a resultset) against the specified SqlConnection /// using the provided parameter values. This method will query the database to discover the parameters for the /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order. /// </summary> /// <remarks> /// This method provides no access to output parameters or the stored procedure's return value parameter. /// /// e.g.: /// SqlDataReader dr = ExecuteReader(conn, "GetOrders", 24, 36); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="spName">the name of the stored procedure</param> /// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param> /// <returns>a SqlDataReader containing the resultset generated by the command</returns> public static SqlDataReader ExecuteReader(SqlConnection connection, string spName, params object[] parameterValues) { //if we receive parameter values, we need to figure out where they go if ((parameterValues != null) && (parameterValues.Length > 0)) { SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection.ConnectionString, spName); AssignParameterValues(commandParameters, parameterValues); return ExecuteReader(connection, CommandType.StoredProcedure, spName, commandParameters); } //otherwise we can just call the SP without params else { return ExecuteReader(connection, CommandType.StoredProcedure, spName); } } /// <summary> /// Execute a SqlCommand (that returns a resultset and takes no parameters) against the provided SqlTransaction. /// </summary> /// <remarks> /// e.g.: /// SqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders"); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>a SqlDataReader containing the resultset generated by the command</returns> public static SqlDataReader ExecuteReader(SqlTransaction transaction, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteReader(transaction, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns a resultset) against the specified SqlTransaction /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// SqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24)); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>a SqlDataReader containing the resultset generated by the command</returns> public static SqlDataReader ExecuteReader(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //pass through to private overload, indicating that the connection is owned by the caller return ExecuteReader(transaction.Connection, transaction, commandType, commandText, commandParameters, SqlConnectionOwnership.External); } /// <summary> /// Execute a stored procedure via a SqlCommand (that returns a resultset) against the specified /// SqlTransaction using the provided parameter values. This method will query the database to discover the parameters for the /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order. /// </summary> /// <remarks> /// This method provides no access to output parameters or the stored procedure's return value parameter. /// /// e.g.: /// SqlDataReader dr = ExecuteReader(trans, "GetOrders", 24, 36); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="spName">the name of the stored procedure</param> /// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param> /// <returns>a SqlDataReader containing the resultset generated by the command</returns> public static SqlDataReader ExecuteReader(SqlTransaction transaction, string spName, params object[] parameterValues) { //if we receive parameter values, we need to figure out where they go if ((parameterValues != null) && (parameterValues.Length > 0)) { SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection.ConnectionString, spName); AssignParameterValues(commandParameters, parameterValues); return ExecuteReader(transaction, CommandType.StoredProcedure, spName, commandParameters); } //otherwise we can just call the SP without params else { return ExecuteReader(transaction, CommandType.StoredProcedure, spName); } } #endregion ExecuteReader #region ExecuteScalar /// <summary> /// Execute a SqlCommand (that returns a 1x1 resultset and takes no parameters) against the database specified in /// the connection string. /// </summary> /// <remarks> /// e.g.: /// int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount"); /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>an object containing the value in the 1x1 resultset generated by the command</returns> public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteScalar(connectionString, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns a 1x1 resultset) against the database specified in the connection string /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24)); /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>an object containing the value in the 1x1 resultset generated by the command</returns> public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //create & open a SqlConnection, and dispose of it after we are done. using (SqlConnection cn = new SqlConnection(connectionString)) { cn.Open(); //call the overload that takes a connection in place of the connection string return ExecuteScalar(cn, commandType, commandText, commandParameters); } } /// <summary> /// Execute a stored procedure via a SqlCommand (that returns a 1x1 resultset) against the database specified in /// the connection string using the provided parameter values. This method will query the database to discover the parameters for the /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order. /// </summary> /// <remarks> /// This method provides no access to output parameters or the stored procedure's return value parameter. /// /// e.g.: /// int orderCount = (int)ExecuteScalar(connString, "GetOrderCount", 24, 36); /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="spName">the name of the stored procedure</param> /// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param> /// <returns>an object containing the value in the 1x1 resultset generated by the command</returns> public static object ExecuteScalar(string connectionString, string spName, params object[] parameterValues) { //if we receive parameter values, we need to figure out where they go if ((parameterValues != null) && (parameterValues.Length > 0)) { //pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache) SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName); //assign the provided values to these parameters based on parameter order AssignParameterValues(commandParameters, parameterValues); //call the overload that takes an array of SqlParameters return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName, commandParameters); } //otherwise we can just call the SP without params else { return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName); } } /// <summary> /// Execute a SqlCommand (that returns a 1x1 resultset and takes no parameters) against the provided SqlConnection. /// </summary> /// <remarks> /// e.g.: /// int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount"); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>an object containing the value in the 1x1 resultset generated by the command</returns> public static object ExecuteScalar(SqlConnection connection, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteScalar(connection, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns a 1x1 resultset) against the specified SqlConnection /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24)); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>an object containing the value in the 1x1 resultset generated by the command</returns> public static object ExecuteScalar(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //create a command and prepare it for execution SqlCommand cmd = new SqlCommand(); PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters); //execute the command & return the results object retval = cmd.ExecuteScalar(); // detach the SqlParameters from the command object, so they can be used again. cmd.Parameters.Clear(); return retval; } /// <summary> /// Execute a stored procedure via a SqlCommand (that returns a 1x1 resultset) against the specified SqlConnection /// using the provided parameter values. This method will query the database to discover the parameters for the /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order. /// </summary> /// <remarks> /// This method provides no access to output parameters or the stored procedure's return value parameter. /// /// e.g.: /// int orderCount = (int)ExecuteScalar(conn, "GetOrderCount", 24, 36); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="spName">the name of the stored procedure</param> /// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param> /// <returns>an object containing the value in the 1x1 resultset generated by the command</returns> public static object ExecuteScalar(SqlConnection connection, string spName, params object[] parameterValues) { //if we receive parameter values, we need to figure out where they go if ((parameterValues != null) && (parameterValues.Length > 0)) { //pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache) SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection.ConnectionString, spName); //assign the provided values to these parameters based on parameter order AssignParameterValues(commandParameters, parameterValues); //call the overload that takes an array of SqlParameters return ExecuteScalar(connection, CommandType.StoredProcedure, spName, commandParameters); } //otherwise we can just call the SP without params else { return ExecuteScalar(connection, CommandType.StoredProcedure, spName); } } /// <summary> /// Execute a SqlCommand (that returns a 1x1 resultset and takes no parameters) against the provided SqlTransaction. /// </summary> /// <remarks> /// e.g.: /// int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount"); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>an object containing the value in the 1x1 resultset generated by the command</returns> public static object ExecuteScalar(SqlTransaction transaction, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteScalar(transaction, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns a 1x1 resultset) against the specified SqlTransaction /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24)); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>an object containing the value in the 1x1 resultset generated by the command</returns> public static object ExecuteScalar(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //create a command and prepare it for execution SqlCommand cmd = new SqlCommand(); PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters); //execute the command & return the results object retval = cmd.ExecuteScalar(); // detach the SqlParameters from the command object, so they can be used again. cmd.Parameters.Clear(); return retval; } /// <summary> /// Execute a stored procedure via a SqlCommand (that returns a 1x1 resultset) against the specified /// SqlTransaction using the provided parameter values. This method will query the database to discover the parameters for the /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order. /// </summary> /// <remarks> /// This method provides no access to output parameters or the stored procedure's return value parameter. /// /// e.g.: /// int orderCount = (int)ExecuteScalar(trans, "GetOrderCount", 24, 36); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="spName">the name of the stored procedure</param> /// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param> /// <returns>an object containing the value in the 1x1 resultset generated by the command</returns> public static object ExecuteScalar(SqlTransaction transaction, string spName, params object[] parameterValues) { //if we receive parameter values, we need to figure out where they go if ((parameterValues != null) && (parameterValues.Length > 0)) { //pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache) SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection.ConnectionString, spName); //assign the provided values to these parameters based on parameter order AssignParameterValues(commandParameters, parameterValues); //call the overload that takes an array of SqlParameters return ExecuteScalar(transaction, CommandType.StoredProcedure, spName, commandParameters); } //otherwise we can just call the SP without params else { return ExecuteScalar(transaction, CommandType.StoredProcedure, spName); } } #endregion ExecuteScalar #region ExecuteXmlReader /// <summary> /// Execute a SqlCommand (that returns a resultset and takes no parameters) against the provided SqlConnection. /// </summary> /// <remarks> /// e.g.: /// XmlReader r = ExecuteXmlReader(conn, CommandType.StoredProcedure, "GetOrders"); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command using "FOR XML AUTO"</param> /// <returns>an XmlReader containing the resultset generated by the command</returns> public static XmlReader ExecuteXmlReader(SqlConnection connection, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteXmlReader(connection, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns a resultset) against the specified SqlConnection /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// XmlReader r = ExecuteXmlReader(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24)); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command using "FOR XML AUTO"</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>an XmlReader containing the resultset generated by the command</returns> public static XmlReader ExecuteXmlReader(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //create a command and prepare it for execution SqlCommand cmd = new SqlCommand(); PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters); //create the DataAdapter & DataSet XmlReader retval = cmd.ExecuteXmlReader(); // detach the SqlParameters from the command object, so they can be used again. cmd.Parameters.Clear(); return retval; } /// <summary> /// Execute a stored procedure via a SqlCommand (that returns a resultset) against the specified SqlConnection /// using the provided parameter values. This method will query the database to discover the parameters for the /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order. /// </summary> /// <remarks> /// This method provides no access to output parameters or the stored procedure's return value parameter. /// /// e.g.: /// XmlReader r = ExecuteXmlReader(conn, "GetOrders", 24, 36); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="spName">the name of the stored procedure using "FOR XML AUTO"</param> /// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param> /// <returns>an XmlReader containing the resultset generated by the command</returns> public static XmlReader ExecuteXmlReader(SqlConnection connection, string spName, params object[] parameterValues) { //if we receive parameter values, we need to figure out where they go if ((parameterValues != null) && (parameterValues.Length > 0)) { //pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache) SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection.ConnectionString, spName); //assign the provided values to these parameters based on parameter order AssignParameterValues(commandParameters, parameterValues); //call the overload that takes an array of SqlParameters return ExecuteXmlReader(connection, CommandType.StoredProcedure, spName, commandParameters); } //otherwise we can just call the SP without params else { return ExecuteXmlReader(connection, CommandType.StoredProcedure, spName); } } /// <summary> /// Execute a SqlCommand (that returns a resultset and takes no parameters) against the provided SqlTransaction. /// </summary> /// <remarks> /// e.g.: /// XmlReader r = ExecuteXmlReader(trans, CommandType.StoredProcedure, "GetOrders"); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command using "FOR XML AUTO"</param> /// <returns>an XmlReader containing the resultset generated by the command</returns> public static XmlReader ExecuteXmlReader(SqlTransaction transaction, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteXmlReader(transaction, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns a resultset) against the specified SqlTransaction /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// XmlReader r = ExecuteXmlReader(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24)); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command using "FOR XML AUTO"</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>an XmlReader containing the resultset generated by the command</returns> public static XmlReader ExecuteXmlReader(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //create a command and prepare it for execution SqlCommand cmd = new SqlCommand(); PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters); //create the DataAdapter & DataSet XmlReader retval = cmd.ExecuteXmlReader(); // detach the SqlParameters from the command object, so they can be used again. cmd.Parameters.Clear(); return retval; } /// <summary> /// Execute a stored procedure via a SqlCommand (that returns a resultset) against the specified /// SqlTransaction using the provided parameter values. This method will query the database to discover the parameters for the /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order. /// </summary> /// <remarks> /// This method provides no access to output parameters or the stored procedure's return value parameter. /// /// e.g.: /// XmlReader r = ExecuteXmlReader(trans, "GetOrders", 24, 36); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="spName">the name of the stored procedure</param> /// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param> /// <returns>a dataset containing the resultset generated by the command</returns> public static XmlReader ExecuteXmlReader(SqlTransaction transaction, string spName, params object[] parameterValues) { //if we receive parameter values, we need to figure out where they go if ((parameterValues != null) && (parameterValues.Length > 0)) { //pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache) SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection.ConnectionString, spName); //assign the provided values to these parameters based on parameter order AssignParameterValues(commandParameters, parameterValues); //call the overload that takes an array of SqlParameters return ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName, commandParameters); } //otherwise we can just call the SP without params else { return ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName); } } #endregion ExecuteXmlReader //public static SqlParameter MakeInParam(string name, SqlDbType type, int size, object value) //{ // SqlParameter para = new SqlParameter(); // para.ParameterName = "@" + name; // para.SqlDbType = type; // para.Size = size; // para.Direction = ParameterDirection.Input; // para.Value = value; // return para; //} public static SqlParameter MakeInParam(string name, SqlDbType type, object value) { SqlParameter para = new SqlParameter(); para.ParameterName = "@" + name; para.SqlDbType = type; para.Direction = ParameterDirection.Input; para.Value = value; return para; } /// <summary> /// 大批量插入数据(2000每批次) /// 已采用整体事物控制 /// </summary> /// <param name="connString">数据库链接字符串</param> /// <param name="tableName">数据库服务器上目标表名</param> /// <param name="dt">含有和目标数据库表结构完全一致(所包含的字段名完全一致即可)的DataTable</param> public static void BulkCopy(SqlConnection conn, string tableName, DataTable dt, int BatchSize) { if (conn.State != ConnectionState.Open) conn.Open(); using (SqlTransaction transaction = conn.BeginTransaction()) { using (SqlBulkCopy bulkCopy = new SqlBulkCopy(conn, SqlBulkCopyOptions.Default, transaction)) { bulkCopy.BatchSize = BatchSize; bulkCopy.BulkCopyTimeout = 60; bulkCopy.DestinationTableName = tableName; try { foreach (DataColumn col in dt.Columns) { bulkCopy.ColumnMappings.Add(col.ColumnName, col.ColumnName); } bulkCopy.WriteToServer(dt); transaction.Commit(); } catch (Exception ex) { transaction.Rollback(); throw ex; } } } } /// <summary> /// 大批量插入数据(2000每批次) /// 已采用整体事物控制 /// </summary> /// <param name="connString">数据库链接字符串</param> /// <param name="tableName">数据库服务器上目标表名</param> /// <param name="dt">含有和目标数据库表结构完全一致(所包含的字段名完全一致即可)的DataTable</param> public static void BulkCopy(SqlConnection conn, string tableName, DataRow[] drs, int BatchSize) { if (conn.State != ConnectionState.Open) conn.Open(); using (SqlTransaction transaction = conn.BeginTransaction()) { using (SqlBulkCopy bulkCopy = new SqlBulkCopy(conn, SqlBulkCopyOptions.Default, transaction)) { bulkCopy.BatchSize = BatchSize; bulkCopy.BulkCopyTimeout = 60; bulkCopy.DestinationTableName = tableName; try { foreach (DataColumn col in drs[0].Table.Columns) { bulkCopy.ColumnMappings.Add(col.ColumnName, col.ColumnName); } bulkCopy.WriteToServer(drs); transaction.Commit(); } catch (Exception ex) { transaction.Rollback(); throw ex; } } } } } public sealed class SqlHelperParameterCache { #region private methods, variables, and constructors //Since this class provides only static methods, make the default constructor private to prevent //instances from being created with "new SqlHelperParameterCache()". private SqlHelperParameterCache() { } private static Hashtable paramCache = Hashtable.Synchronized(new Hashtable()); /// <summary> /// resolve at run time the appropriate set of SqlParameters for a stored procedure /// </summary> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="spName">the name of the stored procedure</param> /// <param name="includeReturnValueParameter">whether or not to include their return value parameter</param> /// <returns></returns> private static SqlParameter[] DiscoverSpParameterSet(string connectionString, string spName, bool includeReturnValueParameter) { using (SqlConnection cn = new SqlConnection(connectionString)) using (SqlCommand cmd = new SqlCommand(spName, cn)) { cn.Open(); cmd.CommandType = CommandType.StoredProcedure; SqlCommandBuilder.DeriveParameters(cmd); if (!includeReturnValueParameter) { cmd.Parameters.RemoveAt(0); } SqlParameter[] discoveredParameters = new SqlParameter[cmd.Parameters.Count]; ; cmd.Parameters.CopyTo(discoveredParameters, 0); return discoveredParameters; } } //deep copy of cached SqlParameter array private static SqlParameter[] CloneParameters(SqlParameter[] originalParameters) { SqlParameter[] clonedParameters = new SqlParameter[originalParameters.Length]; for (int i = 0, j = originalParameters.Length; i < j; i++) { clonedParameters[i] = (SqlParameter)((ICloneable)originalParameters[i]).Clone(); } return clonedParameters; } #endregion private methods, variables, and constructors #region caching functions /// <summary> /// add parameter array to the cache /// </summary> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters to be cached</param> public static void CacheParameterSet(string connectionString, string commandText, params SqlParameter[] commandParameters) { string hashKey = connectionString + ":" + commandText; paramCache[hashKey] = commandParameters; } /// <summary> /// retrieve a parameter array from the cache /// </summary> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>an array of SqlParamters</returns> public static SqlParameter[] GetCachedParameterSet(string connectionString, string commandText) { string hashKey = connectionString + ":" + commandText; SqlParameter[] cachedParameters = (SqlParameter[])paramCache[hashKey]; if (cachedParameters == null) { return null; } else { return CloneParameters(cachedParameters); } } #endregion caching functions #region Parameter Discovery Functions /// <summary> /// Retrieves the set of SqlParameters appropriate for the stored procedure /// </summary> /// <remarks> /// This method will query the database for this information, and then store it in a cache for future requests. /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="spName">the name of the stored procedure</param> /// <returns>an array of SqlParameters</returns> public static SqlParameter[] GetSpParameterSet(string connectionString, string spName) { return GetSpParameterSet(connectionString, spName, false); } /// <summary> /// Retrieves the set of SqlParameters appropriate for the stored procedure /// </summary> /// <remarks> /// This method will query the database for this information, and then store it in a cache for future requests. /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="spName">the name of the stored procedure</param> /// <param name="includeReturnValueParameter">a bool value indicating whether the return value parameter should be included in the results</param> /// <returns>an array of SqlParameters</returns> public static SqlParameter[] GetSpParameterSet(string connectionString, string spName, bool includeReturnValueParameter) { string hashKey = connectionString + ":" + spName + (includeReturnValueParameter ? ":include ReturnValue Parameter" : ""); SqlParameter[] cachedParameters; cachedParameters = (SqlParameter[])paramCache[hashKey]; if (cachedParameters == null) { cachedParameters = (SqlParameter[])(paramCache[hashKey] = DiscoverSpParameterSet(connectionString, spName, includeReturnValueParameter)); } return CloneParameters(cachedParameters); } #endregion Parameter Discovery Functions } }
事务入库：
public string CreateOrderInf() { using (SqlConnection con = new SqlConnection(ConfigSetting.B2BWrite)) { con.Open(); using (SqlCommand cmd = con.CreateCommand()) { SqlTransaction transaction = con.BeginTransaction("SampleTransaction"); //开始事务 cmd.Connection = con; cmd.Transaction = transaction; try { //cmd.CommandText = sqldel; //int intdel = cmd.ExecuteNonQuery(); //cmd.CommandText = sqladd; //int intaddd = cmd.ExecuteNonQuery(); //cmd.CommandText = sqldeltemp; //int intdeltemp = cmd.ExecuteNonQuery(); //logclass.Info(string.Format("删除原有记录：{0}，新增：{1}，删除临时：{2}", intdel, intaddd, intdeltemp)); transaction.Commit(); //事务完成之后提交事务 } catch (Exception ex) { logclass.Error(string.Format("更新出错：{0}", ex.Message)); transaction.Rollback(); //如果事务没有完成，就回滚事务 } } } return ""; }
