SQLHelper

using System; using System.Data; using System.Data.SqlClient; using System.Configuration; using System.ComponentModel; namespace SQLHelper { /// <summary> /// SQLHelper类封装对SQL Server数据库的添加、删除、修改和选择等操作 /// </summary> public class SQLHelper { /// 连接数据源 private SqlConnection myConnection = null; private readonly string RETURNVALUE = "RETURNVALUE"; /// <summary> /// 打开数据库连接. /// </summary> private void Open() { // 打开数据库连接 if (myConnection == null) { myConnection = new SqlConnection(ConfigurationManager.AppSettings["sifucoConnStr"].ToString()); } if (myConnection.State == ConnectionState.Closed) { try { ///打开数据库连接 myConnection.Open(); } catch (Exception ex) { SystemError.CreateErrorLog(ex.Message); } finally { ///关闭已经打开的数据库连接 } } } /// <summary> /// 关闭数据库连接 /// </summary> public void Close() { ///判断连接是否已经创建 if (myConnection != null) { ///判断连接的状态是否打开 if (myConnection.State == ConnectionState.Open) { myConnection.Close(); } } } /// <summary> /// 释放资源 /// </summary> public void Dispose() { // 确认连接是否已经关闭 if (myConnection != null) { myConnection.Dispose(); myConnection = null; } } /// <summary> /// 执行存储过程 /// </summary> /// <param name="procName">存储过程的名称</param> /// <returns>返回存储过程返回值</returns> public int RunProc(string procName) { SqlCommand cmd = CreateProcCommand(procName, null); try { ///执行存储过程 cmd.ExecuteNonQuery(); } catch (Exception ex) { ///记录错误日志 SystemError.CreateErrorLog(ex.Message); } finally { ///关闭数据库的连接 Close(); } ///返回存储过程的参数值 return (int)cmd.Parameters[RETURNVALUE].Value; } /// <summary> /// 执行存储过程 /// </summary> /// <param name="procName">存储过程名称</param> /// <param name="prams">存储过程所需参数</param> /// <returns>返回存储过程返回值</returns> public int RunProc(string procName, SqlParameter[] prams) { SqlCommand cmd = CreateProcCommand(procName, prams); try { ///执行存储过程 cmd.ExecuteNonQuery(); } catch (Exception ex) { ///记录错误日志 SystemError.CreateErrorLog(ex.Message); } finally { ///关闭数据库的连接 Close(); } ///返回存储过程的参数值 return (int)cmd.Parameters[RETURNVALUE].Value; } /// <summary> /// 执行存储过程 /// </summary> /// <param name="procName">存储过程的名称</param> /// <param name="dataReader">返回存储过程返回值</param> public void RunProc(string procName, out SqlDataReader dataReader) { ///创建Command SqlCommand cmd = CreateProcCommand(procName, null); try { ///读取数据 dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection); } catch (Exception ex) { dataReader = null; ///记录错误日志 SystemError.CreateErrorLog(ex.Message); } } /// <summary> /// 执行存储过程 /// </summary> /// <param name="procName">存储过程的名称</param> /// <param name="prams">存储过程所需参数</param> /// <param name="dataSet">返回DataReader对象</param> public void RunProc(string procName, SqlParameter[] prams, out SqlDataReader dataReader) { ///创建Command SqlCommand cmd = CreateProcCommand(procName, prams); try { ///读取数据 dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection); } catch (Exception ex) { dataReader = null; ///记录错误日志 SystemError.CreateErrorLog(ex.Message); } } /// <summary> /// 执行存储过程 /// </summary> /// <param name="procName">存储过程的名称</param> /// <param name="dataSet">返回DataSet对象</param> public void RunProc(string procName, ref DataSet dataSet) { if (dataSet == null) { dataSet = new DataSet(); } ///创建SqlDataAdapter SqlDataAdapter da = CreateProcDataAdapter(procName, null); try { ///读取数据 da.Fill(dataSet); } catch (Exception ex) { ///记录错误日志 SystemError.CreateErrorLog(ex.Message); } finally { ///关闭数据库的连接 Close(); } } /// <summary> /// 执行存储过程 /// </summary> /// <param name="procName">存储过程的名称</param> /// <param name="prams">存储过程所需参数</param> /// <param name="dataSet">返回DataSet对象</param> public void RunProc(string procName, SqlParameter[] prams, ref DataSet dataSet) { if (dataSet == null) { dataSet = new DataSet(); } ///创建SqlDataAdapter SqlDataAdapter da = CreateProcDataAdapter(procName, prams); try { ///读取数据 da.Fill(dataSet); } catch (Exception ex) { ///记录错误日志 SystemError.CreateErrorLog(ex.Message); } finally { ///关闭数据库的连接 Close(); } } /// <summary> /// 执行SQL语句 /// </summary> /// <param name="cmdText">SQL语句</param> /// <returns>返回值</returns> public int RunSQL(string cmdText) { SqlCommand cmd = CreateSQLCommand(cmdText, null); try { ///执行存储过程 cmd.ExecuteNonQuery(); } catch (Exception ex) { ///记录错误日志 SystemError.CreateErrorLog(ex.Message); } finally { ///关闭数据库的连接 Close(); } ///返回存储过程的参数值 return (int)cmd.Parameters[RETURNVALUE].Value; } /// <summary> /// 执行SQL语句 /// </summary> /// <param name="cmdText">SQL语句</param> /// <param name="prams">SQL语句所需参数</param> /// <returns>返回值</returns> public int RunSQL(string cmdText, SqlParameter[] prams) { SqlCommand cmd = CreateSQLCommand(cmdText, prams); try { ///执行存储过程 cmd.ExecuteNonQuery(); } catch (Exception ex) { ///记录错误日志 SystemError.CreateErrorLog(ex.Message); } finally { ///关闭数据库的连接 Close(); } ///返回存储过程的参数值 return (int)cmd.Parameters[RETURNVALUE].Value; } /// <summary> /// 执行SQL语句 /// </summary> /// <param name="cmdText">SQL语句</param> /// <param name="dataReader">返回DataReader对象</param> public void RunSQL(string cmdText, out SqlDataReader dataReader) { ///创建Command SqlCommand cmd = CreateSQLCommand(cmdText, null); try { ///读取数据 dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection); } catch (Exception ex) { dataReader = null; ///记录错误日志 SystemError.CreateErrorLog(ex.Message); } } /// <summary> /// 执行SQL语句 /// </summary> /// <param name="cmdText">SQL语句</param> /// <param name="prams">SQL语句所需参数</param> /// <param name="dataReader">返回DataReader对象</param> public void RunSQL(string cmdText, SqlParameter[] prams, out SqlDataReader dataReader) { ///创建Command SqlCommand cmd = CreateSQLCommand(cmdText, prams); try { ///读取数据 dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection); } catch (Exception ex) { dataReader = null; ///记录错误日志 SystemError.CreateErrorLog(ex.Message); } } /// <summary> /// 执行SQL语句 /// </summary> /// <param name="cmdText">SQL语句</param> /// <param name="dataSet">返回DataSet对象</param> public void RunSQL(string cmdText, ref DataSet dataSet) { if (dataSet == null) { dataSet = new DataSet(); } ///创建SqlDataAdapter SqlDataAdapter da = CreateSQLDataAdapter(cmdText, null); try { ///读取数据 da.Fill(dataSet); } catch (Exception ex) { ///记录错误日志 SystemError.CreateErrorLog(ex.Message); } finally { ///关闭数据库的连接 Close(); } } /// <summary> /// 执行SQL语句 /// </summary> /// <param name="cmdText">SQL语句</param> /// <param name="prams">SQL语句所需参数</param> /// <param name="dataSet">返回DataSet对象</param> public void RunSQL(string cmdText, SqlParameter[] prams, ref DataSet dataSet) { if (dataSet == null) { dataSet = new DataSet(); } ///创建SqlDataAdapter SqlDataAdapter da = CreateProcDataAdapter(cmdText, prams); try { ///读取数据 da.Fill(dataSet); } catch (Exception ex) { ///记录错误日志 SystemError.CreateErrorLog(ex.Message); } finally { ///关闭数据库的连接 Close(); } } /// <summary> /// 创建一个SqlCommand对象以此来执行存储过程 /// </summary> /// <param name="procName">存储过程的名称</param> /// <param name="prams">存储过程所需参数</param> /// <returns>返回SqlCommand对象</returns> private SqlCommand CreateProcCommand(string procName, SqlParameter[] prams) { ///打开数据库连接 Open(); ///设置Command SqlCommand cmd = new SqlCommand(procName, myConnection); cmd.CommandType = CommandType.StoredProcedure; ///添加把存储过程的参数 if (prams != null) { foreach (SqlParameter parameter in prams) { cmd.Parameters.Add(parameter); } } ///添加返回参数ReturnValue cmd.Parameters.Add( new SqlParameter(RETURNVALUE, SqlDbType.Int, 4, ParameterDirection.ReturnValue, false, 0, 0, string.Empty, DataRowVersion.Default, null)); ///返回创建的SqlCommand对象 return cmd; } /// <summary> /// 创建一个SqlCommand对象以此来执行存储过程 /// </summary> /// <param name="cmdText">SQL语句</param> /// <param name="prams">SQL语句所需参数</param> /// <returns>返回SqlCommand对象</returns> private SqlCommand CreateSQLCommand(string cmdText, SqlParameter[] prams) { ///打开数据库连接 Open(); ///设置Command SqlCommand cmd = new SqlCommand(cmdText, myConnection); ///添加把存储过程的参数 if (prams != null) { foreach (SqlParameter parameter in prams) { cmd.Parameters.Add(parameter); } } ///添加返回参数ReturnValue cmd.Parameters.Add( new SqlParameter(RETURNVALUE, SqlDbType.Int, 4, ParameterDirection.ReturnValue, false, 0, 0, string.Empty, DataRowVersion.Default, null)); ///返回创建的SqlCommand对象 return cmd; } /// <summary> /// 创建一个SqlDataAdapter对象，用此来执行存储过程 /// </summary> /// <param name="procName">存储过程的名称</param> /// <param name="prams">存储过程所需参数</param> /// <returns>返回SqlDataAdapter对象</returns> private SqlDataAdapter CreateProcDataAdapter(string procName, SqlParameter[] prams) { ///打开数据库连接 Open(); ///设置SqlDataAdapter对象 SqlDataAdapter da = new SqlDataAdapter(procName, myConnection); da.SelectCommand.CommandType = CommandType.StoredProcedure; ///添加把存储过程的参数 if (prams != null) { foreach (SqlParameter parameter in prams) { da.SelectCommand.Parameters.Add(parameter); } } ///添加返回参数ReturnValue da.SelectCommand.Parameters.Add( new SqlParameter(RETURNVALUE, SqlDbType.Int, 4, ParameterDirection.ReturnValue, false, 0, 0, string.Empty, DataRowVersion.Default, null)); ///返回创建的SqlDataAdapter对象 return da; } /// <summary> /// 创建一个SqlDataAdapter对象，用此来执行SQL语句 /// </summary> /// <param name="cmdText">SQL语句</param> /// <param name="prams">SQL语句所需参数</param> /// <returns>返回SqlDataAdapter对象</returns> private SqlDataAdapter CreateSQLDataAdapter(string cmdText, SqlParameter[] prams) { ///打开数据库连接 Open(); ///设置SqlDataAdapter对象 SqlDataAdapter da = new SqlDataAdapter(cmdText, myConnection); ///添加把存储过程的参数 if (prams != null) { foreach (SqlParameter parameter in prams) { da.SelectCommand.Parameters.Add(parameter); } } ///添加返回参数ReturnValue da.SelectCommand.Parameters.Add( new SqlParameter(RETURNVALUE, SqlDbType.Int, 4, ParameterDirection.ReturnValue, false, 0, 0, string.Empty, DataRowVersion.Default, null)); ///返回创建的SqlDataAdapter对象 return da; } /// <summary> /// 生成存储过程参数 /// </summary> /// <param name="ParamName">存储过程名称</param> /// <param name="DbType">参数类型</param> /// <param name="Size">参数大小</param> /// <param name="Direction">参数方向</param> /// <param name="Value">参数值</param> /// <returns>新的 parameter 对象</returns> public SqlParameter CreateParam(string ParamName, SqlDbType DbType, Int32 Size, ParameterDirection Direction, object Value) { SqlParameter param; ///当参数大小为0时，不使用该参数大小值 if (Size > 0) { param = new SqlParameter(ParamName, DbType, Size); } else { ///当参数大小为0时，不使用该参数大小值 param = new SqlParameter(ParamName, DbType); } ///创建输出类型的参数 param.Direction = Direction; if (!(Direction == ParameterDirection.Output && Value == null)) { param.Value = Value; } ///返回创建的参数 return param; } /// <summary> /// 传入输入参数 /// </summary> /// <param name="ParamName">存储过程名称</param> /// <param name="DbType">参数类型</param></param> /// <param name="Size">参数大小</param> /// <param name="Value">参数值</param> /// <returns>新的parameter 对象</returns> public SqlParameter CreateInParam(string ParamName, SqlDbType DbType, int Size, object Value) { return CreateParam(ParamName, DbType, Size, ParameterDirection.Input, Value); } /// <summary> /// 传入返回值参数 /// </summary> /// <param name="ParamName">存储过程名称</param> /// <param name="DbType">参数类型</param> /// <param name="Size">参数大小</param> /// <returns>新的 parameter 对象</returns> public SqlParameter CreateOutParam(string ParamName, SqlDbType DbType, int Size) { return CreateParam(ParamName, DbType, Size, ParameterDirection.Output, null); } /// <summary> /// 传入返回值参数 /// </summary> /// <param name="ParamName">存储过程名称</param> /// <param name="DbType">参数类型</param> /// <param name="Size">参数大小</param> /// <returns>新的 parameter 对象</returns> public SqlParameter CreateReturnParam(string ParamName, SqlDbType DbType, int Size) { return CreateParam(ParamName, DbType, Size, ParameterDirection.ReturnValue, null); } } }