数据访问基础类

 1        /**//// <summary>
 2        /// 执行存储过程
 3        /// </summary>
 4        /// <param name="storedProcName">存储过程名</param>
 5        /// <param name="parameters">存储过程参数</param>
 6        /// <param name="tableName">DataSet结果中的表名</param>
 7        /// <returns>DataSet</returns>
 8        public static DataSet RunProcedure(string storedProcName, IDataParameter[] parameters, string tableName)
 9        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                DataSet dataSet = new DataSet();
                connection.Open();
                SqlDataAdapter sqlDA = new SqlDataAdapter();
                sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
                sqlDA.Fill(dataSet, tableName);
                connection.Close();
                return dataSet;
            }
        }

 1        /**//// <summary>
 2        /// 构建 SqlCommand 对象(用来返回一个结果集，而不是一个整数值)
 3        /// </summary>
 4        /// <param name="connection">数据库连接</param>
 5        /// <param name="storedProcName">存储过程名</param>
 6        /// <param name="parameters">存储过程参数</param>
 7        /// <returns>SqlCommand</returns>
 8        private static SqlCommand BuildQueryCommand(SqlConnection connection, string storedProcName, IDataParameter[] parameters)
 9        {
            SqlCommand command = new SqlCommand(storedProcName, connection);
            command.CommandType = CommandType.StoredProcedure;
            foreach (SqlParameter parameter in parameters)
            {
                if (parameter != null)
                {
                    // 检查未分配值的输出参数,将其分配以DBNull.Value.
                    if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
                        (parameter.Value == null))
                    {
                        parameter.Value = DBNull.Value;
                    }
                    command.Parameters.Add(parameter);
                }
            }

            return command;
        }