用于MySql的SqlHelper

用于MySql的SqlHelper

     /// <summary>

     /// Title  ：MySqlHelper
     /// Author ：WinterT
     /// Date   ：2015-1-8 08:12:54
     /// Description：
     ///       ExecuteNonQuery
     ///       ExecuteScalar
     ///       ExecuteReader
     ///       ExecuteTable
     /// </summary>
     public static class MySqlHelper
     {
         /// <summary>
         /// 返回配置文件中指定的连接
         /// </summary>
         /// <returns>配置文件中指定的连接</returns>
         private static MySqlConnection GetConnection()
         {
             string connString = ConfigurationManager.ConnectionStrings[].ConnectionString;
             return new MySqlConnection(connString);
         }
         #region ExecuteNonQuery
         /// <summary>
         /// 执行sql语句
         /// </summary>
         /// <param name="sql">sql语句</param>
         /// <returns>受影响行数</returns>
         public static int ExecuteNonQuery(string sql)
         {
             using (MySqlConnection conn = GetConnection())
             {
                 using (MySqlCommand cmd = conn.CreateCommand())
                 {
                     cmd.CommandText = sql;
                     return cmd.ExecuteNonQuery();
                 }
             }
         }
         /// <summary>
         /// 根据给定连接，执行带参数的SQL语句
         /// </summary>
         /// <param name="conn">连接、使用前确保连接以打开。</param>
         /// <param name="sql">带参数的sql语句</param>
         /// <param name="paras">参数</param>
         /// <returns>受影响行数</returns>
         public static int ExecuteNonQuery
             (MySqlConnection conn, string sql, params MySqlParameter[] paras)
         {
             using (MySqlCommand cmd = conn.CreateCommand())
             {
                 cmd.CommandText = sql;
                 cmd.Parameters.AddRange(paras);
                 return cmd.ExecuteNonQuery();
             }
         }
         /// <summary>
         /// 执行带参数的SQL语句
         /// </summary>
         /// <param name="sql">带参数的sql语句</param>
         /// <param name="paras">参数</param>
         /// <returns>受影响行数</returns>
         public static int ExecuteNonQuery
             (string sql, params MySqlParameter[] paras)
         {
             using (MySqlConnection conn = GetConnection())
             {
                 return ExecuteNonQuery(conn, sql, paras);
             }
         }
         #endregion
         #region ExecuteScalar
         /// <summary>
         /// 执行sql语句，返回第一行第一列
         /// </summary>
         /// <param name="sql">sql语句</param>
         /// <returns>第一行第一列</returns>
         public static Object ExecuteScalar(string sql)
         {
             using (MySqlConnection conn = GetConnection())
             {
                 using (MySqlCommand cmd = conn.CreateCommand())
                 {
                     cmd.CommandText = sql;
                     return cmd.ExecuteScalar();
                 }
             }
         }
         /// <summary>
         /// 根据Connection对象，执行带参数的sql语句，返回第一行第一列
         /// </summary>
         /// <param name="conn">连接</param>
         /// <param name="sql">sql语句</param>
         /// <param name="paras">参数</param>
         /// <returns>返回第一行第一列</returns>
         public static object ExecuteScalar
             (MySqlConnection conn, string sql, MySqlParameter[] paras)
         {
             using (MySqlCommand cmd = conn.CreateCommand())
             {
                 cmd.CommandText = sql;
                 cmd.Parameters.AddRange(paras);
                 return cmd.ExecuteScalar();
             }
         }
         /// <summary>
         /// 执行带参数的sql语句，返回第一行第一列
         /// </summary>
         /// <param name="sql">sql语句</param>
         /// <param name="paras">参数</param>
         /// <returns>返回第一行第一列</returns>
         public static object ExecuteScalar
             (string sql, MySqlParameter[] paras)
         {
             using (MySqlConnection conn = GetConnection())
             {
                 return ExecuteScalar(conn, sql, paras);
             }
         }
         #endregion
         #region ExecuteReader
         /// <summary>
         /// 执行sql语句，返回一个MySqlDataReader
         /// </summary>
         /// <param name="sql">sql语句</param>
         /// <returns>一个MySqlDataReader对象</returns>
         public static MySqlDataReader ExecuteReader(string sql)
         {
             MySqlConnection conn = GetConnection();
             using (MySqlCommand cmd = conn.CreateCommand())
             {
                 cmd.CommandText = sql;
                 conn.Open();
                 return cmd.ExecuteReader(CommandBehavior.CloseConnection);
             }
         }
         /// <summary>
         /// 根据指定的连接，执行带参数的sql语句，返回一个Reader对象
         /// </summary>
         /// <param name="conn">连接</param>
         /// <param name="sql">sql语句</param>
         /// <param name="paras">参数</param>
         /// <returns>一个MySqlDataReader对象</returns>
         public static MySqlDataReader ExecuteReader
             (MySqlConnection conn, string sql, params MySqlParameter[] paras)
         {
             using (MySqlCommand cmd = conn.CreateCommand())
             {
                 cmd.CommandText = sql;
                 cmd.Parameters.AddRange(paras);
                 conn.Open();
                 return cmd.ExecuteReader(CommandBehavior.CloseConnection);
             }
         }
         /// <summary>
         /// 执行带参数的sql语句，返回一个Reader对象
         /// </summary>
         /// <param name="sql">sql语句</param>
         /// <param name="paras">参数</param>
         /// <returns>一个MySqlDataReader对象</returns>
         public static MySqlDataReader ExecuteReader
             (string sql, params MySqlParameter[] paras)
         {
             MySqlConnection conn = GetConnection();
             using (MySqlCommand cmd = conn.CreateCommand())
             {
                 return ExecuteReader(conn, sql, paras);
             }
         }
         #endregion
         #region ExecuteTable
         /// <summary>
         /// 执行sql语句，返回一个DataTable
         /// </summary>
         /// <param name="sql">sql语句</param>
         /// <returns>DataTable</returns>
         public static DataTable ExecuteTable(string sql)
         {
             using (MySqlConnection conn = GetConnection())
             {
                 using (MySqlCommand cmd = conn.CreateCommand())
                 {
                     cmd.CommandText = sql;
                     using (MySqlDataReader reader = cmd.ExecuteReader())
                     {
                         DataTable table = new DataTable();
                         table.Load(reader);
                         return table;
                     }
                 }
             }
         }
         /// <summary>
         /// 根据连接，执行带参数的sql语句，返回一个DataTable
         /// </summary>
         /// <param name="conn">连接，切记连接已打开</param>
         /// <param name="sql">sql语句</param>
         /// <param name="paras">参数</param>
         /// <returns>DataTable</returns>
         public static DataTable ExecuteTable
             (MySqlConnection conn, string sql, params MySqlParameter[] paras)
         {
             using (MySqlCommand cmd = conn.CreateCommand())
             {
                 cmd.CommandText = sql;
                 cmd.Parameters.AddRange(paras);
                 using (MySqlDataReader reader = cmd.ExecuteReader())
                 {
                     DataTable table = new DataTable();
                     table.Load(reader);
                     return table;
                 }
             }
         }
         /// <summary>
         /// 执行带参数的sql语句
         /// </summary>
         /// <param name="sql">sql语句</param>
         /// <param name="paras">参数</param>
         /// <returns>DataTable</returns>
         public static DataTable ExecuteTable
             (string sql, params MySqlParameter[] paras)
         {
             using (MySqlConnection conn = GetConnection())
             {
                 return ExecuteTable(conn, sql, paras);
             }
         }

         #endregion
     }