MySql c#通用类

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;//导命名空间

using System.Data;

using MySql.Data.MySqlClient;

using System.Configuration;

namespace Test.DAL.MySql

{

public class DBHelp { private readonly string connString = ConfigurationManager.ConnectionStrings["mysql"].ToString(); private MySqlConnection mySqlConnection = null; private MySqlCommand mySqlCommand = null; protected MySqlDataReader mySqlDataReader = null; private MySqlDataAdapter mySqlDataAdapter = null; private DataSet dataSet = null; private int i = 0; private MySqlConnection ExecuteMySqlConnection() { try { this.mySqlConnection = new MySqlConnection(this.connString); this.mySqlConnection.Open(); } catch (Exception) { throw; } return this.mySqlConnection; } private MySqlCommand ExecuteMySqlCommand(string sql,CommandType commandType,MySqlParameter[] mySqlParameter) { try { this.mySqlConnection = this.ExecuteMySqlConnection(); this.mySqlCommand = new MySqlCommand(sql, this.mySqlConnection); if (mySqlParameter != null && mySqlParameter.Length > 0) { this.mySqlCommand.Parameters.AddRange(mySqlParameter); } this.mySqlCommand.CommandType = commandType; } catch (Exception) { throw; } return this.mySqlCommand; } protected MySqlDataReader ExecuteMySqlDataReader(string sql, CommandType commandType, MySqlParameter[] mySqlParameter) { try { this.mySqlCommand = this.ExecuteMySqlCommand(sql, commandType, mySqlParameter); this.mySqlDataReader = this.mySqlCommand.ExecuteReader(); } catch (Exception) { throw; } return this.mySqlDataReader; } protected DataSet ExecuteDataSet(string sql, CommandType commandType, MySqlParameter[] mySqlParameter) { this.dataSet = new DataSet(); try { this.mySqlCommand = this.ExecuteMySqlCommand(sql, commandType, mySqlParameter); this.mySqlDataAdapter = new MySqlDataAdapter(this.mySqlCommand); this.mySqlDataAdapter.Fill(dataSet); } catch (Exception) { throw; } return this.dataSet; } protected int ExecuteScalar(string sql, CommandType commandType, MySqlParameter[] mySqlParameter) { try { this.mySqlCommand = this.ExecuteMySqlCommand(sql, commandType, mySqlParameter); this.i = int.Parse(this.mySqlCommand.ExecuteScalar().ToString()); } catch (Exception) { throw; } return this.i; } protected int ExecuteNonQuery(string sql, CommandType commandType, MySqlParameter[] mySqlParameter) { try { this.mySqlCommand = this.ExecuteMySqlCommand(sql, commandType, mySqlParameter); this.i = this.mySqlCommand.ExecuteNonQuery(); } catch (Exception) { throw; } return this.i; } protected void CloseConnection(MySqlConnection mySqlConnection) { try { if (mySqlConnection != null) { mySqlConnection = null; mySqlConnection.Close(); } } catch (Exception) { throw; } } protected void CloseDataReader(MySqlDataReader mySqlDataReader) { try { if (mySqlDataReader != null) { mySqlDataReader = null; mySqlDataReader.Close(); } } catch (Exception) { throw; } } }

}