MySQL数据库连接类 - .NET技术 / C#

using System;
using System.Data;
using System.Configuration;
using System.Web;

using System.Data.Common;

using System.Collections;
using System.Collections.Specialized;
/// <summary>
/// db 的摘要说明
/// </summary>
/// 
namespace yuqing
{
  public class db
  {
  public db()
  {
  //conn = new SqlConnection(connectionString);
  //conn.Open();

  }
  public db(string configString)
  {
  ConfigString = configString;
  }


  private string _confirString = "ConnectionString";
  /**/
  /// <summary>
  /// 属性,设置数据库连接字符串
  /// </summary>
  public string ConfigString
  {
  get
  {
  return _confirString;
  }
  set
  {
  _confirString = value;
  }
  }


  #region 获得数据库的类型public string GetProviderName(string ConfigString)
  /**/
  /// <summary>
  /// 返回数据提供者<