Web.Config文件代码：(配置文件)
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<appSettings>
<add key="Myconn" value="Access"/>
</appSettings>
<connectionStrings>
<add name="oleconn" providerName="System.Data.OleDb" connectionString="Provider=Microsoft.Jet.OleDb.4.0;Data
Source=|DataDirectory|92dotnet.mdb"/>
<add name="sqlconn" providerName="System.Data.Sql" connectionString="server=
(local);database=92dotnet;uid=sa;pwd=gmajlhx"/>
</connectionStrings>
</configuration>
Mydataone.cs文件代码：(基类)
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.OleDb;
using System.Data.SqlClient;
namespace Mydotnet
{
public class Mydataone //数据层基类
{
public Mydataone()
{
}
/// <summary>
/// 返回一个Connection对象
/// </summary>
/// <param name="Connstring">Myconn的值,判断Connection对象属于哪种类型</param>
/// <return
