App_Code/DBClass.cs

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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.SqlClient;

/// <summary>
/// DBClass 的摘要说明
/// </summary>
public class DBClass
{
    public DBClass()
    {
        //下载于51aspx.com
        // TODO: 在此处添加构造函数逻辑
        //下载于51aspx.com
    }
    /// <summary>
    /// 数据库连接
    /// </summary>
    /// <returns>SqlConnection对象</returns>
    /// 
    public static string Num;
    public SqlConnection GetConnection()
    {//下载于51aspx.com
        string myStr = ConfigurationManager.ConnectionStrings["connStr"].ConnectionString;
        SqlConnection myConn = new SqlConnection(myStr);
        return myConn;
    }
}