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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;
public partial class _Default : System.Web.UI.Page
{
//ÇåÇåÔ¶ùhttp://blog.csdn.net/21aspnet
    SqlConnection sqlcon;
    SqlCommand sqlcom;
    string strCon = "Data Source=(local);Database=Êý¾Ý¿âÃû;Uid=ÕʺÅ;Pwd=ÃÜÂë";
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
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char code;
string checkCode = String.Empty;
System.Random random1 = new Random();
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