4）请求的CheckLogin.aspx的后台代码 - jquery ajax实例代码（验证用户名唯一性、实现遮罩层登录验证界面）

    4）请求的CheckLogin.aspx的后台代码，前台清除剩Page命令一行
using System;
using System.Data;
 
public partial class CheckLogin : System.Web.UI.Page
{
 protected void Page_Load(object sender, EventArgs e)
 {
 try
 {
 String strCode = Request.QueryString["Code"];
 String strName = Request.QueryString["Name"];
 String strPassword = Request.QueryString["Pwd"];
 
 if (strCode != Session["Code"].ToString())
 {
 Response.Write("false");
 }
 else
 {
 DAO.SqlHelper helper = new DAO.SqlHelper();
 DataTable dt = helper.FillDataTable(String.Format("Select UserName,TrueName From Clients Where UserName='{0}' And Password='{1}'",
  strName,
  strPassword
  ));
 if (dt != null && dt.Rows.Count > 0)
 {
  Session["TrueName"] = dt.Rows[0]["TrueName"].ToString();
  Response.Write(dt.Rows[0]["TrueName"].ToString());
 }
 else
 {
  Response.Write("false");
 }
 }
 }
 catch
 {
 Response.Write("false");
 }
 }
}