AJAX之xmlHttp

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&＃39;&＃39;&＃39; 检测用户是否存在<文件名：../User/CheckUser.aspx>&＃39;&＃39;&＃39; 
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　　          Created by dzh @2006/06/27 18:22Partial Class Web_User_CheckUser    
　　          Inherits System.Web.UI.Page
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load        
    If Request.QueryString("LogonName") Is Nothing Then            
    Response.Write("false" + "?EX")           
     Response.End()            
     Exit Sub        
     End If
        If (New EasyClick.EasyBusiness.UserBusiness).GetUserByLogonName(Request.QueryString("LogonName").ToString) Is Nothing Then         
           Response.Write("false" + "?EX")            
           Response.End()            
           Exit Sub        
           Else            
           Response.Write("true" + "?EX")            
           Response.End()            
           Exit Sub        
           End If    
           End SubEnd Class

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