AJAX之xmlHttp

   ajax之xmlhttp

            　　          ''' 
''' 检测用户是否存在''' 
''' 　　          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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