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AJAX xmlHttp
<script type="text/javascript" language="javascript"> <!-- //以XML求取数据 function XmlPost(theEmail) { var webFileUrl = "../User/CheckUser.aspx?LogonName=" + theEmail; var result = ""; if (window.ActiveXObject) { xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); } else if (window.XMLHttpRequest) { xmlHttp = new XMLHttpRequest(); } //var xmlHttp = new ActiveXObject("MSXML2.XMLHTTP"); xmlHttp.open("POST", webFileUrl, false); xmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded"); xmlHttp.send(""); xmlHttp.onreadystatechange=function() { if (xmlHttp.readyState==4) { result = xmlHttp.responseText; } } if(xmlHttp.status!=200) { alert ('网络故障(xmlHttp.status='+xmlHttp.status+'),请稍后再试!'); } result = xmlHttp.responseText; result = result.substring(0,result.indexOf("?EX")); if(result != "false") { return true; } else { return false; } } //--> </script>''' <summary>''' 检测用户是否存在<文件名:../User/CheckUser.aspx>''' </summary>''' <remarks>Created by dzh @2006/06/27 18:22</remarks>Partial 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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