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AJAX xmlHttp

黄舟
黄舟Original
2017-02-24 15:27:281539browse

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 (&#39;网络故障(xmlHttp.status=&#39;+xmlHttp.status+&#39;),请稍后再试!&#39;);            
            }                            
            result = xmlHttp.responseText;           
            result = result.substring(0,result.indexOf("?EX"));                    
            if(result != "false")          
            {                        
            return true;          
            }          
            else          
            {            
            return false;          
            }        
            }        
            //-->    
            </script>&#39;&#39;&#39; <summary>&#39;&#39;&#39; 检测用户是否存在<文件名:../User/CheckUser.aspx>&#39;&#39;&#39; </summary>&#39;&#39;&#39; 
            <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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