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AJAX之xmlHttp

作者:黑客防线网安Ajax教程基地 来源:黑客防线网安Ajax教程基地 浏览次数:0

本篇关键词: 'falseresult
黑客防线网安网讯:  <script type="text/javascript" language="javascript">          <!--          //以XML求取数据          function XmlPost(theEmail)          {          var webFileUr...

  <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 Sub
  End Class
  

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