AJAX之xmlHttp

來源:互聯網
上載者:User

<script type="text/javascript" language="javascript">
<!--
//以XML求取資料
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 ('網路故障(xmlHttp.status='+xmlHttp.status+'),請稍後再試!');
}

result = xmlHttp.responseText; 
result = result.substring(0,result.indexOf("?EX"));

if(result != "false")
{ 
return true;
}
else
{
return false;
}
}
//-->
</script>''' <summary>
''' 檢測使用者是否存在<檔案名稱:../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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