Hello! I'm a newbie to AJAX, and would really like to start using it
with my web application.
With the code below, what I'm trying to do is query the db and see if a
number already exists once the user types the value into the textbox,
then tabs out. I'd rather do this, than cause a post back and then
handle the number check that way.
With another attempt at my first real AJAX app, here's the initial
ASP.NET v1.1 page with the AJAX script in the Head tag, and I get the
"Unknown error" in the handleServerResponse() when it's assigning
"show" it's innnerHTML value:
<%@ Page Language="vb" AutoEventWireup="false"
Codebehind="WebForm1.aspx.vb" Inherits="AjaxTesting.WebForm1"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<title>WebForm1</title>
<meta name="GENERATOR" content="Microsoft Visual Studio .NET
7.1">
<meta name="CODE_LANGUAGE" content="Visual Basic .NET 7.1">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema"
content="http://schemas.microsoft.com/intellisense/ie5";>
<!-- Start script -->
<script>
var xmlHttp = createXmlHttpRequestObject();
function createXmlHttpRequestObject()
{
var xmlHttp;
if(window.ActiveXObject)
{
try
{
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
catch (e)
{
xmlHttp = false;
}
}
else
{
try
{
xmlHttp = new XMLHttpRequest();
}
catch (e)
{
xmlHttp = false;
}
}
if (!xmlHttp)
alert("Error creating the XMLHttpRequest object.");
else
return xmlHttp;
}
function process()
{
varWBS =
encodeURIComponent(document.getElementById("TextBox1").value);
xmlHttp.open("GET", "test.aspx?WBS=" + varWBS);
xmlHttp.onreadystatechange = handleServerResponse;
xmlHttp.send(null);
}
function handleServerResponse()
{
if (xmlHttp.readyState==4 || xmlHttp.readyState==200)
{
document.getElementById("show").innerHTML = xmlHttp.responseText;
}
}
</script>
<!-- End script -->
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="get" runat="server">
<TABLE id="Table1" cellSpacing="1"
cellPadding="1" width="75%" border="1">
<TR>
<TD>
<asp:TextBox id="TextBox1" runat="server"
onblur='process()'></asp:TextBox></TD>
</TR>
<TR>
<TD>
</TD>
</TR>
<TR>
<TD>
<asp:Button id="Button1" runat="server"
Text="Button"></asp:Button></TD>
</TR>
</TABLE>
<div id="show"></div>
</form>
</body>
</HTML>
**************
**************
The text.aspx page is simply this for the code behind:
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
'Put user code to initialize the page here
If Server.HtmlEncode(Request.QueryString("WBS")).ToString =
"1.2.8.5.001" Then
Response.Write("Please enter another WBS!")
Else
Response.Write("You can use this one!")
End If
End Sub
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ajax.NET Professional" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at http://groups.google.com/group/ajaxpro
The latest downloads of Ajax.NET Professional can be found at
http://www.ajaxpro.info
-~----------~----~----~----~------~----~------~--~---
