Now, I'm getting "msxml3.dll: Unspecified Error" for the line:
if (xmlHttp.readyState == 4 || xmlHttp.status == 200)
..via my Script Debugger.
<%@ 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 language="javascript">
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.status == 200)
{
document.getElementById("show").innerHTML = xmlHttp.responseText;
}
}
</script>
<!-- End script -->
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<asp:TextBox id="TextBox1" style="Z-INDEX: 101; LEFT: 24px;
POSITION: absolute; TOP: 24px"
runat="server" onblur='process()'></asp:TextBox>
<div id="show" />
</form>
</body>
</HTML>
**********
**********
The code behind for the text.aspx page is very simple for now, and is:
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
********************************************
*******************************************
bubberz wrote:
> 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