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09.05.2008 at 05:23AM PDT, ID: 23705930
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7.4

ASP.NET 3.5 AJAX Postback on one server but not other

Asked by cmhunty in Visual Studio, Programming for ASP.NET, .NET Framework 3.x versions

Tags: ,

Hi

I've created a test application which works fine on my local test system. It is a simple AJAX page which just updates a value in an update panel when selecting a value in a listbox. Code below.

When I transfer it over (including the full web.config) over to my live server, the page posts back when I select a value.

Both my dev box and the live system have .NET 3.5 SP1 installed.

Does anyone have any thoughts why this may be happening?

Thanks

ChrisStart Free Trial 
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ASPX Page:
 
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Test Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:ScriptManager ID="sm" runat="server" EnablePartialRendering="true"></asp:ScriptManager>
        <asp:ListBox ID="lbTest" runat="server" AutoPostBack="true" />
        
        <asp:UpdatePanel ID="upTest" runat="server">
            <Triggers>
                <asp:AsyncPostBackTrigger ControlID="lbTest" EventName="SelectedIndexChanged" />
            </Triggers>
            <ContentTemplate>
                <asp:Label ID="lblTest" runat="server" />
            </ContentTemplate>
        </asp:UpdatePanel>
    </div>
    </form>
</body>
</html>
 
 
Code Behind: 
 
Partial Class _Default
    Inherits System.Web.UI.Page
 
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        If Not IsPostBack Then
            For i As Integer = 1 To 10
                lbTest.Items.Add(i)
            Next
        End If
    End Sub
 
    Protected Sub lbTest_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles lbTest.SelectedIndexChanged
        lblTest.Text = lbTest.SelectedValue
    End Sub
End Class
[+][-]09.05.2008 at 05:49AM PDT, ID: 22398173

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[+][-]09.05.2008 at 06:43AM PDT, ID: 22398800

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[+][-]09.05.2008 at 08:50AM PDT, ID: 22400290

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[+][-]09.05.2008 at 09:03AM PDT, ID: 22400475

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[+][-]09.05.2008 at 09:04AM PDT, ID: 22400493

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[+][-]09.09.2008 at 01:03AM PDT, ID: 22425038

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About this solution

Zones: Visual Studio, Programming for ASP.NET, .NET Framework 3.x versions
Tags: ASP.NET VB.NET, Firefox, IE7
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Solution Provided By: cmhunty
Participating Experts: 2
Solution Grade: A
 
 
 
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