All updates perform full postback | Tech Off

Hi guys,

I just cannot get AJAX Update panel to perform as I expect.

I am in VS2008, a new ASP.NET website,

add a ScriptManager
add an UpdatePanel
Inside Update Panel, add a button

In the buttons OnClick() event, add the following

Button1.Text = DateTime.Now.ToString();

Problem:

Every time I press the button, I get a full postback!!!
I have tried lots of examples from the web and get full postbacks on all of them. I am using the built in webserver with VS2008

Update: Just noticed also, that for a micro second I get the "Done but with Errors on Page" flash in the status bar. I can also run demo AJAX pages from websites without fault.

Can anyone point me in a direction to investigate ? Full code to webform below.

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm3.aspx.cs" Inherits="WebApplication1.WebForm3" %>

<%@ Register assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" namespace="System.Web.UI" tagprefix="asp" %>

<!

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>Untitled Page</title>

</head>

<body>

<div>

<asp:ScriptManager ID="ScriptManager1" runat="server">

</asp:ScriptManager>

</div>

<asp:UpdatePanel ID="UpdatePanel1" runat="server">

<asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />

</ContentTemplate>

</asp:UpdatePanel>

</form>

</body>

</html>

Thanks

Mike

m1keread

Thanks,

I am targetting ASP.NET 2.0 presently, does this make a difference ?

Mike

JChung2006

You're referencing ASP.NET AJAX 1.0 with your Register directive. Is the site you've developed targeting 3.5?

JChung2006

Are you referencing ASP.NET AJAX HttpHandlers and HttpModules in your Web.config? It takes more than just adding a reference to the server-side ASP.NET AJAX controls to enable ASP.NET AJAX on a Web site.

m1keread

Thanks again.

No I am not referencing any HTTP Handlers or Modules explicitly is the web.config.

I have noticed that is added an Assembly into the <Compilation> section in the web.config itself,

file as shown below.

<?

xml version="1.0"?><configuration>

<

appSettings/>

<

connectionStrings/>

<

system.web>

<!--

Set compilation debug="true" to insert debugging

symbols into the compiled page. Because this

affects performance, set this value to true only

during development.

-->

<

compilation debug="false">

<

assemblies>

<

add assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/></assemblies>
</compilation>

<!--

The <authentication> section enables configuration

of the security authentication mode used by

ASP.NET to identify an incoming user.

-->

<

authentication mode="Windows"/>

<!--

The <customErrors> section enables configuration

of what to do if/when an unhandled error occurs

during the execution of a request. Specifically,

it enables developers to configure html error pages

to be displayed in place of a error stack trace.

</customErrors>

-->

</

system.web>

</

configuration>

JChung2006

At a minimum, you need to reference the ScriptResource handler at least so that ASP.NET will know how to get the ASP.NET AJAX scripts from the System.Web.Extensions assembly.

Reference: Configuring ASP.NET AJAX [ASP.NET AJAX Documentation]

IIS 6.0-style Web.config (add to configuration/system.web)

<httpHandlers>
  <remove verb="*" path="*.asmx"/>
  <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
  <add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
  <add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"/>
</httpHandlers>
<httpModules>
  <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
</httpModules>

IIS 7.0-style Web.config (add to configuration)

<system.webServer>
  <handlers>
    <remove name="WebServiceHandlerFactory-Integrated"/>
    <add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
    <add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
    <add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
  </handlers>
  <modules>
    <add name="ScriptModule" preCondition="integratedMode" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
  </modules>
  <validation validateIntegratedModeConfiguration="false"/>
</system.webServer>

m1keread

Hey man, you are a star.

I poked aroung Google after your previous post and have got it all working now with help from the following page.

http://asp.net/ajax/documentation/live/ConfiguringASPNETAJAX.aspx

Basically re-iterating what you have posted above with some added goodies.

I assumed (incorrectly) that when the site was created, you got all the web.config bits set up for you. In VS2005 when you created a special ASP.NET AJAX enabled site, your web.config was updated correctly, now in VS2008, you dont get the option to create an AJAX enabled site, so I guess you have to hack the web.config file yourself.

All good learning stuff.

Thanks again

Mike

JChung2006

There's a download with ASP.NET AJAX 1.0 project templates for Visual Studio 2008 so you don't have to mess with the Web.config.