Joe,

The problem still persists, but the funny thing is though, when I click it the first time, it gives the expected result, then I click it for the second time and the page title changes to the parent page title, and finally the third time, it throws the following error.

Exception Details: System.Web.HttpException: The state information is invalid for this page and might be corrupted.

[ViewStateException: Invalid viewstate.
Client IP: 127.0.0.1
Port:
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1
ViewState: /wEWIAKi4/6cAgKllvq1BgKllvbODgKolvLrBAKMls6bAQKnlsqwAwKnlobLCwKiloLoAQKmlp6JDgKiltq9DAKhltbWBALhsYTwDwKarLruDwLXmYvrDwLYyLLxDwLV+fLxDwKe7svwDwLL25ztDwKcjsTrDwKJ/cHzDwLinrryDwKH8IHUBwKH8P3sDwKK8PmJBgLu79W5AgKJ8NHOBAKJ8I3pDAKE8ImGAwKI8KWnDwKE8OHbDQKD8N30BQLcqYWMCg==
Referer: http://localhost:3529/testbed/testbed.aspx
Path: /Default.aspx]

[HttpException (0x80004005): The state information is invalid for this page and might be corrupted.]
System.Web.UI.ViewStateException.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidationError) +267
System.Web.UI.ClientScriptManager.EnsureEventValidationFieldLoaded() +2133067
System.Web.UI.ClientScriptManager.ValidateEvent(String uniqueId, String argument) +66
System.Web.UI.Control.ValidateEvent(String uniqueID, String eventArgument) +108
System.Web.UI.WebControls.LinkButton.RaisePostBackEvent(String eventArgument) +32
System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +177
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +7350
System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +213
System.Web.UI.Page.ProcessRequest() +86
System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) +18
System.Web.UI.Page.ProcessRequest(HttpContext context) +49
ASP.default_aspx.ProcessRequest(HttpContext context) in c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\de64b9f9\2255b98b\App_Web_kcay04ft.20.cs:0
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +358
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +64
 

Joe,

After trying different ways to overcome the problem with no success, I figured the only difference between the blog page and mine was asp and ascx. So I created a new aspx page and dropped it into a child site and its working fine. So I guess this is a bug after all, it only fails in an ascx page.

Cheers
Ken

Still didn't work, would there be any settings in web.config that would affect the ajax?

Cheers
Ken

Hi Joe,

I have tried and tried to get this working with no success and have found that even the simplest of controls in an UpdatePanel does not work. I have created a simple User Control with two buttons updating a label, this is used in a Child Site, could you see if this works on your end please? I did try poll, but as I told you before, it only fails on the second attempt to click a link, whereas Poll only gives you one chance.

Cheers
Ken

ASPX
<asp:UpdatePanel ID="upCategories" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:LinkButton ID="LinkButton1" runat="server" Text="One"></asp:LinkButton>
<asp:LinkButton ID="LinkButton2" runat="server" Text="Two"></asp:LinkButton>
<asp:Label ID="lblSelectedValue" runat="server" Text="None Selected"></asp:Label>
</ContentTemplate>
</asp:UpdatePanel>

CS
protected override void OnInit(EventArgs e)
{
base.OnInit(e);
this.LinkButton1.Click += new EventHandler(LinkButton1_Click);
this.LinkButton2.Click += new EventHandler(LinkButton2_Click);
Page.EnableViewState = true;
this.upCategories.Update();
}
protected void Page_Load(object sender, EventArgs e)
{
RegisterAsynLinks();
}
private void RegisterAsynLinks()
{
((ScriptManager)Page.Master.FindControl("ScriptManager1")).RegisterAsyncPostBackControl(this.LinkButton1);
((ScriptManager)Page.Master.FindControl("ScriptManager1")).RegisterAsyncPostBackControl(this.LinkButton2);
}
protected void LinkButton1_Click(object sender, EventArgs e)
{
this.lblSelectedValue.Text = ((LinkButton)sender).Text;
this.upCategories.Update();
}
protected void LinkButton2_Click(object sender, EventArgs e)
{
this.lblSelectedValue.Text = ((LinkButton)sender).Text;
this.upCategories.Update();
}