ASP.NET AJAX Discussion and Suggestions

Re: Webpart Error - Script controls may not be registered before PreRender

johnnyQuest — Wed, 29 Nov 2006 14:12:51 GMT

Thanks to Dani and Luis. I appreciate both your feedback with this. I'm going to update my ctp to use the november release and see if that resolves the issue.

Thanks again! Very much appreciated :)

Re: Webpart Error - Script controls may not be registered before PreRender

Luis Abreu — Tue, 28 Nov 2006 20:49:22 GMT

hello.

johnny, what i was trying to say was that the updatepanel you're using is trying to perform that action on its oninit method and this only happens in the beta 1 release. so, it looks like you're using the preview bits of october with the beta 2 release of the ajax extensions (which means that you have to upgrade from the october release to the november release).

Re: Webpart Error - Script controls may not be registered before PreRender

websolutions — Tue, 28 Nov 2006 20:31:26 GMT

Hi JohnnyQuest

You shouldn't explicitly call the OnInit method. It is called by the framework. The only thing you should be careful regarding the event trigger methods is when you override them as you might be loosing functionality if you override and don't call the base class' method.

Regarding cleaning the dll, did you have any of the previous versions of atlas installed? esp. did you have the beta 1 and have you migrated to beta 2? If not then you don't need to worry about that.

If you tried all the tips in this thread and none of them worked for you, you could try posting your code so we can have a look at it.

Re: Webpart Error - Script controls may not be registered before PreRender

johnnyQuest — Tue, 28 Nov 2006 20:19:24 GMT

Hi Luis.

I'm sort of new to the .NET world and I followed the entire thread regarding this error but I'm still unsure about what to do to correct it. I don't explicitly call the OnInit method. Should I? The other suggestion someone wrote was to flush out the GAC. Does that mean I should delete all mentions of the Microsoft.Web.Preview.dll file in the GAC? If you could provide details that would be great.

Thanks in advance for everyone's help.

Re: Webpart Error - Script controls may not be registered before PreRender

Luis Abreu — Wed, 22 Nov 2006 23:25:52 GMT

hello.

well, it looks like the same kinf of error as the one that was presented earlier. in the latest release, UpdateProgress doesn't override the oninit method.

Re: Webpart Error - Script controls may not be registered before PreRender

johnnyQuest — Wed, 22 Nov 2006 17:11:04 GMT

Thanks for your help.

I did check the dll, GAC, and the temp asp.net folder... all checked out fine which is even more perplexing. Nonetheless, I appreciate the suggestion.

Re: Webpart Error - Script controls may not be registered before PreRender

websolutions — Wed, 22 Nov 2006 16:37:30 GMT

Check if the microsoft.web.extensions.dll version is the same. Check it in the bin directory of your application or GAC if it is gac-ed and in the temporary asp.net files.

Also check if the web.config file is identical.

Re: Webpart Error - Script controls may not be registered before PreRender

johnnyQuest — Wed, 22 Nov 2006 16:30:17 GMT

Hi All.

I am getting the same type of error but it happens when using the UpdateProgress tag. I am using ASP.NET Ajax version 1.0.61025. I have the same versions installed on my local machine and on our company's dev box. When I run it on my local box, it works fine, when I publish to our dev box, it blows up with this error. After I remove the updateProgress tag it works fine. Can anyone offer a solution to this?

Code causing the error:

<asp:UpdatePanel ID="upnlVehiclePrice" runat="server" UpdateMode="conditional">
       <ContentTemplate>
              <asp:UpdateProgress ID="uprVehiclePrice" runat="server" Visible="true" DisplayAfter="0" AssociatedUpdatePanelID="upnlVehicleSelection">
                      <ProgressTemplate>
                              Retreiving Vehicle Price...</br>
                              <asp:Image ID="imgRetrievingVehiclePrice" runat="server" ImageUrl="ajax-loader.gif" />
                      </ProgressTemplate>
            </asp:UpdateProgress>
     </ContentTemplate>
</asp:UpdatePanel>

Error details/Stack Trace:

Script controls may not be registered before PreRender.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidOperationException: Script controls may not be registered before PreRender.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[InvalidOperationException: Script controls may not be registered before PreRender.]
   Microsoft.Web.UI.ScriptControlManager.RegisterScriptControl(TScriptControl scriptControl) +144
   Microsoft.Web.UI.ScriptManager.RegisterScriptControl(TScriptControl scriptControl) +114
   Microsoft.Web.Preview.UI.UpdateProgress.OnInit(EventArgs e) +122
   System.Web.UI.Control.InitRecursive(Control namingContainer) +321
   System.Web.UI.Control.InitRecursive(Control namingContainer) +198
   System.Web.UI.Control.AddedControl(Control control, Int32 index) +2067711
   System.Web.UI.ControlCollection.Add(Control child) +146
   Microsoft.Web.UI.UpdatePanel.CreateContents(Boolean recreate) +291
   Microsoft.Web.UI.UpdatePanel.OnInit(EventArgs e) +101
   System.Web.UI.Control.InitRecursive(Control namingContainer) +321
   System.Web.UI.Control.InitRecursive(Control namingContainer) +198
   System.Web.UI.Control.InitRecursive(Control namingContainer) +198
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +692

Re: Webpart Error - Script controls may not be registered before PreRender

websolutions — Wed, 22 Nov 2006 15:30:36 GMT

I have also come accross this issue and after lots of flushing and rebuilding I found that it actually was a coding issue losing prerender handlers.

i've detailed it here: http://danielballa.blogspot.com/2006/11/script-controls-may-not-be-registered.html

Re: Webpart Error - Script controls may not be registered before PreRender

den2005 — Wed, 22 Nov 2006 08:04:03 GMT

Hi rinando,

same problem, what do you meant by flushed your GAC of all copies of Microsoft.Web.Preview and all copies including in the application working on and in C:\Program Files\Microsoft ASP.NET\ASP.NET 2.0 AJAX Extensions\v1.0.61025?

den2005

Re: Webpart Error - Script controls may not be registered before PreRender

rinando — Tue, 21 Nov 2006 14:40:22 GMT

Hi,

Luis Abreu is right. I flushed my GAC and delete all copies of Microsoft.Web.Preview.dll's on my computer, restarted IIS, restarted Visual Studio and did a Build all.
It works!

Thanx!

Greetz!

Re: Webpart Error - Script controls may not be registered before PreRender

Luis Abreu — Tue, 21 Nov 2006 12:50:11 GMT

hello.

gillou01:

what makes you say that? i have installed the latest build of the CTP that i could find on ajax web site

well, the stack error you're getting:

[InvalidOperationException: Script controls may not be registered before PreRender.]
   Microsoft.Web.UI.ScriptControlManager.RegisterScriptControl(TScriptControl scriptControl) +112
   Microsoft.Web.UI.ScriptManager.RegisterScriptControl(TScriptControl scriptControl) +100
   Microsoft.Web.Preview.UI.Controls.WebParts.WebPartManager.OnInit(EventArgs e) +148
   System.Web.UI.Control.InitRecursive(Control namingContainer) +460
   System.Web.UI.Control.InitRecursive(Control namingContainer) +272
   System.Web.UI.Control.InitRecursive(Control namingContainer) +272
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1745

if you look at the value-added dll with reflector you'll be able to confirm that it doesn't override the OnInit method.

Re: Webpart Error - Script controls may not be registered before PreRender

rinando — Tue, 21 Nov 2006 09:43:35 GMT

Hi,

I've got the same problem, but I found out that when I put the line with <fr:WebPartManager> above the <asp:ScriptManager> using <asp:WebPartZone> the error disappears. But when I use <fr:WebPartZone> the error is back.

My version of Microsoft.Web.Preview.dll is also 1.0.61025.0. (2 nov 2006)

Re: Webpart Error - Script controls may not be registered before PreRender

gillou01 — Tue, 21 Nov 2006 09:30:22 GMT

hi,

what makes you say that? i have installed the latest build of the CTP that i could find on ajax web site

The version of the Microsoft.Web.Preview.dll is 1.0.61025.0.

Re: Webpart Error - Script controls may not be registered before PreRender

Luis Abreu — Mon, 20 Nov 2006 18:25:50 GMT

hello.

well, you're using at least an old version of the CTP. if you use the november ctp, that bug will go away...