I have a special situation where I have a client (who’s web site use to be DNN 2.X) needs to have the ability to do post-backs.

This is because we have a small input box on the webpage where a user can submit hidden input to another DNN page with an IFRAME that links to an HTML page that accepts the submitted information from the simple input boxes.

My problem is that I have to carry over this feature from DNN 2.X over to a new site that is 4.7
And because DNN 4.7 is Ajaxing the entire page, I cannot do a traditional Form post-back to a HTML/ASP page inside an DNN Iframe. I get an error that reads

Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.

Any suggestions on how to submit this info from my DNN Page to an HTML page inside of a DNN DNN 4.7 Iframe?

I feel like I've stumped the forum on this one. Or i'm not explaining the issue.

Does anyone have an idea how i can attempt to force a Full Form Post Back on a DNN 4.7 version, like you could in early DNN 2.x versions?

Any help or suggestion as to a work around would be great!

Thanks.

Hello RegGFX,
You are right, DNN has changed the way forms are submitted. We are aware of the problem and are currently writing a work around. We will be posting a patch shortly for DNN 4.7.
Thanks for the heads up,

Actually- I'm going to need a sample of what you are trying to do. ListX is properly posting back in all places except for within Module Settings. This is because, the ListX module controls its own __dopostback and submit functions. The Module Settings fails because the form postback is wrapped inside of an AJAX Update container. What are you attempting that is having a problem?

Also - one additional note: If you need to have a control on your dotnet based module (not listx) post back as it did previously - you need to register it within the Script Manager as requiring a full postback:

If DotNetNuke.Framework.AJAX.IsInstalled Then
DotNetNuke.Framework.AJAX.RegisterScriptManager()
DotNetNuke.Framework.AJAX.RegisterPostBackControl(btnMyButton)
End If

Additionally - if you are stuck in a scenario where you need to do that postback but CANNOT reference the most recent version (4.7) of DNN or greater within the code - meaning the Framework.AJAX doesn't exist - don't fret. You can do this with reflection. Our code base requires that we compile against DNN 3.0.11 - which means LOTS of new things don't exist in the core reference. Here is how I did the same code as above with reflection:

Private Function ForceAJAXPostBack(ByVal objects As Object(), Optional isModuleSetting as Boolean = False)
Try
Dim asm As System.Reflection.Assembly = System.Reflection.Assembly.GetAssembly(GetType(DotNetNuke.Framework.CDefault))
Dim t As Type = asm.GetType("DotNetNuke.Framework.AJAX")
Dim ctrl As Object
If Not t Is Nothing Then
'THIS TYPE IS SUPPORTED BY OUR FRAMEWORK - DO THE CORRECTION
'If DotNetNuke.Framework.AJAX.IsInstalled Then
' DotNetNuke.Framework.AJAX.RegisterScriptManager()
' DotNetNuke.Framework.AJAX.RegisterPostBackControl(btnMyButton)
'End If
Dim _IsInstalled As Boolean
Dim b As Boolean = (t.InvokeMember("IsInstalled", Reflection.BindingFlags.InvokeMethod, Nothing, Nothing, New Object() {}))
'IF THIS IS A MODULE SETTINGS CONTROL - AJAX IS ALWAYS ENABLED SO FORCE _IsInstalled TO TRUE
If _IsInstalled OrElse isModuleSetting Then
t.InvokeMember("RegisterScriptManager", Reflection.BindingFlags.InvokeMethod, Nothing, Nothing, New Object() {})
Dim obj As Object
For Each obj In objects
t.InvokeMember("RegisterPostBackControl", Reflection.BindingFlags.InvokeMethod, Nothing, Nothing, New Object() {obj})
Next
End If
End If
Catch ex As Exception
'LOG AN EXCEPTION HERE IF YOU MUST
End Try
End Function

WOW!!!

HOLY "CHANGE THE CORE CODE" BATMAN!
I knew something was up!

Thanks for the Reply...

Here is what i know... in the YE'OL DNN 2.x versions you could put a simple input boxes with a submit button(pasted inside the TEXT/HTML as HTML) and submit hidden input info to a DNN Page that had the IFRAMED HTML or ASP page. That DNN Page with the HTML or ASP page IFRAMED inside of the DNN page would recieve the data via the hiddin input from the "POST BACK".

However, in DNN 4.7 you get an error called
"Failed to load viewstate."
I'm just trying to find a way to post hiddin input submitted from a traditional form text box to a HTML or Classic ASP page that rests inside a DNN IFRAME Module.

Thanks...

I knew i wasn't seeing things. Although an odd process i have to use POST-BACK ability alot and 4.7 appears to kill it.

Until a patch is announced, what version of DNN 4 will still permit me to force a full POST-BACK as before the changes?

The last 4.6 was the one you want. *OR* you can disable AJAX in 4.7 - that is handled within the Host Settings. You might want to start off there.