Using DNN 4.3.2
I'm getting Control not found error in callback response
This happens if I'm not logged in the site.
If I'm logged in, then it works as expected.

Upon digging in the framework code, I found that the ID of my module control is nothing, so the control id never comes in the query string of the request.

Framework Code in ClientAPI.vb

 Public Shared Function GetCallbackEventReference(ByVal objControl As Control, .....) As String

            .....
            Dim strControlID As String = objControl.ID
            .....
Here the objControl.ID is Nothing
If I'm logged in with some user, then its value is the name of the module control, and it works.


Any ideas?

I'm using my module user control control as the callback handler not a control in my module

This is simple a straight code, taken directly by following the tutorials. The objective is to fill a second drop down based upon selected value from first drop down without postback.
Here is the relevant code.

 Partial Class MyModuleUserControl
        Inherits Entities.Modules.PortalModuleBase
        Implements Entities.Modules.IActionable
        Implements IClientAPICallbackEventHandler

    Public Function RaiseClientAPICallbackEvent(ByVal eventArgument As String) As String  _
            Implements IClientAPICallbackEventHandler.RaiseClientAPICallbackEvent
        Return "Something"
   End Function

    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) _
        Handles MyBase.Load
        ...
         Me.ddFirst.Attributes.Add("onChange", ClientAPI.GetCallbackEventReference(Me, _
             "dnn.dom.getById('" + Me.ddFirst.ClientID + "').value", _
             "successFunc", _
              "dnn.dom.getById('" + Me.ddSecond.ClientID + "')", _
              "errorFunc"))
            ...    
    End Sub
End Class

If I'm logged in it works as expected and the successFunc executes, which populates the second drop down.
If I'm not logged in, the errorFunc executes and displays 404 Control Not Found error.

Glad to hear you figured out a solution.  (I hadn't had time to investigate it yet.)

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