NullReferenceException in designer

[Dédé]

Hi,

I'm using VS2012sp1 and Telerik 2013.1.220.45 trial.

I am creating a RadWindow with this XAML code :

<telerik:RadWindow x:Class="WPF.TestForm1"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
        Height="300" Width="300" Header="Hello">
    <Grid>

    </Grid>
</telerik:RadWindow>

I have changed the C# inherited class to RadWindow.

When I click on the designer Window, the designer shows a NullReferenceException with this stacktrace :

à MS.Internal.VSUtilities.GetBuildAction(IVsHierarchy hierarchy, UInt32 itemid)
  à Microsoft.VisualStudio.ExpressionHost.HostServices.HostSourceItem.<>c__DisplayClass9.<Microsoft.Expression.DesignHost.IHostSourceItem.get_BuildItemType>b__7()
  à Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.Call.InvokeWorker()
  à Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.Call.Invoke(Boolean waitingInExternalCall)
  à Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.InvokeCall(Call call)
  à Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.DirectInvoke(Action action, Int32 sourceApartmentId, Int32 targetApartmentId, Int32 originId, WaitHandle aborted)
  à Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.DirectInvokeInbound(Action action, Int32 targetApartmentId)
  à Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.MarshalIn(Action action, Int32 targetApartmentId)
  à Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.MarshalIn(IRemoteObject targetObject, Action action)
  à Microsoft.VisualStudio.ExpressionHost.HostServices.HostSourceItem.Microsoft.Expression.DesignHost.IHostSourceItem.get_BuildItemType()
  à Microsoft.Expression.DesignHost.HostSourceItemData..ctor(IHostSourceItem item)
  à Microsoft.VisualStudio.ExpressionHost.HostServices.HostProject.<Microsoft.Expression.DesignHost.IHostProject.get_InitializationData>d__7e.MoveNext()
  à Microsoft.Expression.DesignHost.Isolation.Remoting.RemoteEnumerable`2.RemoteEnumerationThunk.<>c__DisplayClass8.<NextChunk>b__7()
  à Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.<>c__DisplayClass16`1.<MarshalIn>b__15()
  à Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.Call.InvokeWorker()

I have no VS extensions (just those VS installs by itslef like nuget, and Telerik extensions).

Does someone have any idea ?

[Alek]

Hello Damien,

 Unfortunately we did not manage to reproduce the scenario. We tested it under the same conditions as you wrote in your post - using a RadWindow as a UserControl, VS2012, dll version 2013.1.220.45. 
Can you send us more details about your project which will help us reproduce the exception?

Regards,
Alek
the Telerik team

[Dédé]

Hi,

Do you think there can be a difference between trial and registered version of your lib ? Because I am using the trial.

The problem seams to occur when a telerik WPF control is selected in designer, by clicking on it in the designer view, or when clicking on it's xaml node in the xaml view.
If I choose another standard WPF control, I see the designer, even when the control is inside a telerik one.



Hum, I tried to create a sample snippet, but it seams that it is working now...

In the first case, a fresh windows/vs2012 installation, with all windows updates, I have downloaded the trial WPF, installed, created a new WPF application (not a telerik WPF), copied assemblies to a sub-folder of solution (all telerik assembly), added them as reference, changed xaml and cs code like I said in the previous post. And the designer show me exceptions when a Telerik control is focused.

In the second case, I created a new radcontrols wpf application, selected some options, and no errors at all. And when opening my previous solution, no errors too... I'm going to check with my collegue that has the first case behavior...

[Alek]

Hi Damien,

We would like to assure you that the trial assemblies are fully functional, the only difference from the licensed assemblies is the trial message.

Regards,
Alek
the Telerik team