Hello,

This defently looks like a bug.  I will investigate this some further.  A couple of  questions:

• are you redefining the template for the dockingcontrol somehow through a style or controltemplate?
• are you developing an xbap application or stand alone app?
• What are the security rights of your application, can it create top level windows and popups?

Thanks,

Bragi.

Hello,

Yes, that would help me a lot, that way I can easely reproduce the error. You can send the project at support@jastdev.com if you don't mind.

Hi,

Here some behaviour:

Case A, from a WinForm

If I call, my WPF window from a winform (I have created a new winform that calls the WPF when pressing a button), I have an exception indicating "Object reference not set to an instance of an object." on "Application.Run(new Form1());". Strange.

Code used to open the WPF window in button click event:

            var wpfwindow = new eSense.DashBoard();
            ElementHost.EnableModelessKeyboardInterop(wpfwindow);
            wpfwindow.Show();

Case B

I have add all my WPF Pages to your Demo1 project and I call my main page instead of yours: Works perfectly.

I guess there is something either in WPF or perhaps in DockingControl (and probably underlying WPF stuff) that breaks when a WPF winform is opened from a WinForm.

Hope that helps.

Thanks

Frankidoze

Hello,

I have found the problem.  It really is 2 fold.  The problem originates in the fact that you are declaring the pages (or user controls) in an external library.  Because of this, the URI to the resource changes to:

Source="/eSense.DAC;component/OrgUnitTool.xaml"

Note how I put the '/eSense.DAC;component' in front of the resource name.  This is required to indicate the assembly that contains the xaml resource.

This error situation wasn't properly caught and caused a null reference exception.  So, the fastest way for you to continue is to simply update the 'Source' property on all the ToolFrameItems.  Here's a complete copy of your DockingControl implementation, corrected (also note I removed a 'Width property on one of the ToolFrames, which caused it to resize incorrectly):

<d:DockingControl x:Name="dockingControl" Background="Transparent">
            <d:ToolFrame Name="orgUnit" Dock="Left" Location="Visible" IsDropTarget="True" TrueFloating="True" Width="150" >
                <d:ToolFrameItem x:Name="orgUnitToolItem" Source="/eSense.DAC;component/OrgUnitTool.xaml" Title="Organization Unit" />
            </d:ToolFrame>
            <d:ToolFrame Name="settings" Dock="Bottom"  Location="Visible" RelativeTo="orgUnit" TrueFloating="True" IsDropTarget="True" Height="150">
                <d:ToolFrameItem x:Name="settingsItem" Source="/eSense.DAC;component/OrgUnitSettingsTool.xaml" Title="Settings" />
            </d:ToolFrame>
            <d:ToolFrame Name="body" HasHeader="False" 
                      TabStripPlacement="Top"
                      CanClose="False"
                      TabVisibility="Visible"
                      IsDropTarget="False"
                      CanPersist="False" TrueFloating="True">
                <d:ToolFrameItem Source="/eSense.DAC;component/Alarm.xaml"  Title="Alarm" IsDocument="False" />
            </d:ToolFrame>
        </d:DockingControl>

In the mean time, I will update the library so that the error situation is handled more gracefully.

Thank you for the Feedback.

Bragi.

Hello,

After I got your code, I first ran it, saw what was going on, fixed it, and only later changed the URI reference since I had a suspision that was causing it.  I figured simply fixing this URI might have also fixed the problem, I guess it didnt. sorry for that. Anyway, I got it running here, so I will make a new release of the bugfix and send it to you.

The idea behind the URI is this: everything is indeed declared in the same assembly, but during execution, the 'main' assembly (that of the application) is not the same as the assembly in which the resource was defined.  WPF starts looking in the application assembly, not in the declaring assembly.  I hope that explains it a little.

Cheers.

Bragi.