Error while using overview control

GoXam
1

Hi

We are expanding a node..after expanding we will get around nodes...
If we have Overview control while doing expanding we are getting error...it goes to application undhandled exception...
if we remove the overview control we are not getting any error....
Please help....
2

What four-part version of which DLL are you using?

What is the unhandled exception?

How did you declare/initialize the Overview control?

3
What is that Four-Part Version...?
you mean..this..
Version : 1.2.1.4
Runtime :v2.0.50727
Unhandled exception is one in Silverlight app.cs
public App(){ this.Startup += this.Application_Startup; this.UnhandledException += this.Application_UnhandledException;
}
We are declaring it in Xaml
and we are initializing in the page...load..
this.Loaded += (s, e) => { myOverview.Observed = this.rcDiagram;
}
4

First, 1.2.1.* is not a supported version – that was a beta version. You should install and use the latest kit, for version 1.2.6.4.

Second, what was the unhandled exception? Yes, that’s the declaration for the unhandled exception handler. But I’d like to get as much information as possible about what the exception was, and what happened to cause the exception.

Third, how did you declare the Overview control in XAML?

We really need more information to be able to guess what’s happening in your application.

5
Have a look at the xaml ..

<Canvas x:Name="rcCanvasdrawingArea"
VerticalAlignment="Top"
Ish*tTestVisible="True">
<toolkit:BusyIndicator x:Name="bysIndicator"
BusyContent="loading................"
Foreground="Black">

<go:Diagram x:Name="rcDiagram"
Width="Auto"
Height="Auto"
Margin="10,25,0,10"
HorizontalAlignment="Left"
VerticalAlignment="Top"
AllowClipboard="False"
AllowCopy="False"
AllowDelete="False"
AllowMove="False"
AllowUndo="False"
Background="White"
BorderBrush="{x:Null}"
LinkTemplate="{StaticResource LinkTemplate}"
MaximumSelectionCount="1"
NodeTemplateDictionary="{StaticResource NodeTemplateDictionary}"
Padding="75">




<Grid x:Name="OverViewPaneGrid"
Width="180"
Height="146"
Margin="0,0,25,2"
HorizontalAlignment="Right"
VerticalAlignment="Bottom"
MouseRightButtonUp="OverViewPaneGrid_MouseRightButtonUp">
<Rectangle Margin="0"
Fill="White"
RadiusX="5"
RadiusY="5"
Stroke="DarkGray" />
<go:Overview x:Name="myOverview"
Width="180"
BorderBrush="White" />
<Grid x:Name="OverViewSliderGrid"
Width="23"
Height="146"
Margin="0,0,0,2"
HorizontalAlignment="Right"
VerticalAlignment="Bottom">
<Grid Height="19"
Margin="0,3,4,0"
VerticalAlignment="Top">
<Button x:Name="Plus"
Margin="1,-2,2,0"
Content="+"
Style="{StaticResource +ButtonStyle}" />

<Slider x:Name="myScaleSlider"
Height="100"
Margin="-6,0,0,0"
HorizontalAlignment="Center"
Cursor="Arrow"
Maximum="3"
Minimum="0"
Orientation="Vertical" />
<Button x:Name="minus"
Height="19"
Margin="0,0,4,3"
VerticalAlignment="Bottom"
Content="-"
Style="{StaticResource -ButtonStyle}" />



in the Constructor of the form..
this.Loaded += (s, e) => { myOverview.Observed = this.rcDiagram;
}
the problem which we are facing is with overview control when ever we adding more number of nodes or modiying the appliation throws or goes to Undhandled exception part of the App.cs
The application works fine when we remove overviace control...for the above said scenario...
We dont know whether the exception is raised by Goxam libraries or with something else
6

Thanks for the XAML, but the important information is still missing: what was the unhandled exception, and have you upgraded to 1.2.6?

7

Here is additional information.

- Its not unhandled exception. The app is throwing 4004 error crashing.
- While this is happening, the unhandled excpetion block is getting bypassed.
Here is the Java script message displayed in the browser)
Webpage error details
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; GTB5; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; InfoPath.2; .NET4.0C; .NET4.0E)
Timestamp: Fri, 22 Apr 2011 16:31:05 UTC

Message: Unhandled Error in Silverlight Application
Code: 4004
Category: ManagedRuntimeError
Message: System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary.
at System.ThrowHelper.ThrowKeyNotFoundException()
at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
at System.Windows.ResourceManagerWrapper.GetResourceForUri(Uri xamlUri, Type componentType)
Line: 54
Char: 13
Code: 0
8

Well, the error message clearly shows that you are trying to use a resource name that isn’t defined in any of the resource dictionaries in your application.

Unfortunately Silverlight doesn’t provide good error messages, so it isn’t clear exactly what the key value was.

You’ll need to track down what the problem is. You could try breaking on the KeyNotFoundException in Visual Studio and then look at the stack.

9

But how would I capture the KeyNotFoundException, if the system is not even getting in to the unhandledException block.
While running the program in the debug mode using VS2010, Its not even hitting any breakpoint, when the error happens. The app is crashing with white screen in browser (IE) and javascript error icon in the bottom left corner of the screen.
This jscript error is thrown from the default implementation of the html page (object tag), where the jscript method is called on OnError event.

Now, if user hide the overview control, then the expansion activity wont throw error.
The error happens (as visible in the screen for user), is when the nodes are expanded and the expanded visible area is being accomodated in the overview control.
Let me know your thoughts.
10

In Visual Studio, bring up the Debug > Exceptions window and check the Thrown checkbox to break on that exception, which I believe is listed under System.Windows.

11

well, its been a while since I replied to this post. We are getting the same error in a difference scenario. Based on your recommendation, I checked Throw for the KeyNotFound exception in the Exception dialog box, under debug menu.

Here is the details of the exception I received. Let me know if this make any sense to you. Pls help.
System.InvalidOperationException crossed a native/managed boundary
Message=Operation is not valid due to the current state of the object.
StackTrace:
at System.Windows.DependencyObject.MS.Internal.IManagedPeerBase.get_NativeObject()
at System.Windows.DependencyObject.AddEventListener(DependencyProperty property, Delegate handler, Boolean handledEventsToo)
at System.Windows.UIElement.AddHandler(RoutedEvent routedEvent, Delegate handler, Boolean handledEventsToo)
at System.Windows.UIElementExtensions.<>c__DisplayClass2a.b__27(IObserver`1 observer)
at System.Windows.Controls.Internals.AnonymousObservable`1.<>c__DisplayClass1.b__0()
at System.Windows.Controls.Internals.CurrentThreadScheduler.EnsureTrampoline(Action action)
at System.Windows.Controls.Internals.AnonymousObservable`1.Subscribe(IObserver`1 observer)
at System.Windows.Controls.Internals.Observable.<>c__DisplayClass2d`1.<>c__DisplayClass2f.b__2c(Object o)
InnerException:
12

This is yet another stack trace that doesn’t appear to have anything to do with GoXam.

From what I see nothing makes sense. Perhaps you can find some clues by searching the web for those exceptions and internal Silverlight methods.

Another possibility is that somehow the Silverlight implementation has been corrupted. Do you get the same error on different machines?