Comments on: Silverlight Toolkit – Using Silverlight TreeView Control

By: Jules

Jules — Sun, 27 Sep 2009 15:17:10 +0000

I enclosed my Tree View control, but couldnt get past the folloiwhg catastorpic error in the Visual Designer.

Catastrophic failure (Exception from HRESULT: 0×8000FFFF (E_UNEXPECTED))
at MS.Internal.XcpImports.CheckHResult(UInt32 hr)
at MS.Internal.XcpImports.RenderTargetBitmapRender(HostingRenderTargetBitmap bitmap, UIElement visual, Int32& dirtyX, Int32& dirtyY, Int32& dirtyWidth, Int32& dirtyHeight)
at System.Windows.Interop.HostingRenderTargetBitmap.Render(UIElement visual)
at MS.Internal.Silverlight.Host.RuntimeInterop.RenderElementToTargetBitmap(Int32 elementKey, Int32 targetBitmapIdentifier)
at MS.Internal.Silverlight.Host.Interop.RenderElementToTargetBitmap(Int32 element, Int32 targetBitmapIdentifier, ISilverlightContentDownloadCallback urlcallback)
at MS.Internal.Silverlight.Host.CiderSilverlightImageHost.CiderInternalImage.UpdateBitmap()
at MS.Internal.Silverlight.Host.CiderSilverlightImageHost.CiderInternalImage.UpdateTree()
at MS.Internal.Silverlight.Host.CiderSilverlightImageHost.CiderInternalImage.MeasureOverride(Size constraint)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at MS.Internal.Silverlight.Host.CiderSilverlightImageHost.MeasureOverride(Size constraint)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at System.Windows.ContextLayoutManager.UpdateLayout()
at System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg)
at System.Windows.Media.MediaContext.InvokeOnRenderCallback.DoWork()
at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()
at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)

By: b.dhanapal

b.dhanapal — Tue, 11 Aug 2009 08:37:36 +0000

hi,

I need to populate the silverlight treeview dynamically using sqlserver database and asp.net

thank you

By: Atul Katare

Atul Katare — Mon, 27 Jul 2009 10:06:00 +0000

I want add node at run time.
Is it possible using your example?
Thank You

By: sir fidel

sir fidel — Fri, 12 Jun 2009 21:01:58 +0000

I am trying to create treeview control in silverlight and tried to follow your demo but i am not able too…how can i create treeview with the toolkit march

how can i create treeview with THE MARCH RELEASE

By: j h

j h — Wed, 10 Jun 2009 15:24:16 +0000

Get HierarchicalDataTemplate from System.Windows.Controls.Toolkit rather than the older Microsoft.Windows.Controls.dll

By: thaianhduc

thaianhduc — Thu, 04 Jun 2009 10:11:16 +0000

I am using SilverLight 3 and cannot find the HierarchicalDataTemplate control. Any idea?
In fact i cannot find the Microsoft.Windows.Controls.dll even though i have installed toolkit 3.

By: Kellen Sunderland

Kellen Sunderland — Tue, 07 Apr 2009 15:59:36 +0000

I would love to see some events to hook into with tree view for drag and drop. Displaying hierarchical data is good but editing it would be better.

By: Arch

Arch — Fri, 19 Dec 2008 14:24:17 +0000

Good article. The problem with this approach in any non-trivial application is that you would not load your entire tree hierarchy up front. How would you implement lazy loading of child nodes?

I’ve seen solutions that use the Item_Expanded event to load the child nodes. But it’s usually done by iterating thru your (strongly-typed) collection and converting each member to TreeViewItems before adding to tree. This negates the advantages of binding your objects to the tree and breaks mv-vm capability.

Any good solution to this?

By: Abhishek vashistha

Abhishek vashistha — Tue, 16 Dec 2008 05:48:38 +0000

Hi Michael,
I am not able to use themes as you have used(ExpressionDarkTheme).
I am getting AG_E_PARSER_BAD_TYPE when components are being initialized.

Please suggest

By: Mark McPherson

Mark McPherson — Thu, 04 Dec 2008 19:22:07 +0000

My data is retrieved from ADO.NET Data Services which means the TreeView nodes must be created after the data has been retrieved. In code I set the ItemsSource for the TreeView but nothing is displayed. I am using the HierarchicalDataTemplate as outlined in your sample. In the debugger I can see that 60+ records (class instances) are in the ItemsSource.

What am I missing. This pattern of setting the ItemsSource after the async call finishes works great for the DataGrid.

Thanks,
Mark