Mike Henders
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Mike Henders
asked on 05 Nov 2010, 02:42 AM
I am getting an exception when docking a window into my document host. Using Prism and MVVM according to your blog post on the subject I have the following simple XAML in m shell.
Two RadPane tabs are added to the RadPaneGroup. Initially both are set as "Tabbed Document". I run the application, bring up the context-menu for either pane and change it to "Dockable". The pane appears in a separate window as expected. When I click on the window and start dragging it the compass appears as expected. Now, as soon as I drag the window over one of the compass points the yellow preview rectangle appears as expected to indicate where the window will be positioned when docked. Then I immediately get the following exception.
<telerik:RadDocking Margin="0,0" Grid.Row="2" x:Name="MainDock"> <telerik:RadDocking.DocumentHost> <telerik:RadPaneGroup cal:RegionManager.RegionName="MainRegion"/> </telerik:RadDocking.DocumentHost></telerik:RadDocking>Two RadPane tabs are added to the RadPaneGroup. Initially both are set as "Tabbed Document". I run the application, bring up the context-menu for either pane and change it to "Dockable". The pane appears in a separate window as expected. When I click on the window and start dragging it the compass appears as expected. Now, as soon as I drag the window over one of the compass points the yellow preview rectangle appears as expected to indicate where the window will be positioned when docked. Then I immediately get the following exception.
System.Transactions Critical: 0 : <TraceRecord xmlns="http://schemas.microsoft.com/2004/10/E2ETraceEvent/TraceRecord" Severity="Critical"><TraceIdentifier>http://msdn.microsoft.com/TraceCodes/System/ActivityTracing/2004/07/Reliability/Exception/Unhandled<;/TraceIdentifier><Description>Unhandled exception</Description><AppDomain>AZSi.SIB.WINAdmin2.vshost.exe</AppDomain><Exception><ExceptionType>System.ArgumentNullException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</ExceptionType><Message>Value cannot be null.Parameter name: element</Message><StackTrace> at MS.Internal.Media.VisualTreeUtils.AsNonNullVisual(DependencyObject element, Visual& visual, Visual3D& visual3D) at System.Windows.Media.Visual.IsAncestorOf(DependencyObject descendant) at Telerik.Windows.Controls.RadDocking.<>c__DisplayClass8.<GetPaneGroup>b__7(RadPaneGroup group) in c:\Builds\WPF_Scrum\Release_WPF_2010_Q2_SP2\Sources\Development\Controls\Docking\Docking\RadDocking.cs:line 1342 at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate) at Telerik.Windows.Controls.RadDocking.GetPaneGroup(Point position, UIElement subtree, UIElement parent) in c:\Builds\WPF_Scrum\Release_WPF_2010_Q2_SP2\Sources\Development\Controls\Docking\Docking\RadDocking.cs:line 1339 at Telerik.Windows.Controls.RadDocking.MoveDraggedElement(Point position, ToolWindow draggedWindow) in c:\Builds\WPF_Scrum\Release_WPF_2010_Q2_SP2\Sources\Development\Controls\Docking\Docking\RadDocking.cs:line 1725 at Telerik.Windows.Controls.RadDocking.OnDragDelta(Point globalPosition, Object draggedElement) in c:\Builds\WPF_Scrum\Release_WPF_2010_Q2_SP2\Sources\Development\Controls\Docking\Docking\RadDocking.cs:line 837 at Telerik.Windows.Controls.RadDocking.OnDragDelta(Object sender, DragInfoEventArgs e) in c:\Builds\WPF_Scrum\Release_WPF_2010_Q2_SP2\Sources\Development\Controls\Docking\Docking\RadDocking.cs:line 1284 at Telerik.Windows.Controls.Docking.DragInfoEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget) in c:\Builds\WPF_Scrum\Release_WPF_2010_Q2_SP2\Sources\Development\Controls\Docking\Docking\DragDrop\DragInfoEventArgs.cs:line 48 at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target) at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e) at Telerik.Windows.Controls.Docking.FakePopup.<.ctor>b__0(Object s, RoutedEventArgs e) in c:\Builds\WPF_Scrum\Release_WPF_2010_Q2_SP2\Sources\Development\Controls\Docking\Docking\Popup\FakePopup.cs:line 26 at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e) at Telerik.Windows.Controls.Docking.DragDropHelper.DragDelta(UIElement target, UIElement dragRoot, MouseEventArgs e) in c:\Builds\WPF_Scrum\Release_WPF_2010_Q2_SP2\Sources\Development\Controls\Docking\Docking\DragDrop\DragDropHelper.cs:line 55 at Telerik.Windows.Controls.Docking.DragDropHelper.DragDelta(UIElement target, MouseEventArgs e) in c:\Builds\WPF_Scrum\Release_WPF_2010_Q2_SP2\Sources\Development\Controls\Docking\Docking\DragDrop\DragDropHelper.cs:line 50 at Telerik.Windows.Controls.Docking.ToolWindow.OnToolWindowMouseMove(Object sender, MouseEventArgs e) in c:\Builds\WPF_Scrum\Release_WPF_2010_Q2_SP2\Sources\Development\Controls\Docking\Docking\ToolWindow.cs:line 721 at System.Windows.Input.MouseEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget) at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target) at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args) at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted) at System.Windows.Input.InputManager.ProcessStagingArea() at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input) at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport) at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel) at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs) at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler) at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs) at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam) at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg) at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame) at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame) at System.Windows.Threading.Dispatcher.Run() at System.Windows.Application.RunDispatcher(Object ignore) at System.Windows.Application.RunInternal(Window window) at System.Windows.Application.Run(Window window) at System.Windows.Application.Run() at AZSi.SIB.WINAdmin2.App.Main() in C:\Source\AZSi\Trunk\Source\AZSi.SIB.WINAdmin2\obj\x86\Release\App.g.cs:line 0 at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args) at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args) at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() at System.Threading.ThreadHelper.ThreadStart_Context(Object state) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.ThreadHelper.ThreadStart()</StackTrace><ExceptionString>System.ArgumentNullException: Value cannot be null.Parameter name: element at MS.Internal.Media.VisualTreeUtils.AsNonNullVisual(DependencyObject element, Visual& visual, Visual3D& visual3D) at System.Windows.Media.Visual.IsAncestorOf(DependencyObject descendant) at Telerik.Windows.Controls.RadDocking.<>c__DisplayClass8.<GetPaneGroup>b__7(RadPaneGroup group) in c:\Builds\WPF_Scrum\Release_WPF_2010_Q2_SP2\Sources\Development\Controls\Docking\Docking\RadDocking.cs:line 1342 at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate) at Telerik.Windows.Controls.RadDocking.GetPaneGroup(Point position, UIElement subtree, UIElement parent) in c:\Builds\WPF_Scrum\Release_WPF_2010_Q2_SP2\Sources\Development\Controls\Docking\Docking\RadDocking.cs:line 1339 at Telerik.Windows.Controls.RadDocking.MoveDraggedElement(Point position, ToolWindow draggedWindow) in c:\Builds\WPF_Scrum\Release_WPF_2010_Q2_SP2\Sources\Development\Controls\Docking\Docking\RadDocking.cs:line 1725 at Telerik.Windows.Controls.RadDocking.OnDragDelta(Point globalPosition, Object draggedElement) in c:\Builds\WPF_Scrum\Release_WPF_2010_Q2_SP2\Sources\Development\Controls\Docking\Docking\RadDocking.cs:line 837 at Telerik.Windows.Controls.RadDocking.OnDragDelta(Object sender, DragInfoEventArgs e) in c:\Builds\WPF_Scrum\Release_WPF_2010_Q2_SP2\Sources\Development\Controls\Docking\Docking\RadDocking.cs:line 1284 at Telerik.Windows.Controls.Docking.DragInfoEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget) in c:\Builds\WPF_Scrum\Release_WPF_2010_Q2_SP2\Sources\Development\Controls\Docking\Docking\DragDrop\DragInfoEventArgs.cs:line 48 at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target) at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e) at Telerik.Windows.Controls.Docking.FakePopup.<.ctor>b__0(Object s, RoutedEventArgs e) in c:\Builds\WPF_Scrum\Release_WPF_2010_Q2_SP2\Sources\Development\Controls\Docking\Docking\Popup\FakePopup.cs:line 26 at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e) at Telerik.Windows.Controls.Docking.DragDropHelper.DragDelta(UIElement target, UIElement dragRoot, MouseEventArgs e) in c:\Builds\WPF_Scrum\Release_WPF_2010_Q2_SP2\Sources\Development\Controls\Docking\Docking\DragDrop\DragDropHelper.cs:line 55 at Telerik.Windows.Controls.Docking.DragDropHelper.DragDelta(UIElement target, MouseEventArgs e) in c:\Builds\WPF_Scrum\Release_WPF_2010_Q2_SP2\Sources\Development\Controls\Docking\Docking\DragDrop\DragDropHelper.cs:line 50 at Telerik.Windows.Controls.Docking.ToolWindow.OnToolWindowMouseMove(Object sender, MouseEventArgs e) in c:\Builds\WPF_Scrum\Release_WPF_2010_Q2_SP2\Sources\Development\Controls\Docking\Docking\ToolWindow.cs:line 721 at System.Windows.Input.MouseEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget) at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target) at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args) at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted) at System.Windows.Input.InputManager.ProcessStagingArea() at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input) at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport) at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel) at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs) at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler) at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs) at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam) at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg) at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame) at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame) at System.Windows.Threading.Dispatcher.Run() at System.Windows.Application.RunDispatcher(Object ignore) at System.Windows.Application.RunInternal(Window window) at System.Windows.Application.Run(Window window) at System.Windows.Application.Run() at AZSi.SIB.WINAdmin2.App.Main() in C:\Source\AZSi\Trunk\Source\AZSi.SIB.WINAdmin2\obj\x86\Release\App.g.cs:line 0 at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args) at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args) at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() at System.Threading.ThreadHelper.ThreadStart_Context(Object state) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.ThreadHelper.ThreadStart()</ExceptionString><DataItems><Data></Data></DataItems></Exception></TraceRecord>An unhandled exception of type 'System.ArgumentNullException' occurred in WindowsBase.dllAdditional information: Value cannot be null.4 Answers, 1 is accepted
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Hello Mike,
George
the Telerik team
Could you please give us more information about the problem? Do you have any custom logic in the event handlers of the Compass? We will greatly appreciate a sample project of yours. It will definitely help us in further pinpointing and resolving the problem. Can you attach the sample project to this thread?
I will be glad to assist you further.
George
the Telerik team
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Mike Henders
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answered on 10 Nov 2010, 06:23 PM
George,
I haven't added any event handlers to the Compass I'll strip the code down to a sample project over the weekend and post it to the thread.
Cheers,
Mike
I haven't added any event handlers to the Compass I'll strip the code down to a sample project over the weekend and post it to the thread.
Cheers,
Mike
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Mike Henders
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answered on 17 Nov 2010, 01:47 PM
George,
I created a sample project and opened support ticket 367683 to upload it.
Cheers,
Mike
I created a sample project and opened support ticket 367683 to upload it.
Cheers,
Mike
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Mike Henders
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answered on 18 Nov 2010, 03:22 PM
George and his team found the problem. I can't put the RadPaneGroup directly into the DocumentHost (see my original post for the XAML), but instead need to put it into a RadSplitContainer which then goes in the DocumentHost.
--Mike
--Mike