C1 Treeview and C1 Datagrid selection synchonization

C1 Treeview and C1 Datagrid selection synchonization

Posted by: mayur.purandare on 9 November 2017, 4:54 pm EST

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  mayur.purandare

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  Posted 9 November 2017, 4:54 pm EST

  Hello,

  I am using C1 Treeview and C1 Datagrid in my project.

  When I select any Item from the treeview, corresponding row in the datagrid is selected.

  Is there any way that the selection in the datagrid can be reflected in the treeview?

• 

  sonu.singh

  

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  Posted 12 November 2017, 4:40 pm EST

  Hi,
  
  It’s a real pain for some strange reason, you have to use ContainerFromItem to get the container, then invoke the IsSelected property to get or set whether a C1.WPF.C1TreeViewItem control is selected.

  private void Treeview_SelectionChanged(object sender, SelectionChangedEventArgs e)
          {
              selectedPerson = (treeview.SelectedItem.DataContext as Person);
              datatree.SelectedItem = SelectedPerson;
          }
  
          private void Datatree_SelectionChanged(object sender, C1.WPF.DataGrid.DataGridSelectionChangedEventArgs e)
          {
              selectedPerson = (datatree.SelectedItem as Person);
              C1TreeViewItem item = treeview.ItemContainerGenerator.ContainerFromItem(SelectedPerson) as C1TreeViewItem;
              item.IsSelected = true;
          }
  

  Also, find a sample application attached for complete implementation.

  Thanks,
  
  Singh

  SelectionInC1TreeView.zip

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  mayur.purandare

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  Posted 12 November 2017, 6:06 pm EST

  Thank you for the reply.

  I’ll check this and will get back to you.

  ~Mayur

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  mayur.purandare

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  Posted 13 November 2017, 4:48 pm EST

  Hello,

  I am using MVVM in the project.

  Attached is the sample code where I tried to sync the treeview and datagrid selection.

  However, when I copied same code to my Project it is giving me following exception.

  Message : Object reference not set to an instance of an object.

  Source : C1.WPF.DataGrid.4
  
  Stack Trace:
  
  at C1.WPF.DataGrid.DataGridView.#41g(DataGridCell #Nc, EventArgs #tQ, Boolean #51g)
  
  at C1.WPF.DataGrid.DataGridView.#Y1g(Object #BQ, C1TappedEventArgs #tQ)
  
  at C1.WPF.C1TapHelper.#ftg(Object #BQ, RoutedEventArgs #tQ)
  
  at System.Windows.Input.MouseButtonEventArgs.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.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
  
  at System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e)
  
  at System.Windows.Input.MouseButtonEventArgs.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 System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

  TreeViewDatagridSync.zip

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  mayur.purandare

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  Posted 13 November 2017, 4:49 pm EST

  Attaching the error file

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  sonu.singh

  

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  Posted 13 November 2017, 5:28 pm EST

  Hi,
  
  I could not replicate the issue with the latest build. which can be downloaded from the link below:
  
  http://prerelease.componentone.com/dotnet40/C1WPFLibrary/2017-T3/C1WPFBasicLibrary.4_4.0.20173.578.zip

  See the attached screenshots for your sample.

  Thanks,
  
  Singh
  
  

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  mayur.purandare

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  Posted 19 November 2017, 4:35 pm EST

  Thanks a lot.

  ~Mayur