System.NullReferenceException: Object reference not set to an instance of an object. |
at Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.ArrangeOverride(Size finalSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.ScrollContentPresenter.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Control.ArrangeOverride(Size arrangeBounds) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Border.ArrangeOverride(Size finalSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Decorator.ArrangeOverride(Size arrangeSize) |
at System.Windows.Documents.AdornerDecorator.ArrangeOverride(Size finalSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Control.ArrangeOverride(Size arrangeBounds) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.DockPanel.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at MS.Internal.Helper.ArrangeElementWithSingleChild(UIElement element, Size arrangeSize) |
at System.Windows.Controls.ContentPresenter.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Border.ArrangeOverride(Size finalSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Control.ArrangeOverride(Size arrangeBounds) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at MS.Internal.Helper.ArrangeElementWithSingleChild(UIElement element, Size arrangeSize) |
at System.Windows.Controls.ContentPresenter.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Border.ArrangeOverride(Size finalSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Page.ArrangeOverride(Size arrangeBounds) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at MS.Internal.Helper.ArrangeElementWithSingleChild(UIElement element, Size arrangeSize) |
at System.Windows.Controls.ContentPresenter.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Border.ArrangeOverride(Size finalSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Control.ArrangeOverride(Size arrangeBounds) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.ScrollContentPresenter.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Control.ArrangeOverride(Size arrangeBounds) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at MS.Internal.Helper.ArrangeElementWithSingleChild(UIElement element, Size arrangeSize) |
at System.Windows.Controls.ContentPresenter.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Border.ArrangeOverride(Size finalSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Control.ArrangeOverride(Size arrangeBounds) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at MS.Internal.Helper.ArrangeElementWithSingleChild(UIElement element, Size arrangeSize) |
at System.Windows.Controls.ContentPresenter.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Border.ArrangeOverride(Size finalSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Page.ArrangeOverride(Size arrangeBounds) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at MS.Internal.Helper.ArrangeElementWithSingleChild(UIElement element, Size arrangeSize) |
at System.Windows.Controls.ContentPresenter.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Border.ArrangeOverride(Size finalSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Control.ArrangeOverride(Size arrangeBounds) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.ScrollContentPresenter.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Control.ArrangeOverride(Size arrangeBounds) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at MS.Internal.Helper.ArrangeElementWithSingleChild(UIElement element, Size arrangeSize) |
at System.Windows.Controls.ContentPresenter.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Border.ArrangeOverride(Size finalSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Page.ArrangeOverride(Size arrangeBounds) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at MS.Internal.Helper.ArrangeElementWithSingleChild(UIElement element, Size arrangeSize) |
at System.Windows.Controls.ContentPresenter.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Border.ArrangeOverride(Size finalSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Control.ArrangeOverride(Size arrangeBounds) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.DockPanel.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at MS.Internal.Helper.ArrangeElementWithSingleChild(UIElement element, Size arrangeSize) |
at System.Windows.Controls.ContentPresenter.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Border.ArrangeOverride(Size finalSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Page.ArrangeOverride(Size arrangeBounds) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at MS.Internal.Helper.ArrangeElementWithSingleChild(UIElement element, Size arrangeSize) |
at System.Windows.Controls.ContentPresenter.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Border.ArrangeOverride(Size finalSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Control.ArrangeOverride(Size arrangeBounds) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at MS.Internal.Helper.ArrangeElementWithSingleChild(UIElement element, Size arrangeSize) |
at System.Windows.Controls.ContentPresenter.ArrangeOverride(Size arrangeSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Decorator.ArrangeOverride(Size arrangeSize) |
at System.Windows.Documents.AdornerDecorator.ArrangeOverride(Size finalSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Controls.Border.ArrangeOverride(Size finalSize) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.Window.ArrangeOverride(Size arrangeBounds) |
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect) |
at System.Windows.UIElement.Arrange(Rect finalRect) |
at System.Windows.ContextLayoutManager.UpdateLayout() |
at System.Windows.UIElement.UpdateLayout() |
at Telerik.Windows.Controls.GridView.GridViewDataControl.ItemsSourceChanged(Boolean sourceChanged) |
at Telerik.Windows.Controls.GridView.GridViewDataControl.OnItemsChanged(NotifyCollectionChangedEventArgs e) |
at Telerik.Windows.Controls.GridView.BaseItemsControl.OnItemCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e) |
at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e) |
at Telerik.Windows.Data.DataItemCollection.OnCollectionChanged(NotifyCollectionChangedEventArgs e) |
at Telerik.Windows.Data.DataItemCollection.Telerik.Windows.Data.IWeakEventListener<System.Collections.Specialized.NotifyCollectionChangedEventArgs>.ReceiveWeakEvent(Object sender, NotifyCollectionChangedEventArgs e) |
at Telerik.Windows.Data.WeakEvent.WeakListener`1.Handler(Object sender, TArgs args) |
at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e) |
at Telerik.Windows.Data.QueryableCollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args) |
at Telerik.Windows.Data.QueryableCollectionView.RefreshOverride() |
at Telerik.Windows.Data.QueryableCollectionView.RefreshOrDefer() |
at Telerik.Windows.Data.QueryableCollectionView.ProcessSynchronousCollectionChanged(NotifyCollectionChangedEventArgs args) |
at Telerik.Windows.Data.QueryableCollectionView.ProcessCollectionChanged(NotifyCollectionChangedEventArgs args) |
at Telerik.Windows.Data.QueryableCollectionView.OnSourceCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args) |
at Telerik.Windows.Data.QueryableCollectionView.Telerik.Windows.Data.IWeakEventListener<System.Collections.Specialized.NotifyCollectionChangedEventArgs>.ReceiveWeakEvent(Object sender, NotifyCollectionChangedEventArgs args) |
at Telerik.Windows.Data.WeakEvent.WeakListener`1.Handler(Object sender, TArgs args) |
at System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e) |
at System.Collections.ObjectModel.ObservableCollection`1.ClearItems() |
at System.Collections.ObjectModel.Collection`1.Clear() |
at MAVO.Extension.LearningCenter.Client.Windows.Pages.LearningCenter.Shared.UserSearch.bw_UpdateSearch_RunWorkerCompleted(Object sender, RunWorkerCompletedEventArgs e) |
at System.ComponentModel.BackgroundWorker.OnRunWorkerCompleted(RunWorkerCompletedEventArgs e) |
at System.ComponentModel.BackgroundWorker.AsyncOperationCompleted(Object arg) |
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) |
<Style x:Key="GridRowStyle" TargetType="telerik:GridViewRow" |
<Style.Triggers> |
<DataTrigger Binding="{Binding Path=category}" Value="1"> |
<Setter Property="Background" Value="#FFFF88" /> |
</DataTrigger> |
</Style.Triggers> |
</Style> |
//In grid I use: |
RowStyle="{StaticResource GridRowStyle}" |
We are using context menu with tree node. The tree and context menu are both dynamic and binds on the runtime.
The tree has several levels of nodes and context menu is specific to the nodes at different levels.
The tree supports the multiple selection.
As per our requirement, we need to find multiple selected tree nodes when the user right clicks on any one of the mulitple selected node to open the context menu.
1. Single node selection
When we right click on the single node to open the context menu, the node which was right clicked does not get selected. We have used the following piece of code to identify the node which was right clicked, and it gives us the correct value.
private RadTreeViewItem ClickedTreeViewItem
{
get
{
return radContextMenu.GetClickedElement<RadTreeViewItem>(); }
}
this
.ClickedTreeViewItem.DataContext
2. Multiple nodes selection
In case of multiple selection, we have to select the nodes and we are not able to find the nodes which are selected while using the context menu.
To summarize:
1. We need a way to find the selected nodes in a tree on right click to open the context menu for either single or multiple selection of the tree view item.
2. The node on which the context menu was opened should be selected as well.
<telerik:GridViewDataColumn Header="X Coordinates" |
DataMemberBinding="{Binding XCoordinates, Mode=TwoWay}" |
TextAlignment="Right"> |
<telerik:GridViewDataColumn.CellTemplate> |
<DataTemplate> |
<TextBlock Text="{Binding XCoordinates}" /> |
</DataTemplate> |
</telerik:GridViewDataColumn.CellTemplate> |
<telerik:GridViewDataColumn.CellEditTemplate> |
<DataTemplate> |
<telerik:RadNumericUpDown Maximum="10000" Minimum="0" ValueFormat="Numeric" |
Value="{Binding XCoordinates, Mode=TwoWay}" /> |
</DataTemplate> |
</telerik:GridViewDataColumn.CellEditTemplate> |
</telerik:GridViewDataColumn> |
ObservableCollection<People> peopleByYearData = GetPeopleByYear();
gridViewPeople.ItemsSource = peopleByYearData;
//this displays the data on a simple bar chart.
chartPeopleByYear.ItemsSource = gridViewPeople.ItemsSource;
How do i ensure that the chart updates its view when the gridview is filtered?
i have tried hooking into the Filtered event of the gridview to try and get access to a list of filtered items but I cannot find any such list. The filter displays fine on the gridview but in the Filtered event the gridViewPeople.Items.Count is always == 0.
Thanks