Object reference not set to an instance of an object.
at Telerik.Windows.Controls.DragDrop.RadDragAndDropManager.FindRootVisual() at Telerik.Windows.Controls.DragDrop.RadDragAndDropManager.Initialize() at Telerik.Windows.Controls.DragDrop.RadDragAndDropManager.OnAllowDragChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e) at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e) at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e) at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args) at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, OperationType operationType) at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, OperationType operationType, Boolean isInternal) at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value) at Telerik.Windows.Controls.DragDrop.RadDragAndDropManager.SetAllowDrag(DependencyObject obj, Boolean value) at Telerik.Windows.Controls.RadTileViewItem.OnApplyTemplate() at System.Windows.FrameworkElement.ApplyTemplate() at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at System.Windows.Controls.Canvas.MeasureOverride(Size constraint) at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint) at System.Windows.Controls.ItemsPresenter.MeasureOverride(Size constraint) at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at System.Windows.Controls.Control.MeasureOverride(Size constraint) at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV) at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV) at System.Windows.Controls.Grid.MeasureOverride(Size constraint) at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint) at System.Windows.Controls.ContentPresenter.MeasureOverride(Size constraint) at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at System.Windows.Controls.Border.MeasureOverride(Size constraint) at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at System.Windows.Controls.Control.MeasureOverride(Size constraint) at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at MS.Internal.Designer.SimpleViewManager.DesignerBackground.MeasureOverride(Size constraint) at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at System.Windows.Controls.Decorator.MeasureOverride(Size constraint) at Microsoft.Windows.Design.Interaction.DesignerView.MeasureOverride(Size constraint) at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at MS.Internal.Designer.Viewport.MeasureOverride(Size availableSize) at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint) at System.Windows.Controls.ScrollContentPresenter.MeasureOverride(Size constraint) at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV) at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV) at System.Windows.Controls.Grid.MeasureOverride(Size constraint) at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at System.Windows.Controls.ScrollViewer.MeasureOverride(Size constraint) at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at System.Windows.Controls.Grid.MeasureOverride(Size constraint) at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint) at System.Windows.Controls.ContentPresenter.MeasureOverride(Size constraint) at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at System.Windows.Controls.Control.MeasureOverride(Size constraint) at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at System.Windows.Interop.HwndSource.SetLayoutSize() at System.Windows.Interop.HwndSource.set_RootVisualInternal(Visual value) at System.Windows.Interop.HwndSource.set_RootVisual(Visual value) at MS.Internal.Designer.VSIsolatedDesigner.ViewHolder.Initialize() at MS.Internal.Designer.VSIsolatedDesigner.ViewHolder..ctor(UIElement content) at MS.Internal.Designer.VSIsolatedDesigner.VSIsolatedView.get_ViewHandle() at MS.Internal.Host.Isolation.IsolatedView.get_ViewHandle() at MS.Internal.Designer.DesignerPane.LoadDesignerView()
My TileView's XAML is this:
<NavigationControls:RadTileView Grid.ColumnSpan="4" Name="radTileView1" Grid.Row="1" |
Margin="5" Width="800" Height="450" MinimizedColumnWidth="150"> |
<NavigationControls:RadTileViewItem> |
<NavigationControls:RadTileViewItem.Header> |
<TextBlock Text="Vehículo header"></TextBlock> |
</NavigationControls:RadTileViewItem.Header> |
<NavigationControls:RadTileViewItem.Content> |
<Controls:RadFluidContentControl AnimationControls:AnimationManager.IsAnimationEnabled="True" |
SmallToNormalThreshold="291,130" |
NormalToSmallThreshold="292,131" |
NormalToLargeThreshold="735,350" |
LargeToNormalThreshold="731,351"> |
<Controls:RadFluidContentControl.SmallContent> |
<TextBlock Text="Vehículo small"></TextBlock> |
</Controls:RadFluidContentControl.SmallContent> |
<Controls:RadFluidContentControl.Content> |
<TextBlock Text="Vehículo content"></TextBlock> |
</Controls:RadFluidContentControl.Content> |
<Controls:RadFluidContentControl.LargeContent> |
<TextBlock Text="Vehículo large"></TextBlock> |
</Controls:RadFluidContentControl.LargeContent> |
</Controls:RadFluidContentControl> |
</NavigationControls:RadTileViewItem.Content> |
</NavigationControls:RadTileViewItem> |
<NavigationControls:RadTileViewItem> |
<NavigationControls:RadTileViewItem.Header> |
<TextBlock Text="Empresa header"></TextBlock> |
</NavigationControls:RadTileViewItem.Header> |
<NavigationControls:RadTileViewItem.Content> |
<Controls:RadFluidContentControl AnimationControls:AnimationManager.IsAnimationEnabled="True" |
SmallToNormalThreshold="291,130" |
NormalToSmallThreshold="292,131" |
NormalToLargeThreshold="735,350" |
LargeToNormalThreshold="731,351"> |
<Controls:RadFluidContentControl.SmallContent> |
<TextBlock Text="Empresa small"></TextBlock> |
</Controls:RadFluidContentControl.SmallContent> |
<Controls:RadFluidContentControl.Content> |
<TextBlock Text="Empresa content"></TextBlock> |
</Controls:RadFluidContentControl.Content> |
<Controls:RadFluidContentControl.LargeContent> |
<TextBlock Text="Empresa large"></TextBlock> |
</Controls:RadFluidContentControl.LargeContent> |
</Controls:RadFluidContentControl> |
</NavigationControls:RadTileViewItem.Content> |
</NavigationControls:RadTileViewItem> |
</NavigationControls:RadTileView> |
Could there be anything I'm missing? Thanks.