Questions on UI for WPF Forum

4 answers

316 views

Do I have to wrapping something with <AdornerDecorator>?

I have a customized cell template.

<telerik:GridViewDataColumn Header="Contact" DataMemberBinding="{Binding CustAccountsLocationContact.FirstName}">

<telerik:GridViewDataColumn.CellTemplate>

<DataTemplate>

<TextBox Text="{Binding SomeText, ValidatesOnDataErrors=True, UpdateSourceTrigger=PropertyChanged}" />

</DataTemplate>

</telerik:GridViewDataColumn.CellTemplate>

</telerik:GridViewDataColumn>

Now in Model class SomeText property there is a [required] attribute. Similar this, I created the error template as

<ControlTemplate x:Key="errorTemplate">

<DockPanel>

<Border BorderBrush="Red" BorderThickness="1">

<AdornedElementPlaceholder x:Name="controlWithError"/>

</Border>

<TextBlock Foreground="Red" FontSize="20" FontFamily="Segoe UI" Margin="3,0,0,0" MouseDown="Exclamation_MouseDown" Tag="{Binding AdornedElement.(Validation.Errors)[0].ErrorContent, ElementName=controlWithError}">!</TextBlock>

</DockPanel>

</ControlTemplate>

However I can not see the error template if validation failed. By the answer on stackoverflow, it seems need to wrap some template with <AdornerDecorator>

Is it the solution to my case? If so, how to wrap it around telerik control?

Thank you.

GridView

answered on 03 Sep 2018

1 answer

93 views

Bug when selecting "This PC"

Hello,

In the SaveFileDialog, when the user selects "This PC" on the folders tree, the files list doesn't change.

On the windows save file dialog, the list of devices and drives is displayed.

FileDialogs

answered on 03 Sep 2018

1 answer

190 views

Sort and Filter with ICollectionView

Hi,

in the SDK sample, there is a "GridSorting" project which sort on the original collection

How can I implement sorting and filtering using ICollectionView (sort the parent task, and children task also)

The attached is the sample project with basic implementation of sort with ICollectionView, which is not working

Thanks and Best regards

GanttView

answered on 31 Aug 2018

6 answers

644 views

MaxLength for RadNumericUpDown

Hello, is it possible to set a MaxLength to the RadNumericUpDown so the user can't input more than the allowed number? (Exactly like the WPF TextBox), I tried the code below but it didn't work since ContentText is readonly:

private

void textBoxWidth_KeyDown(object sender, KeyEventArgs e)

{

if (textBoxWidth.ContentText.Length > 1)

{

textBoxWidth.ContentText = 9;

textBoxWidth.Value = 9;

}

}

Thanks.

NumericUpDown

answered on 31 Aug 2018

3 answers

383 views

Upgrade Wizard Creates lib Directory

Can you explain to me the purpose of creating the lib directory during an upgrade? This seems to be a new way of operating and it creates havoc with the projects that are shared between multiple solutions. If I upgrade solution 1 it creates all the reference files then updates the references for project 1 pointing to that directory. If I upgrade solution it creates another set of the same files but now project 1 points to the new directory. Shouldn't it just point to the GAC reference?

Also, this means that every solution ends up adding the same files to Source control because "everything in this directory" belongs in there.

General Discussions

answered on 31 Aug 2018

1 answer

153 views

Issue using SpellChecker with RadRichTextBox

Hi,

I have a WPF application with SpellChecker integrated with RadRichTextBox. The Richtextbox has a long content and is displayed in multiple pages and i need to achieve the below 3 things

1) SpellChecker highlights the word that needs to be changed but it does not not properly scroll to the next mispelled word which is on the next page.

2) The 'Not in Dictionary' section of the SpellChecker does not allow editing the wording there itself similar to MS Word.

3) SpellChcker not not go to the top of the page if we are at the bottom of the page.

Please help on how to achieve this.

RichTextBox

answered on 31 Aug 2018

4 answers

220 views

Custom RadDiagramConnector Shape and XML Diagram Serialization

Hi Telerik,

I'm using a RadDiagram with a custom RadDiagramConnection :

<Style TargetType="diagramscontrols:RadDiagramConnection" x:Key="RadDiagramConnectionStyle_RotateText">

<Setter Property="StrokeThickness" Value="1"/>

<Setter Property="HorizontalContentAlignment" Value="Stretch"/>

<Setter Property="VerticalContentAlignment" Value="Stretch"/>

<Setter Property="FocusVisualStyle" Value="{x:Null}"/>

<Setter Property="Template">

<Setter.Value>

<ControlTemplate TargetType="telerik:RadDiagramConnection">

<Grid x:Name="RootTemplate" MinHeight="0" HorizontalAlignment="Stretch">

<VisualStateManager.VisualStateGroups>

<VisualStateGroup x:Name="SelectionStates">

<VisualState x:Name="Selected"/>

<VisualState x:Name="SelectedInGroup">

<Storyboard>

<ObjectAnimationUsingKeyFrames Storyboard.TargetName="SelectedInGroupPath" Storyboard.TargetProperty="Visibility" Duration="0">

<DiscreteObjectKeyFrame KeyTime="0">

<DiscreteObjectKeyFrame.Value>

<Visibility>Visible</Visibility>

</DiscreteObjectKeyFrame.Value>

</DiscreteObjectKeyFrame>

</ObjectAnimationUsingKeyFrames>

</Storyboard>

</VisualState>

<VisualState x:Name="Unselected"/>

<VisualState x:Name="SelectedAsGroup"/>

</VisualStateGroup>

<VisualStateGroup x:Name="EditMode">

<VisualState x:Name="NormalMode"/>

<VisualState x:Name="NormalEditMode">

<Storyboard>

<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="NormalContent" Storyboard.TargetProperty="Visibility">

<DiscreteObjectKeyFrame KeyTime="0">

<DiscreteObjectKeyFrame.Value>

<Visibility>Collapsed</Visibility>

</DiscreteObjectKeyFrame.Value>

</DiscreteObjectKeyFrame>

</ObjectAnimationUsingKeyFrames>

<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="EditContent" Storyboard.TargetProperty="Visibility">

<DiscreteObjectKeyFrame KeyTime="0">

<DiscreteObjectKeyFrame.Value>

<Visibility>Visible</Visibility>

</DiscreteObjectKeyFrame.Value>

</DiscreteObjectKeyFrame>

</ObjectAnimationUsingKeyFrames>

</Storyboard>

</VisualState>

<VisualState x:Name="TextBoxEditMode">

<Storyboard>

<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="NormalContent" Storyboard.TargetProperty="Visibility">

<DiscreteObjectKeyFrame KeyTime="0">

<DiscreteObjectKeyFrame.Value>

<Visibility>Collapsed</Visibility>

</DiscreteObjectKeyFrame.Value>

</DiscreteObjectKeyFrame>

</ObjectAnimationUsingKeyFrames>

<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="EditTextBox" Storyboard.TargetProperty="Visibility">

<DiscreteObjectKeyFrame KeyTime="0">

<DiscreteObjectKeyFrame.Value>

<Visibility>Visible</Visibility>

</DiscreteObjectKeyFrame.Value>

</DiscreteObjectKeyFrame>

</ObjectAnimationUsingKeyFrames>

</Storyboard>

</VisualState>

</VisualStateGroup>

</VisualStateManager.VisualStateGroups>

<Path x:Name="DeferredPath"

Stroke="{TemplateBinding Stroke}"

Opacity="0.7"

Fill="{TemplateBinding Background}"

StrokeThickness="{TemplateBinding StrokeThickness}"

StrokeDashArray="2 2"/>

<Path x:Name="SelectedInGroupPath" Visibility="Collapsed" Stroke="Green" />

<Path Stroke="{TemplateBinding Stroke}"

Fill="{TemplateBinding Background}"

StrokeThickness="{TemplateBinding StrokeThickness}"

x:Name="GeometryPath"

StrokeDashArray="{TemplateBinding StrokeDashArray}"/>

<Grid x:Name="EdittingElement" RenderTransformOrigin="0.5 0.5" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">

<Grid.LayoutTransform>

<RotateTransform>

<RotateTransform.Angle>

<MultiBinding Converter="{StaticResource PointsToAngleConverter}">

<Binding Path="StartPoint" RelativeSource="{RelativeSource AncestorType=telerik:RadDiagramConnection}" />

<Binding Path="EndPoint" RelativeSource="{RelativeSource AncestorType=telerik:RadDiagramConnection}" />

<Binding ElementName="DeferredPath" Path="Data" />

</MultiBinding>

</RotateTransform.Angle>

</RotateTransform>

</Grid.LayoutTransform>

<Border Background="Transparent"/>

<TextBlock x:Name="NormalContent" Foreground="{TemplateBinding Foreground}" FontFamily="{TemplateBinding FontFamily}" FontSize="{TemplateBinding FontSize}"

Text="{TemplateBinding Content}" TextAlignment="{Binding Tag.TextAlignement, RelativeSource={RelativeSource AncestorType=diagramscontrols:RadDiagramConnection}}"

HorizontalAlignment=

"{Binding Tag.HorizontalTextAlignement, RelativeSource={RelativeSource AncestorType=diagramscontrols:RadDiagramConnection}}"

VerticalAlignment="Center">

<TextBlock.Margin>

<MultiBinding Converter="{StaticResource MarginConverter}">

<Binding Path="StartPoint" RelativeSource="{RelativeSource AncestorType=telerik:RadDiagramConnection}" />

<Binding Path="EndPoint" RelativeSource="{RelativeSource AncestorType=telerik:RadDiagramConnection}" />

<Binding Path="ActualHeight" RelativeSource="{RelativeSource Self}" />

</MultiBinding>

</TextBlock.Margin>

</TextBlock>

<ContentPresenter x:Name="EditContent" Visibility="Collapsed" Content="{TemplateBinding Content}" ContentTemplate="{TemplateBinding EditTemplate}"/>

<TextBox x:Name="EditTextBox" Visibility="Collapsed">

<TextBox.InputBindings>

<KeyBinding Key="Enter" Command="ApplicationCommands.NotACommand"/>

</TextBox.InputBindings>

</TextBox>

</Grid>

</ControlTemplate>

</Setter.Value>

</Setter>

</Style>

To save my diagram, I'm using this code :

Dim pathDiagram As String = myDiagram.Save()

Dim xml_doc As XDocument = XDocument.Parse(pathDiagram)

The problem is that I want to save the HorizontalAlignement of the text in my custom RadDiagramConnection, and I don't know how I can do this.

For custom TextShape, the HorizontalAlignement is saved, like in the attached picture.

Do you know how I can add the save of HorizontalAlignement property during Diagram saving ?

Thank you.

Valentin.

Diagram

answered on 31 Aug 2018

18 answers

447 views

RadGridView ControlPanelItems Binding Error

Hi All,

I created a custom gridview which inherit from radgridview. And I have a ControlPanelItem which include a toggle button, The button has IsFilteringAllowed property. It works correctly when the gridview Visible.

But when the gridview initially collapsed a binding error occured in output.

"Cannot find source for binding with reference 'ElementName=grid'. BindingExpression:Path=IsFilteringAllowed; DataItem=null; target element is 'ToggleButton' (Name=''); target property is 'IsChecked' (type 'Nullable`1')"

This is my control xaml

this is xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace DemoApplication
{
/// <summary>
/// Interaction logic for CustomGridView.xaml
/// </summary>
public partial class CustomGridView : UserControl
{
public CustomGridView()
{
InitializeComponent();
}
//
// Summary:
// Gets or sets a value indicating whether the control can be filtered through
// the UI.

public static readonly DependencyProperty IsFilteringAllowedProperty =
DependencyProperty.Register("IsFilteringAllowed", typeof(Boolean), typeof(CustomGridView));

public Boolean IsFilteringAllowed
{
get { return (Boolean)GetValue(IsFilteringAllowedProperty); }
set { SetValue(IsFilteringAllowedProperty, value); }
}
}
}

</Grid>
</UserControl>

and this is my view

Thanks

GridView

answered on 31 Aug 2018

3 answers

624 views

ControlPanelItem with buttons

Hi,

on my data grids I have implemented the functionality to do an save and load the layout, reset the layout to default and to do an export to Excel. This is done by a ContextMenu defined in a style, which works fine.

<Setter Property="ContextMenu">
<Setter.Value>
<ContextMenu>
<MenuItem Header="Export to Excel" Command="{Binding ExportToExcelCmd}" CommandParameter="{Binding Path=PlacementTarget, RelativeSource={RelativeSource Mode=FindAncestor, AncestorLevel=1, AncestorType={x:Type ContextMenu}}}">
<MenuItem.Icon>
<Image Source="/Resources/Icons/Excel.png" />
</MenuItem.Icon>
</MenuItem>
<MenuItem Header="Save grid layout" Command="{Binding SaveDataGridLayoutCmd}" CommandParameter="{Binding Path=PlacementTarget, RelativeSource={RelativeSource Mode=FindAncestor, AncestorLevel=1, AncestorType={x:Type ContextMenu}}}">
<MenuItem.Icon>
<Image Source="/Resources/Icons/Save.png" />
</MenuItem.Icon>
</MenuItem>
<MenuItem Header="Load grid layout" Command="{Binding LoadDataGridLayoutCmd}" CommandParameter="{Binding Path=PlacementTarget, RelativeSource={RelativeSource Mode=FindAncestor, AncestorLevel=1, AncestorType={x:Type ContextMenu}}}">
<MenuItem.Icon>
<Image Source="/Resources/Icons/Refresh.png" />
</MenuItem.Icon>
</MenuItem>
<MenuItem Header="Reset grid layout" Command="{Binding ResetDataGridLayoutCmd}" CommandParameter="{Binding Path=PlacementTarget, RelativeSource={RelativeSource Mode=FindAncestor, AncestorLevel=1, AncestorType={x:Type ContextMenu}}}">
<MenuItem.Icon>
<Image Source="/Resources/Icons/Refresh.png" />
</MenuItem.Icon>
</MenuItem>
</ContextMenu>
</Setter.Value>
</Setter>
Recently I discoverd the ControlPanel control. I copied/paste the code from the demo to implement the show/hide columns feature. Now I would like to switch from the above ContextMenu to a ControlPanel with buttons for each action:

<telerik:ControlPanelItemCollection>
<telerik:ControlPanelItem ButtonTooltip="Column chooser" >
<telerik:ControlPanelItem.ContentTemplate>
<DataTemplate>
<ListBox ItemsSource="{Binding Columns}" BorderThickness="0">
<ListBox.ItemTemplate>
<DataTemplate>
<CheckBox Content="{Binding Header, Mode=OneWay}" IsChecked="{Binding IsVisible, Mode=TwoWay}" />
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</DataTemplate>
</telerik:ControlPanelItem.ContentTemplate>
</telerik:ControlPanelItem>

<telerik:ControlPanelItem ButtonTooltip="Save/Load layout" >
<telerik:ControlPanelItem.Content>
<ListBox>
<Button Content="Export to Excel" Command="{Binding ExportToExcelCmd}" CommandParameter="{Binding ?"/>
<Button Content="Save grid layout" Command="{Binding SaveDataGridLayoutCmd}" CommandParameter="{Binding ?}"/>
<Button Content="Load grid layout" Command="{Binding LoadDataGridLayoutCmd}" CommandParameter="{Binding ?}"/>
<Button Content="Reset grid layout" Command="{Binding ResetDataGridLayoutCmd}" CommandParameter="{Binding ?}"/>
</ListBox>
</telerik:ControlPanelItem.Content>
</telerik:ControlPanelItem>

But I'm stuck with the binding of the Command. As I'm using the MVVM pattern, the Command is bound to a command in my ViewModel. This works fine for the ContextMenu, but not for the ControlPanel.

Also, the datagrid itself needs to be send as a parameter with the command and I'm not sure how to do this.

Any help would be much appreciated.

Regards,

Hans

GridView

answered on 31 Aug 2018

6 answers

309 views

Recursive Call To Automation Peer Error

So myself and another developer are working on the same program. On my computer, everything works fine. On his in development mode, or on others at run time, I get this error. I have seen this error on other posts but they look fairly dated and take care of. Anyone else have issues with this?

at System.Windows.Automation.Peers.AutomationPeer.GetChildren()
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.ValidateConnected(AutomationPeer connectedPeer)
at MS.Internal.Automation.ElementProxy.StaticWrap(AutomationPeer peer, AutomationPeer referencePeer)
at System.Windows.Automation.Peers.AutomationPeer.UpdateChildrenInternal(Int32 invalidateLimit)
at System.Windows.Automation.Peers.AutomationPeer.UpdateChildren()
at System.Windows.Automation.Peers.AutomationPeer.ResetChildrenCache()
at Telerik.Windows.Automation.Peers.RadTabControlAutomationPeer.GetChildrenCore()
at System.Windows.Automation.Peers.AutomationPeer.EnsureChildren()
at System.Windows.Automation.Peers.AutomationPeer.GetChildren()
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.ValidateConnected(AutomationPeer connectedPeer)
at MS.Internal.Automation.ElementProxy.StaticWrap(AutomationPeer peer, AutomationPeer referencePeer)
at System.Windows.Automation.Peers.AutomationPeer.ProviderFromPeer(AutomationPeer peer)
at System.Windows.Automation.Peers.AutomationPeer.RaiseAutomationEvent(AutomationEvents eventId)
at System.Windows.Automation.Peers.SelectorAutomationPeer.RaiseSelectionEvents(SelectionChangedEventArgs e)
at System.Windows.Controls.ListBox.OnSelectionChanged(SelectionChangedEventArgs e)
at System.Windows.Controls.Primitives.Selector.InvokeSelectionChanged(List`1 unselectedInfos, List`1 selectedInfos)
at System.Windows.Controls.Primitives.Selector.SelectionChanger.End()
at System.Windows.Controls.Primitives.Selector.SelectionChanger.SelectJustThisItem(ItemInfo info, Boolean assumeInItemsCollection)
at System.Windows.Controls.Primitives.Selector.SetSelectedToCurrent()
at System.Windows.Controls.Primitives.Selector.OnItemsChanged(NotifyCollectionChangedEventArgs e)
at System.Windows.Controls.ItemsControl.OnItemCollectionChanged2(Object sender, NotifyCollectionChangedEventArgs e)
at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)
at System.Windows.Data.CollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
at System.Windows.Controls.ItemCollection.OnViewCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)
at System.Windows.WeakEventManager.ListenerList`1.DeliverEvent(Object sender, EventArgs e, Type managerType)
at System.Windows.WeakEventManager.DeliverEvent(Object sender, EventArgs args)
at System.Collections.Specialized.CollectionChangedEventManager.OnCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args)
at System.Windows.Data.CollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
at System.Windows.Data.ListCollectionView.RefreshOverride()
at System.Windows.Data.CollectionView.RefreshInternal()
at System.Windows.Data.CollectionView.Refresh()
at System.Windows.Data.CollectionView.EndDefer()
at System.Windows.Data.CollectionView.DeferHelper.Dispose()
at System.Windows.Controls.ItemCollection.SetCollectionView(CollectionView view)
at System.Windows.Controls.ItemCollection.SetItemsSource(IEnumerable value, Func`2 GetSourceItem)
at System.Windows.Controls.ItemsControl.OnItemsSourceChanged(DependencyObject d, 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, Boolean coerceWithCurrentValue, OperationType operationType)
at System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp, Boolean preserveCurrentValue)
at System.Windows.Data.BindingExpressionBase.Invalidate(Boolean isASubPropertyChange)
at System.Windows.Data.BindingExpression.TransferValue(Object newValue, Boolean isASubPropertyChange)
at System.Windows.Data.BindingExpression.Activate(Object item)
at System.Windows.Data.BindingExpression.AttachToContext(AttachAttempt attempt)
at System.Windows.Data.BindingExpression.MS.Internal.Data.IDataBindEngineClient.AttachToContext(Boolean lastChance)
at MS.Internal.Data.DataBindEngine.Task.Run(Boolean lastChance)
at MS.Internal.Data.DataBindEngine.Run(Object arg)
at MS.Internal.Data.DataBindEngine.OnLayoutUpdated(Object sender, EventArgs e)
at System.Windows.ContextLayoutManager.fireLayoutUpdateEvent()
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, Int32 numArgs)
at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
at System.Windows.Threading.DispatcherOperation.InvokeImpl()
at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Windows.Threading.DispatcherOperation.Invoke()
at System.Windows.Threading.Dispatcher.ProcessQueue()
at System.Windows.Threading.Dispatcher.WndProcHook(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..

TabControl

answered on 31 Aug 2018