How can I bind the Expander’s header element’s Width to the ActualWidth of the Expander ?
This can be done with the following code snippet.
How can I replace the style of a DocumentViewer ?
This can be done with the following code snippets, Define the required styles in the App.xaml file. [XAML] <Style x:Key=”MyDVStyleExtend1″ BasedOn=”{StaticResource {x:Type DocumentViewer}}” TargetType=”{x:Type DocumentViewer}”> <Setter Property=”Background”> <Setter.Value> <LinearGradientBrush StartPoint=”0.5,0″ EndPoint=”0.5,1″> <GradientStop Offset=”0.0″ Color=”Red” /> <GradientStop Offset=”1.0″ Color=”White” /> </LinearGradientBrush> </Setter.Value> </Setter> </Style> <Style x:Key=”MyDVStyleExtend2″ BasedOn=”{StaticResource {x:Type DocumentViewer}}” TargetType=”{x:Type DocumentViewer}”> <Setter Property=”Background”> <Setter.Value> <LinearGradientBrush StartPoint=”0.5,0″ EndPoint=”0.5,1″> <GradientStop Offset=”0.0″ Color=”Blue” /> <GradientStop Offset=”1.0″ Color=”White” /> </LinearGradientBrush> </Setter.Value> </Setter> </Style> Define the DocumentViewer in MainWindow. [XAML] <Grid> <DocumentViewer Name=”MyDocumentViewer”/> <Button Content=”Style1″ Height=”30″ Width=”100″ Click=”Button1_Click” /> <Button Content=”Style2″ Height=”30″ Width=”100″ Click=”Button2_Click” /> </Grid> Replace the styles for document viewer based on button clicks from main window. [C#] private void Button1_Click(object sender, RoutedEventArgs e) { MyDocumentViewer.Style = (Style)Application.Current.Resources[‘MyDVStyleExtend1’]; } private void Button2_Click(object sender, RoutedEventArgs e) { MyDocumentViewer.Style = (Style)Application.Current.Resources[‘MyDVStyleExtend2’]; }
How can I animate the thickness of a border by using ThicknessAnimation ?
The following example animates the thickness of a border by using the ‘ThicknessAnimation’ property. The example uses the ’BorderThickness’ property of Border. [XAML] <!– an animation on the BorderThickness property of a Border. –> <Page xmlns=’http://schemas.microsoft.com/winfx/2006/xaml/presentation’ xmlns:x=’http://schemas.microsoft.com/winfx/2006/xaml’ > <StackPanel Orientation=’Vertical’ HorizontalAlignment=’Center’> <Border Background=’#99FFFFFF’ BorderBrush=’#CCCCFF’ BorderThickness=’1′ Margin=’0,60,0,20′ Padding=’20’ > <Border.Triggers> <EventTrigger RoutedEvent=’Border.Loaded’> <BeginStoryboard> <Storyboard> <!– BorderThickness animates from left=1, right=1, top=1, and bottom=1 to left=28, right=28, top=14, and bottom=14 over one second. –> <ThicknessAnimation Storyboard.TargetProperty=’BorderThickness’ Duration=’0:0:1.5′ FillBehavior=’HoldEnd’ From=’1,1,1,1′ To=’28,14,28,14′ /> </Storyboard> </BeginStoryboard> </EventTrigger> </Border.Triggers> <TextBlock> This example shows how to use the ThicknessAnimation to create an animation on the BorderThickness property of a Border. </TextBlock> </Border> </StackPanel> </Page>
How can I crop an Image ?
Cropping images is done with the Image.Clip property. For this, use the following code snippets. [XAML] <Image Source=”Test.png”> <Image.Clip> <EllipseGeometry Center=”120,140″ RadiusX=”150″ RadiusY=”150″ /> </Image.Clip> <Image> Reference link: https://www.c-sharpcorner.com/uploadfile/mahesh/clipping-or-cropping-images-in-wpf/
How do I make the Expander button to be justified to the right, rather than the left which is the default ?
If you require justifying the Expander button to the right, you need to set the FlowDirection property to RightToLeft. Note: If you set the FlowDirection to RightToLeft, the content of the expander will also be moved to RightToLeft justification. In order to avoid this, you can set the flow direction to expander content. This can be done with the following code snippets, [XAML] <Expander FlowDirection=”RightToLeft”> <Expander.Header> <TextBlock Text=”Expander header content” Background=”AliceBlue” Width=”{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type Expander}}, Path=ActualWidth}”/> </Expander.Header> <Grid FlowDirection=”LeftToRight”> <TextBlock Background=”Gray” Text=”Expander body content”/> </Grid> </Expander>