Programmatically Extract an Element's Style with DefaultStyleKeyProperty : UI Element « Windows Presentation Foundation « VB.Net





Programmatically Extract an Element's Style with DefaultStyleKeyProperty

Programmatically Extract an Element's Style with DefaultStyleKeyProperty
     

<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="WPF" Height="120" Width="220">
    <Window.Resources>
        <Style x:Key="CustomProgressBarStyle" TargetType="{x:Type ProgressBar}">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type ProgressBar}">
                        <Grid>
                            <Border Name="PART_Track" Background="{DynamicResource {x:Static SystemColors.InactiveCaptionBrushKey}}"                          
                            BorderBrush="{DynamicResource {x:Static SystemColors.InactiveBorderBrushKey}}"                          
                            BorderThickness="1" />
                        </Grid>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

    </Window.Resources>

    <StackPanel>
        <ProgressBar x:Name="MyProgressBar" Value="30" Width="200" HorizontalAlignment="Center" Style="{DynamicResource CustomProgressBarStyle}"/>
        <Button Click="Button_Click" Content="Extract Style"/>
    </StackPanel>

</Window>

//File:Window.xaml.vb

Imports System
Imports System.Reflection
Imports System.Windows
Imports System.Windows.Markup

Namespace WpfApplication1
  Public Partial Class Window1
    Inherits Window
    Public Sub New()
      InitializeComponent()
    End Sub

    Private Sub Button_Click(sender As Object, e As RoutedEventArgs)
      Dim type As Type = GetType(FrameworkElement)
      Dim fieldInfo As FieldInfo = type.GetField("DefaultStyleKeyProperty", BindingFlags.[Static] Or BindingFlags.NonPublic)

      Dim defaultStyleKeyProperty As DependencyProperty = DirectCast(fieldInfo.GetValue(MyProgressBar), DependencyProperty)

      Dim defaultStyleKey As Object = MyProgressBar.GetValue(defaultStyleKeyProperty)
      Dim style As Style = DirectCast(Application.Current.FindResource(defaultStyleKey), Style)
      Dim styleXaml As String = XamlWriter.Save(style)
      Console.WriteLine(styleXaml)
    End Sub
  End Class
End Namespace

   
    
    
    
    
  










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