Clear locally set values and restore the default values of dependency properties : UI Element « Windows Presentation Foundation « VB.Net Tutorial

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VB.Net Tutorial » Windows Presentation Foundation » UI Element 
16.50.2.Clear locally set values and restore the default values of dependency properties
<StackPanel Name="root"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  x:Class="WpfApplication1.DPClearValue">
    <StackPanel.Resources>
      <Style TargetType="Button">
        <Setter Property="Height" Value="20"/>
        <Setter Property="Width" Value="250"/>
        <Setter Property="HorizontalAlignment" Value="Left"/>
      </Style>
      <Style TargetType="Ellipse">
        <Setter Property="Height" Value="50"/>
        <Setter Property="Width" Value="50"/>
        <Setter Property="Fill" Value="Black"/>
      </Style>
      <Style TargetType="Rectangle">
        <Setter Property="Height" Value="50"/>
        <Setter Property="Width" Value="50"/>
        <Setter Property="Fill" Value="Blue"/>
      </Style>
      <Style TargetType="Polygon">
        <Setter Property="Points" Value="10,60 60,60 60,10"/>
        <Setter Property="Fill" Value="Blue"/>
      </Style>
      <Style x:Key="ShapeStyle" TargetType="Shape">
        <Setter Property="Fill" Value="Red"/>
      </Style>
    </StackPanel.Resources>
  <DockPanel Name="myDockPanel">
    <Ellipse Height="100"  Width="100" Style="{StaticResource ShapeStyle}"/>
    <Rectangle Height="100" Width="100"  Style="{StaticResource ShapeStyle}" />
    <Polygon Points="10,110 110,110 110,10" Style="{StaticResource ShapeStyle}"/>
  </DockPanel>
    <Button Name="RedButton" Click="MakeEverythingRed">Make everything red</Button>
    <Button Name="ClearButton" Click="RestoreDefaultProperties">
  Clear local values
  </Button>

</StackPanel>

//File:Window.xaml.vb


Imports System.Windows
Imports System.Collections
Imports System.Windows.Media
Imports System.Windows.Controls
Imports System.Windows.Shapes

Namespace WpfApplication1
  Public Partial Class DPClearValue
    Private Sub RestoreDefaultProperties(sender As Object, e As RoutedEventArgs)
      Dim uic As UIElementCollection = myDockPanel.Children
      For Each uie As Shape In uic
        Dim locallySetProperties As LocalValueEnumerator = uie.GetLocalValueEnumerator()
        While locallySetProperties.MoveNext()
          Dim propertyToClear As DependencyProperty = DirectCast(locallySetProperties.Current.[Property], DependencyProperty)
          If Not propertyToClear.[ReadOnlyThen
            uie.ClearValue(propertyToClear)
          End If
        End While
      Next
    End Sub
    Private Sub MakeEverythingRed(sender As Object, e As RoutedEventArgs)
      Dim uic As UIElementCollection = myDockPanel.Children
      For Each uie As Shape In uic
        uie.Fill = New SolidColorBrush(Colors.Red)
      Next
    End Sub
  End Class
End Namespace
WPF Clear Locally Set Values And Restore The Default Values Of Dependency Properties
16.50.UI Element
16.50.1.Find enclosure componentFind enclosure component
16.50.2.Clear locally set values and restore the default values of dependency propertiesClear locally set values and restore the default values of dependency properties
16.50.3.PresentationTraceSources.SetTraceLevel(binding,PresentationTraceLevel.High);PresentationTraceSources.SetTraceLevel(binding,PresentationTraceLevel.High);
16.50.4.UI Element Mouse Clicked EventsUI Element Mouse Clicked Events
16.50.5.Programmatically Extract an Element's Style with DefaultStyleKeyPropertyProgrammatically Extract an Element's Style with DefaultStyleKeyProperty
16.50.6.Print Logical TreePrint Logical Tree
16.50.7.Print Visual TreePrint Visual Tree
16.50.8.About Dialog with Tree WalkingAbout Dialog with Tree Walking
16.50.9.Changing graphical elementsChanging graphical elements
16.50.10.UIElement CountUIElement Count
16.50.11.Use Linq to get control from a containerUse Linq to get control from a container
16.50.12.Find inner visual elementFind inner visual element
16.50.13.Logical Visual Tree SampleLogical Visual Tree Sample
16.50.14.Point Hit Test with VisualTreeHelper.HitTestPoint Hit Test with VisualTreeHelper.HitTest
16.50.15.Change the Visibility property of a UIElement.Change the Visibility property of a UIElement.
16.50.16.Mixing graphics with Control ElementsMixing graphics with Control Elements
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