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.cs
using System.Windows;
using System.Collections;
using System.Windows.Media;
using System.Windows.Controls;
using System.Windows.Shapes;
namespace WpfApplication1 {
public partial class DPClearValue {
void RestoreDefaultProperties(object sender, RoutedEventArgs e)
{
UIElementCollection uic = myDockPanel.Children;
foreach (Shape uie in uic)
{
LocalValueEnumerator locallySetProperties = uie.GetLocalValueEnumerator();
while (locallySetProperties.MoveNext())
{
DependencyProperty propertyToClear = (DependencyProperty)locallySetProperties.Current.Property;
if (!propertyToClear.ReadOnly) { uie.ClearValue(propertyToClear); }
}
}
}
void MakeEverythingRed(object sender, RoutedEventArgs e)
{
UIElementCollection uic = myDockPanel.Children;
foreach (Shape uie in uic) {uie.Fill = new SolidColorBrush(Colors.Red);}
}
}
}
Related examples in the same category
