How to: Animate a BorderThickness Value
This example shows how to animate changes to the thickness of a border by using the ThicknessAnimation class.
Example
The following example animates the thickness of a border by using ThicknessAnimation. The example uses the BorderThickness property of Border.
Imports Microsoft.VisualBasic
Imports System
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Shapes
Imports System.Windows.Media.Animation
Imports System.Windows.Media
Namespace SDKSamples
Public Class ThicknessAnimationExample
Inherits Page
Public Sub New()
' Create a NameScope for this page so that
' Storyboards can be used.
NameScope.SetNameScope(Me, New NameScope())
' Create a Border which will be the target of the animation.
Dim myBorder As New Border()
With myBorder
.Background = Brushes.Gray
.BorderBrush = Brushes.Black
.BorderThickness = New Thickness(1)
.Margin = New Thickness(0, 60, 0, 20)
.Padding = New Thickness(20)
End With
' Assign the border a name so that
' it can be targeted by a Storyboard.
Me.RegisterName("myAnimatedBorder", myBorder)
Dim myThicknessAnimation As New ThicknessAnimation()
With myThicknessAnimation
.Duration = TimeSpan.FromSeconds(1.5)
.FillBehavior = FillBehavior.HoldEnd
' Set the From and To properties of the animation.
' BorderThickness animates from left=1, right=1, top=1, and bottom=1
' to left=28, right=28, top=14, and bottom=14 over one and a half seconds.
.From = New Thickness(1, 1, 1, 1)
.To = New Thickness(28, 14, 28, 14)
End With
' Set the animation to target the Size property
' of the object named "myArcSegment."
Storyboard.SetTargetName(myThicknessAnimation, "myAnimatedBorder")
Storyboard.SetTargetProperty(myThicknessAnimation, New PropertyPath(Border.BorderThicknessProperty))
' Create a storyboard to apply the animation.
Dim ellipseStoryboard As New Storyboard()
ellipseStoryboard.Children.Add(myThicknessAnimation)
' Start the storyboard when the Path loads.
AddHandler myBorder.Loaded, Sub(sender As Object, e As RoutedEventArgs) ellipseStoryboard.Begin(Me)
Dim myStackPanel As New StackPanel()
myStackPanel.HorizontalAlignment = HorizontalAlignment.Center
myStackPanel.Children.Add(myBorder)
Content = myStackPanel
End Sub
End Class
End Namespace
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Shapes;
using System.Windows.Media.Animation;
using System.Windows.Media;
namespace SDKSamples
{
public class ThicknessAnimationExample : Page
{
public ThicknessAnimationExample()
{
// Create a NameScope for this page so that
// Storyboards can be used.
NameScope.SetNameScope(this, new NameScope());
// Create a Border which will be the target of the animation.
Border myBorder = new Border();
myBorder.Background = Brushes.Gray;
myBorder.BorderBrush = Brushes.Black;
myBorder.BorderThickness = new Thickness(1);
myBorder.Margin = new Thickness(0, 60, 0, 20);
myBorder.Padding = new Thickness(20);
// Assign the border a name so that
// it can be targeted by a Storyboard.
this.RegisterName(
"myAnimatedBorder", myBorder);
ThicknessAnimation myThicknessAnimation = new ThicknessAnimation();
myThicknessAnimation.Duration = TimeSpan.FromSeconds(1.5);
myThicknessAnimation.FillBehavior = FillBehavior.HoldEnd;
// Set the From and To properties of the animation.
// BorderThickness animates from left=1, right=1, top=1, and bottom=1
// to left=28, right=28, top=14, and bottom=14 over one and a half seconds.
myThicknessAnimation.From = new Thickness(1, 1, 1, 1);
myThicknessAnimation.To = new Thickness(28, 14, 28, 14);
// Set the animation to target the Size property
// of the object named "myArcSegment."
Storyboard.SetTargetName(myThicknessAnimation, "myAnimatedBorder");
Storyboard.SetTargetProperty(
myThicknessAnimation, new PropertyPath(Border.BorderThicknessProperty));
// Create a storyboard to apply the animation.
Storyboard ellipseStoryboard = new Storyboard();
ellipseStoryboard.Children.Add(myThicknessAnimation);
// Start the storyboard when the Path loads.
myBorder.Loaded += delegate(object sender, RoutedEventArgs e)
{
ellipseStoryboard.Begin(this);
};
StackPanel myStackPanel = new StackPanel();
myStackPanel.HorizontalAlignment = HorizontalAlignment.Center;
myStackPanel.Children.Add(myBorder);
Content = myStackPanel;
}
}
}
<!-- This example shows how to use the ThicknessAnimation to create
an animation on the BorderThickness property of a Border. -->
<Page xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="https://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>
For the complete sample, see Animation Example Gallery.
See Also
Tasks
How to: Animate the Thickness of a Border by Using Key Frames