Begins a Storyboard and distributes its animations to their targeted objects and properties.
BeginStoryboard is used as a wrapper around a Storyboard object that is being triggered. A BeginStoryboard object can contain only one Storyboard, rather than a collection of them.
In addition to using BeginStoryboard to start a storyboard automatically when an object loads, you can use the interactive methods of the Storyboard object to start, pause, resume, and stop an animation.
The following example shows how to use a Storyboard object and a BeginStoryboard object to make a rectangle that fades in and out of view after it is loaded.
<Canvas xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <Rectangle x:Name="MyAnimatedRectangle" Width="100" Height="100" Fill="Blue"> <Rectangle.Triggers> <!-- Animates the rectangle's opacity. --> <EventTrigger RoutedEvent="Rectangle.Loaded"> <BeginStoryboard> <Storyboard> <DoubleAnimation Storyboard.TargetName="MyAnimatedRectangle" Storyboard.TargetProperty="Opacity" From="1.0" To="0.0" Duration="0:0:5" AutoReverse="True" RepeatBehavior="Forever" /> </Storyboard> </BeginStoryboard> </EventTrigger> </Rectangle.Triggers> </Rectangle> </Canvas>