RepeatBehavior structure

Describes how a Timeline repeats its simple duration.

Syntax

public struct RepeatBehavior

<object property="iterationsx"/>
- or -
<object property="[days.]hours:minutes:seconds[.fractionalSeconds]"/>
- or -
<object property="Forever"/>

XAML Values

iterationsx

The iterations placeholder in the iterations form is an integer, specifying the number of times that an animation should repeat. The x is a literal, lower-case character x. (A way to remember this convention is to think of x as a multiplication character, that is, "3x" means "3 times".) Iterations set the Count data; a TimeSpan value does not set the Count data.

days

Optional. An integer value greater than or equal to 0 that specifies the number of days.

hours

Required, even if 0. An integer value between 0 and 23 that specifies the number of hours.

minutes

Optional if only hours are desired, but must be set to at least 0 if you intend to set a seconds value. An integer value between 0 and 59 that specifies the number of minutes.

seconds

Optional if only hours/minutes are desired. An integer value between 0 and 59 that specifies the number of seconds.

fractionalSeconds

Optional. A value consisting of 1 to 7 digits of decimal precision that specifies fractional seconds.

Forever

The literal "Forever"; see Remarks.

Attributes

VersionAttribute(NTDDI_WIN8)

WebHostHiddenAttribute()

Members

The RepeatBehavior structure has these types of members:

• Constructors
• Fields
• Methods
• Operators
• Properties

Constructors

The RepeatBehavior structure has these constructors.

Fields

The RepeatBehavior structure has these fields.

Methods

The RepeatBehavior structure has these methods. It also inherits methods from the Object class.

Operators

The RepeatBehavior structure has these operators.

Properties

The RepeatBehavior structure has these properties.

Remarks

There are three types of RepeatBehavior behaviors:

• Time span: specifies the active duration of a Timeline, possibly repeating the animation if the Timeline.Duration is shorter. For example, a Timeline with a simple Timeline.Duration value of 1 second and a RepeatBehavior.Duration value of 2.5 seconds will run for 2.5 iterations, and 2.5 seconds.
• Iteration count: specifies the number of times the simple duration of a Timeline plays. The default iteration count is 1.0, and this means the Timeline is active for exactly one of its simple durations. A count of 0.5 specifies that the timeline is active for half of its simple duration, while a count of 2 specifies that the timeline repeats its simple duration twice. For more information, see Count.
• Forever: the Timeline repeats indefinitely.

A RepeatBehavior should only contain non-zero values for one of its two possible data properties Count or Duration. If the RepeatBehaviorType is Count, then the Count member of a RepeatBehavior is the relevant value. If the RepeatBehaviorType is Duration, then the Duration member of a RepeatBehavior is the relevant value. If the RepeatBehaviorType is Forever, then neither Count nor Duration are relevant; the repeat behavior is such that the targeted animation will repeat continuously without a limit.

Notes on XAML syntax

You cannot declare a RepeatBehavior as a shareable object in a ResourceDictionary.

Projection and members of RepeatBehavior

If you are using a Microsoft .NET language (C# or Microsoft Visual Basic), or in Visual C++ component extensions (C++/CX), then RepeatBehavior has non-data members available, and its data members Count, Duration and Type are exposed as read-write properties, not fields.

If you are programming with C++ using the Windows Runtime Template Library (WRL), then only the data member fields Count, Duration, and Type exist as members of RepeatBehavior, and you cannot use the utility methods or properties listed in the members table. WRL code can access similar utility methods that exist on the RepeatBehaviorHelper class.

Examples

This example shows several different ways to set the RepeatBehavior of an animation and how these settings can affect your animation.

<StackPanel Margin="20">
    <StackPanel.Resources>
        <Storyboard x:Name="myStoryboard">

            <!-- Create an animation that repeats indefinitely. -->
            <DoubleAnimation 
              Storyboard.TargetName="ForeverRepeatingTransform" 
              Storyboard.TargetProperty="ScaleX" 
              From="1" To="5" Duration="0:0:2" RepeatBehavior="Forever" />

            <!-- Create an animation that repeats for four seconds. Because
                 the animation is 2 seconds each, you get two repeats. -->
            <DoubleAnimation 
              Storyboard.TargetName="FourSecondsRepeatingTransform" 
              Storyboard.TargetProperty="ScaleX"
              From="1" To="5" Duration="0:0:2" RepeatBehavior="0:0:4" 
              EnableDependentAnimation="True"/>

            <!-- Create an animation that repeats twice. -->
            <DoubleAnimation 
              Storyboard.TargetName="TwiceRepeatingTransform" 
              Storyboard.TargetProperty="ScaleX" 
              From="1" To="5" Duration="0:0:2" RepeatBehavior="2x" 
              EnableDependentAnimation="True"/>

            <!-- Create an animation that repeats 0.5 times. The resulting animation
                 plays for one second, half of its Duration. It animates from 50 to 150. -->
            <DoubleAnimation 
              Storyboard.TargetName="HalfRepeatingTransform" 
              Storyboard.TargetProperty="ScaleX" 
              From="1" To="5" Duration="0:0:2" RepeatBehavior="0.5x" 
              EnableDependentAnimation="True"/>

            <!-- Create an animation that repeats for one second. The resulting animation
                 plays for one second, half of its Duration. It animates from 50 to 150. -->
            <DoubleAnimation 
              Storyboard.TargetName="OneSecondRepeatingTransform" 
              Storyboard.TargetProperty="ScaleX" 
              From="1" To="5" Duration="0:0:2" RepeatBehavior="0:0:1" 
              EnableDependentAnimation="True"/>
        </Storyboard>
    </StackPanel.Resources>

    <!-- Create several rectangles to animate. -->
    <Rectangle Fill="Red" Width="50" Height="20" >
        <Rectangle.RenderTransform>
            <ScaleTransform x:Name="ForeverRepeatingTransform" />
        </Rectangle.RenderTransform>
   </Rectangle>
   <Rectangle Fill="Blue" Width="50" Height="20" >
       <Rectangle.RenderTransform>
           <ScaleTransform x:Name="FourSecondsRepeatingTransform" />
       </Rectangle.RenderTransform>
   </Rectangle>
   <Rectangle Fill="Yellow" Width="50" Height="20" >
       <Rectangle.RenderTransform>
           <ScaleTransform x:Name="TwiceRepeatingTransform" />
       </Rectangle.RenderTransform>
   </Rectangle>
   <Rectangle Fill="Green" Width="50" Height="20" >
       <Rectangle.RenderTransform>
           <ScaleTransform x:Name="HalfRepeatingTransform" />
       </Rectangle.RenderTransform>
   </Rectangle>
   <Rectangle Fill="Orange" Width="50" Height="20" >
       <Rectangle.RenderTransform>
           <ScaleTransform x:Name="OneSecondRepeatingTransform" />
       </Rectangle.RenderTransform>
   </Rectangle>

        <!-- Create buttons to restart and stop the animations. -->
   <Button Margin="10" Content="Restart Animation" Click="Start_Animation" />


</StackPanel>

private void Start_Animation(object sender, RoutedEventArgs e)
{
    myStoryboard.Begin();
}

Requirements

Build date: 12/4/2012