Control the animation from code
<UserControl x:Class='SilverlightApplication3.MainPage'
xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation'
xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'
xmlns:d='http://schemas.microsoft.com/expression/blend/2008'
xmlns:mc='http://schemas.openxmlformats.org/markup-compatibility/2006'
mc:Ignorable='d'
d:DesignWidth='640'
d:DesignHeight='480'>
<UserControl.Resources>
<Storyboard x:Name="fadeStoryboard">
<DoubleAnimation x:Name="fadeAnimation"
Storyboard.TargetName="imgDay"
Storyboard.TargetProperty="Opacity"
From="1" To="0" Duration="0:0:10" ></DoubleAnimation>
</Storyboard>
</UserControl.Resources>
<Grid x:Name="LayoutRoot" Background="White" Margin="5">
<Grid.RowDefinitions>
<RowDefinition></RowDefinition>
<RowDefinition Height="Auto"></RowDefinition>
<RowDefinition Height="Auto"></RowDefinition>
</Grid.RowDefinitions>
<Grid>
<Image Source="c:/image.jpg"></Image>
<Image Source="c:/image.jpg" Name="imgDay"></Image>
</Grid>
<StackPanel Grid.Row="1" Orientation="Horizontal" HorizontalAlignment="Center" Margin="5">
<Button x:Name="cmdStart" Content="Start" Click="cmdStart_Click" Margin="3" Padding="1"></Button>
<Button x:Name="cmdPause" Content="Pause" Click="cmdPause_Click" Margin="3" Padding="1"></Button>
<Button x:Name="cmdResume" Content="Resume" Click="cmdResume_Click" Margin="3" Padding="1"></Button>
<Button x:Name="cmdStop" Content="Stop" Click="cmdStop_Click" Margin="3" Padding="1"></Button>
<Button x:Name="cmdMiddle" Content="Move To Middle" Click="cmdMiddle_Click" Margin="3" Padding="1"></Button>
</StackPanel>
<Grid Grid.Row="2" Margin="5">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"></ColumnDefinition>
<ColumnDefinition></ColumnDefinition>
<ColumnDefinition Width="Auto"></ColumnDefinition>
</Grid.ColumnDefinitions>
<TextBlock>Speed:</TextBlock>
<Slider Grid.Column="1" x:Name="sldSpeed"
Minimum="0" Maximum="3" Value="1" ValueChanged="sldSpeed_ValueChanged"></Slider>
<TextBlock Grid.Column="2" x:Name="lblSpeed">1.0</TextBlock>
</Grid>
</Grid>
</UserControl>
//File: Page.xaml.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
namespace SilverlightApplication3
{
public partial class MainPage : UserControl
{
public MainPage()
{
InitializeComponent();
}
private void cmdStart_Click(object sender, RoutedEventArgs e)
{
fadeStoryboard.Begin();
}
private void cmdPause_Click(object sender, RoutedEventArgs e)
{
fadeStoryboard.Pause();
}
private void cmdResume_Click(object sender, RoutedEventArgs e)
{
fadeStoryboard.Resume();
}
private void cmdStop_Click(object sender, RoutedEventArgs e)
{
fadeStoryboard.Stop();
}
private void cmdMiddle_Click(object sender, RoutedEventArgs e)
{
fadeStoryboard.Begin();
fadeStoryboard.Seek(TimeSpan.FromSeconds(fadeAnimation.Duration.TimeSpan.TotalSeconds/2));
}
private void sldSpeed_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
{
if (sldSpeed == null) return;
fadeStoryboard.SpeedRatio = sldSpeed.Value;
lblSpeed.Text = sldSpeed.Value.ToString("0.0");
}
}
}
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