Animation de Gif dans WPF

Je suis en utilisant ce code pour gif Animation dans seprate bibliothèque
et le code xaml dans mon projet principal:

<controls:GifImage GifSource="/project;component/Images/my.gif" Stretch="None" />

Gif Animer (seprate fichier):

public class GifImage : Image
{
#region Memmbers
private GifBitmapDecoder _gifDecoder;
private Int32Animation _animation;
private bool _isInitialized;
#endregion Memmbers
#region Properties
private int FrameIndex
{
get { return (int)GetValue(FrameIndexProperty); }
set { SetValue(FrameIndexProperty, value); }
}
private static readonly DependencyProperty FrameIndexProperty =
DependencyProperty.Register("FrameIndex", typeof(int), typeof(GifImage), new FrameworkPropertyMetadata(0, new PropertyChangedCallback(ChangingFrameIndex)));
private static void ChangingFrameIndex(DependencyObject obj, DependencyPropertyChangedEventArgs ev)
{
GifImage image = obj as GifImage;
image.Source = image._gifDecoder.Frames[(int)ev.NewValue];
}
///<summary>
///Defines whether the animation starts on it's own
///</summary>
public bool AutoStart
{
get { return (bool)GetValue(AutoStartProperty); }
set { SetValue(AutoStartProperty, value); }
}
public static readonly DependencyProperty AutoStartProperty =
DependencyProperty.Register("AutoStart", typeof(bool), typeof(GifImage), new UIPropertyMetadata(false, AutoStartPropertyChanged));
private static void AutoStartPropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
if ((bool)e.NewValue)
(sender as GifImage).StartAnimation();
}
public string GifSource
{
get { return (string)GetValue(GifSourceProperty); }
set { SetValue(GifSourceProperty, value); }
}
public static readonly DependencyProperty GifSourceProperty =
DependencyProperty.Register("GifSource", typeof(string), typeof(GifImage), new UIPropertyMetadata(string.Empty, GifSourcePropertyChanged));
private static void GifSourcePropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
//CARLO 20100622: Reinitialize animation everytime image is changed
(sender as GifImage).Initialize();
}
#endregion Properties
#region Private Instance Methods
private void Initialize()
{
_gifDecoder = new GifBitmapDecoder(new Uri(String.Format("pack://application:,,,{0}", this.GifSource)), BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default);
_animation = new Int32Animation(0, _gifDecoder.Frames.Count - 1, new Duration(new TimeSpan(0, 0, 0, _gifDecoder.Frames.Count / 10, (int)((_gifDecoder.Frames.Count / 10.0 - _gifDecoder.Frames.Count / 10) * 1000))));
_animation.RepeatBehavior = RepeatBehavior.Forever;
this.Source = _gifDecoder.Frames[0];
_isInitialized = true;
}
#endregion Private Instance Methods
#region Public Instance Methods
///<summary>
///Shows and starts the gif animation
///</summary>
public void Show()
{
this.Visibility = Visibility.Visible;
this.StartAnimation();
}
///<summary>
///Hides and stops the gif animation
///</summary>
public void Hide()
{
this.Visibility = Visibility.Collapsed;
this.StopAnimation();
}
///<summary>
///Starts the animation
///</summary>
public void StartAnimation()
{
if (!_isInitialized)
this.Initialize();
BeginAnimation(FrameIndexProperty, _animation);
}
///<summary>
///Stops the animation
///</summary>
public void StopAnimation()
{
BeginAnimation(FrameIndexProperty, null);
}
#endregion Public Instance Methods
}

mais j'obtiens l'erreur:

L'URI préfixe n'est pas reconnu.

Je ne sais pas pourquoi j'obtiens l'erreur. Quelqu'un pourrait-il m'aider s'il vous plaît ?

source d'informationauteur UFO