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copied!<p>I modified Mike Eshva's code,And I made it work better.You can use it with either 1frame jpg png bmp or mutil-frame gif.If you want bind a uri to the control,bind the UriSource properties or you want bind any in-memory stream that you bind the Source propertie which is a BitmapImage.</p> <pre><code> /// <summary> /// Элемент управления "Изображения", поддерживающий анимированные GIF. /// </summary> public class AnimatedImage : Image { static AnimatedImage() { DefaultStyleKeyProperty.OverrideMetadata(typeof(AnimatedImage), new FrameworkPropertyMetadata(typeof(AnimatedImage))); } #region Public properties /// <summary> /// Получает/устанавливает номер текущего кадра. /// </summary> public int FrameIndex { get { return (int)GetValue(FrameIndexProperty); } set { SetValue(FrameIndexProperty, value); } } /// <summary> /// Get the BitmapFrame List. /// </summary> public List<BitmapFrame> Frames { get; private set; } /// <summary> /// Get or set the repeatBehavior of the animation when source is gif formart.This is a dependency object. /// </summary> public RepeatBehavior AnimationRepeatBehavior { get { return (RepeatBehavior)GetValue(AnimationRepeatBehaviorProperty); } set { SetValue(AnimationRepeatBehaviorProperty, value); } } public new BitmapImage Source { get { return (BitmapImage)GetValue(SourceProperty); } set { SetValue(SourceProperty, value); } } public Uri UriSource { get { return (Uri)GetValue(UriSourceProperty); } set { SetValue(UriSourceProperty, value); } } #endregion #region Protected interface /// <summary> /// Provides derived classes an opportunity to handle changes to the Source property. /// </summary> protected virtual void OnSourceChanged(DependencyPropertyChangedEventArgs e) { ClearAnimation(); BitmapImage source; if (e.NewValue is Uri) { source = new BitmapImage(); source.BeginInit(); source.UriSource = e.NewValue as Uri; source.CacheOption = BitmapCacheOption.OnLoad; source.EndInit(); } else if (e.NewValue is BitmapImage) { source = e.NewValue as BitmapImage; } else { return; } BitmapDecoder decoder; if (source.StreamSource != null) { decoder = BitmapDecoder.Create(source.StreamSource, BitmapCreateOptions.DelayCreation, BitmapCacheOption.OnLoad); } else if (source.UriSource != null) { decoder = BitmapDecoder.Create(source.UriSource, BitmapCreateOptions.DelayCreation, BitmapCacheOption.OnLoad); } else { return; } if (decoder.Frames.Count == 1) { base.Source = decoder.Frames[0]; return; } this.Frames = decoder.Frames.ToList(); PrepareAnimation(); } #endregion #region Private properties private Int32Animation Animation { get; set; } private bool IsAnimationWorking { get; set; } #endregion #region Private methods private void ClearAnimation() { if (Animation != null) { BeginAnimation(FrameIndexProperty, null); } IsAnimationWorking = false; Animation = null; this.Frames = null; } private void PrepareAnimation() { Animation = new Int32Animation( 0, this.Frames.Count - 1, new Duration( new TimeSpan( 0, 0, 0, this.Frames.Count / 10, (int)((this.Frames.Count / 10.0 - this.Frames.Count / 10) * 1000)))) { RepeatBehavior = RepeatBehavior.Forever }; base.Source = this.Frames[0]; BeginAnimation(FrameIndexProperty, Animation); IsAnimationWorking = true; } private static void ChangingFrameIndex (DependencyObject dp, DependencyPropertyChangedEventArgs e) { AnimatedImage animatedImage = dp as AnimatedImage; if (animatedImage == null || !animatedImage.IsAnimationWorking) { return; } int frameIndex = (int)e.NewValue; ((Image)animatedImage).Source = animatedImage.Frames[frameIndex]; animatedImage.InvalidateVisual(); } /// <summary> /// Handles changes to the Source property. /// </summary> private static void OnSourceChanged (DependencyObject dp, DependencyPropertyChangedEventArgs e) { ((AnimatedImage)dp).OnSourceChanged(e); } #endregion #region Dependency Properties /// <summary> /// FrameIndex Dependency Property /// </summary> public static readonly DependencyProperty FrameIndexProperty = DependencyProperty.Register( "FrameIndex", typeof(int), typeof(AnimatedImage), new UIPropertyMetadata(0, ChangingFrameIndex)); /// <summary> /// Source Dependency Property /// </summary> public new static readonly DependencyProperty SourceProperty = DependencyProperty.Register( "Source", typeof(BitmapImage), typeof(AnimatedImage), new FrameworkPropertyMetadata( null, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure, OnSourceChanged)); /// <summary> /// AnimationRepeatBehavior Dependency Property /// </summary> public static readonly DependencyProperty AnimationRepeatBehaviorProperty = DependencyProperty.Register( "AnimationRepeatBehavior", typeof(RepeatBehavior), typeof(AnimatedImage), new PropertyMetadata(null)); public static readonly DependencyProperty UriSourceProperty = DependencyProperty.Register( "UriSource", typeof(Uri), typeof(AnimatedImage), new FrameworkPropertyMetadata( null, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure, OnSourceChanged)); #endregion } </code></pre> <p>This is a custom control. You need to create it in WPF App Project,and delete the Template override in style.</p>

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