我不确定这个问题是否已经解决，但最好的方法是使用WpfAnimatedGid库。这是非常容易，简单和直接的使用。它只需要2行XAML代码和后面的5行c#代码。

您将看到关于如何在那里使用它的所有必要细节。这也是我用来代替重新发明轮子的方法

这个小程序怎么样: 背后的代码:

public MainWindow()
{
  InitializeComponent();
  Files = Directory.GetFiles(@"I:\images");
  this.DataContext= this;
}
public string[] Files
{get;set;}

XAML:

<Window x:Class="PicViewer.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="175" />
            <ColumnDefinition Width="*" />
        </Grid.ColumnDefinitions>
        <ListBox x:Name="lst" ItemsSource="{Binding Path=Files}"/>
        <MediaElement Grid.Column="1" LoadedBehavior="Play" Source="{Binding ElementName=lst, Path=SelectedItem}" Stretch="None"/>
    </Grid>
</Window>

基本上与上面的PictureBox解决方案相同，但这次使用了在项目中使用嵌入式资源的幕后代码:

在XAML:

<WindowsFormsHost x:Name="_loadingHost">
  <Forms:PictureBox x:Name="_loadingPictureBox"/>
</WindowsFormsHost>

在后台代码:

public partial class ProgressIcon
{
    public ProgressIcon()
    {
        InitializeComponent();
        var stream = Assembly.GetExecutingAssembly().GetManifestResourceStream("My.Namespace.ProgressIcon.gif");
        var image = System.Drawing.Image.FromStream(stream);
        Loaded += (s, e) => _loadingPictureBox.Image = image;
    }
}

在WPF中等待动画的替代方法是:

 <ProgressBar Height="20" Width="100" IsIndeterminate="True"/>

它将显示一个动画进度条。

上面的方法我都试过了，但每个方法都有自己的不足，感谢大家，我想出了自己的GifImage:

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Windows.Controls;
    using System.Windows;
    using System.Windows.Media.Imaging;
    using System.IO;
    using System.Windows.Threading;

    namespace IEXM.Components
    {
    public class GifImage : Image
    {
            #region gif Source, such as "/IEXM;component/Images/Expression/f020.gif"
            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(null, GifSourcePropertyChanged));

            private static void GifSourcePropertyChanged(DependencyObject sender,
                    DependencyPropertyChangedEventArgs e)
            {
                    (sender as GifImage).Initialize();
            }
            #endregion

            #region control the animate
            /// <summary>
            /// Defines whether the animation starts on it's own
            /// </summary>
            public bool IsAutoStart
            {
                    get { return (bool)GetValue(AutoStartProperty); }
                    set { SetValue(AutoStartProperty, value); }
            }

            public static readonly DependencyProperty AutoStartProperty =
                    DependencyProperty.Register("IsAutoStart", typeof(bool),
                    typeof(GifImage), new UIPropertyMetadata(false, AutoStartPropertyChanged));

            private static void AutoStartPropertyChanged(DependencyObject sender,
                    DependencyPropertyChangedEventArgs e)
            {
                    if ((bool)e.NewValue)
                            (sender as GifImage).StartAnimation();
                    else
                            (sender as GifImage).StopAnimation();
            }
            #endregion

            private bool _isInitialized = false;
            private System.Drawing.Bitmap _bitmap;
            private BitmapSource _source;

            [System.Runtime.InteropServices.DllImport("gdi32.dll")]
            public static extern bool DeleteObject(IntPtr hObject);

            private BitmapSource GetSource()
            {
                    if (_bitmap == null)
                    {
                            _bitmap = new System.Drawing.Bitmap(Application.GetResourceStream(
                                     new Uri(GifSource, UriKind.RelativeOrAbsolute)).Stream);
                    }

                    IntPtr handle = IntPtr.Zero;
                    handle = _bitmap.GetHbitmap();

                    BitmapSource bs = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
                            handle, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
                    DeleteObject(handle);
                    return bs;
            }

            private void Initialize()
            {
            //        Console.WriteLine("Init: " + GifSource);
                    if (GifSource != null)
                            Source = GetSource();
                    _isInitialized = true;
            }

            private void FrameUpdatedCallback()
            {
                    System.Drawing.ImageAnimator.UpdateFrames();

                    if (_source != null)
                    {
                            _source.Freeze();
                    }

               _source = GetSource();

              //  Console.WriteLine("Working: " + GifSource);

                    Source = _source;
                    InvalidateVisual();
            }

            private void OnFrameChanged(object sender, EventArgs e)
            {
                    Dispatcher.BeginInvoke(DispatcherPriority.Normal, new Action(FrameUpdatedCallback));
            }

            /// <summary>
            /// Starts the animation
            /// </summary>
            public void StartAnimation()
            {
                    if (!_isInitialized)
                            this.Initialize();


             //   Console.WriteLine("Start: " + GifSource);

                    System.Drawing.ImageAnimator.Animate(_bitmap, OnFrameChanged);
            }

            /// <summary>
            /// Stops the animation
            /// </summary>
            public void StopAnimation()
            {
                    _isInitialized = false;
                    if (_bitmap != null)
                    {
                            System.Drawing.ImageAnimator.StopAnimate(_bitmap, OnFrameChanged);
                            _bitmap.Dispose();
                            _bitmap = null;
                    }
                    _source = null;
                    Initialize();
                    GC.Collect();
                    GC.WaitForFullGCComplete();

             //   Console.WriteLine("Stop: " + GifSource);
            }

            public void Dispose()
            {
                    _isInitialized = false;
                    if (_bitmap != null)
                    {
                            System.Drawing.ImageAnimator.StopAnimate(_bitmap, OnFrameChanged);
                            _bitmap.Dispose();
                            _bitmap = null;
                    }
                    _source = null;
                    GC.Collect();
                    GC.WaitForFullGCComplete();
               // Console.WriteLine("Dispose: " + GifSource);
            }
    }
}

用法:

<localComponents:GifImage x:Name="gifImage" IsAutoStart="True" GifSource="{Binding Path=value}" />

因为它不会导致内存泄漏，它动画gif图像自己的时间线，你可以尝试一下。

谢谢你的帖子Joel，它帮助我解决了WPF对动画gif的不支持。只是添加了一点代码，因为我有一个设置pictureBoxLoading的时间。Image属性，因为Winforms api。

我必须将我的动画gif图像的构建动作设置为“Content”，并将复制到输出目录设置为“如果更新则复制”或“always”。然后在MainWindow()中调用这个方法。唯一的问题是，当我试图处理流时，它给了我一个红包图形而不是我的图像。我必须解决这个问题。这消除了加载BitmapImage并将其更改为Bitmap的痛苦(这显然杀死了我的动画，因为它不再是gif)。

private void SetupProgressIcon()
{
   Uri uri = new Uri("pack://application:,,,/WPFTest;component/Images/animated_progress_apple.gif");
   if (uri != null)
   {
      Stream stream = Application.GetContentStream(uri).Stream;   
      imgProgressBox.Image = new System.Drawing.Bitmap(stream);
   }
}