Question

我应该使用哪种控制类型 - Image，MediaElement等？

Answer 1

我无法得到这个问题（Dario上面）最流行的答案才能正常工作。结果是奇怪的，不稳定的动画与奇怪的文物。到目前为止我找到的最佳解决方案： https://github.com/XamlAnimatedGif/WpfAnimatedGif

您可以使用NuGet

安装它

PM> Install-Package WpfAnimatedGif

并使用它，在要添加gif图像的窗口的新命名空间中使用它，如下所示

<Window x:Class="MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:gif="http://wpfanimatedgif.codeplex.com" <!-- THIS NAMESPACE -->
    Title="MainWindow" Height="350" Width="525">

<Grid>
    <!-- EXAMPLE USAGE BELOW -->
    <Image gif:ImageBehavior.AnimatedSource="Images/animated.gif" />

包真的很整洁，你可以设置一些属性，如下面的

    <Image gif:ImageBehavior.RepeatBehavior="3x"
           gif:ImageBehavior.AnimatedSource="Images/animated.gif" />

您也可以在代码中使用它：

var image = new BitmapImage();
image.BeginInit();
image.UriSource = new Uri(fileName);
image.EndInit();
ImageBehavior.SetAnimatedSource(img, image);

编辑：Silverlight支持

根据josh2112的评论，如果您想为您的Silverlight项目添加动画GIF支持，请使用github.com/XamlAnimatedGif/XamlAnimatedGif

Answer 2

我发布了扩展图像控件并使用Gif解码器的解决方案。 gif解码器具有帧属性。我为FrameIndex属性设置了动画。事件ChangingFrameIndex将源属性更改为与FrameIndex（即解码器中）对应的帧。我想gif每秒有10帧。

class GifImage : Image
{
    private bool _isInitialized;
    private GifBitmapDecoder _gifDecoder;
    private Int32Animation _animation;

    public int FrameIndex
    {
        get { return (int)GetValue(FrameIndexProperty); }
        set { SetValue(FrameIndexProperty, value); }
    }

    private void Initialize()
    {
        _gifDecoder = new GifBitmapDecoder(new Uri("pack://application:,,," + 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;
    }

    static GifImage()
    {
        VisibilityProperty.OverrideMetadata(typeof (GifImage),
            new FrameworkPropertyMetadata(VisibilityPropertyChanged));
    }

    private static void VisibilityPropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
    {
        if ((Visibility)e.NewValue == Visibility.Visible)
        {
            ((GifImage)sender).StartAnimation();
        }
        else
        {
            ((GifImage)sender).StopAnimation();
        }
    }

    public static readonly DependencyProperty FrameIndexProperty =
        DependencyProperty.Register("FrameIndex", typeof(int), typeof(GifImage), new UIPropertyMetadata(0, new PropertyChangedCallback(ChangingFrameIndex)));

    static void ChangingFrameIndex(DependencyObject obj, DependencyPropertyChangedEventArgs ev)
    {
        var gifImage = obj as GifImage;
        gifImage.Source = gifImage._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)
    {
        (sender as GifImage).Initialize();
    }

    /// <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);
    }
}

用法示例（XAML）：

<controls:GifImage x:Name="gifImage" Stretch="None" GifSource="/SomeImage.gif" AutoStart="True" />

Answer 3

这个小应用程序怎么样：代码背后：

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>

Answer 4

我也进行了搜索，并在旧的MSDN论坛上的一个帖子中找到了几个不同的解决方案。（链接不再有效，所以我删除了它）

最简单的执行似乎是使用WinForms PictureBox控件，并且像这样（从线程中改变了一些东西，大部分都是相同的）。

首先向您的项目添加对System.Windows.Forms，WindowsFormsIntegration和System.Drawing的引用。

<Window x:Class="GifExample.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:wfi="clr-namespace:System.Windows.Forms.Integration;assembly=WindowsFormsIntegration"
    xmlns:winForms="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms"
    Loaded="Window_Loaded" >
    <Grid>
        <wfi:WindowsFormsHost>
            <winForms:PictureBox x:Name="pictureBoxLoading">
            </winForms:PictureBox>
        </wfi:WindowsFormsHost>
    </Grid>
</Window >

然后在Window_Loaded处理程序中，将pictureBoxLoading.ImageLocation属性设置为要显示的图像文件路径。

private void Window_Loaded(object sender, RoutedEventArgs e)
{
    pictureBoxLoading.ImageLocation = "../Images/mygif.gif";
}

该线程中提到了MediaElement控件，但也提到它是一个相当重的控件，因此有许多替代方案，包括至少2个基于{{1}的自制控件控制，所以这是最简单的。

Answer 5

如果您使用<MediaElement>，则非常简单：

<MediaElement  Height="113" HorizontalAlignment="Left" Margin="12,12,0,0" 
Name="mediaElement1" VerticalAlignment="Top" Width="198" Source="C:\Users\abc.gif"
LoadedBehavior="Play" Stretch="Fill" SpeedRatio="1" IsMuted="False" />

Answer 6

这是我的动画图像控件版本。您可以使用标准属性Source来指定图像源。我进一步改进了它。我是俄罗斯人，项目是俄语，所以评论也是俄语。但无论如何，你应该能够理解所有内容而不需要评论。：）

/// <summary>
/// Control the "Images", which supports animated GIF.
/// </summary>
public class AnimatedImage : Image
{
    #region Public properties

    /// <summary>
    /// Gets / sets the number of the current frame.
    /// </summary>
    public int FrameIndex
    {
        get { return (int) GetValue(FrameIndexProperty); }
        set { SetValue(FrameIndexProperty, value); }
    }

    /// <summary>
    /// Gets / sets the image that will be drawn.
    /// </summary>
    public new ImageSource Source
    {
        get { return (ImageSource) GetValue(SourceProperty); }
        set { SetValue(SourceProperty, value); }
    }

    #endregion

    #region Protected interface

    /// <summary>
    /// Provides derived classes an opportunity to handle changes to the Source property.
    /// </summary>
    protected virtual void OnSourceChanged(DependencyPropertyChangedEventArgs aEventArgs)
    {
        ClearAnimation();

        BitmapImage lBitmapImage = aEventArgs.NewValue as BitmapImage;

        if (lBitmapImage == null)
        {
            ImageSource lImageSource = aEventArgs.NewValue as ImageSource;
            base.Source = lImageSource;
            return;
        }

        if (!IsAnimatedGifImage(lBitmapImage))
        {
            base.Source = lBitmapImage;
            return;
        }

        PrepareAnimation(lBitmapImage);
    }

    #endregion

    #region Private properties

    private Int32Animation Animation { get; set; }
    private GifBitmapDecoder Decoder { get; set; }
    private bool IsAnimationWorking { get; set; }

    #endregion

    #region Private methods

    private void ClearAnimation()
    {
        if (Animation != null)
        {
            BeginAnimation(FrameIndexProperty, null);
        }

        IsAnimationWorking = false;
        Animation = null;
        Decoder = null;
    }

    private void PrepareAnimation(BitmapImage aBitmapImage)
    {
        Debug.Assert(aBitmapImage != null);

        if (aBitmapImage.UriSource != null)
        {
            Decoder = new GifBitmapDecoder(
                aBitmapImage.UriSource,
                BitmapCreateOptions.PreservePixelFormat,
                BitmapCacheOption.Default);
        }
        else
        {
            aBitmapImage.StreamSource.Position = 0;
            Decoder = new GifBitmapDecoder(
                aBitmapImage.StreamSource,
                BitmapCreateOptions.PreservePixelFormat,
                BitmapCacheOption.Default);
        }

        Animation =
            new Int32Animation(
                0,
                Decoder.Frames.Count - 1,
                new Duration(
                    new TimeSpan(
                        0,
                        0,
                        0,
                        Decoder.Frames.Count / 10,
                        (int) ((Decoder.Frames.Count / 10.0 - Decoder.Frames.Count / 10) * 1000))))
                {
                    RepeatBehavior = RepeatBehavior.Forever
                };

        base.Source = Decoder.Frames[0];
        BeginAnimation(FrameIndexProperty, Animation);
        IsAnimationWorking = true;
    }

    private bool IsAnimatedGifImage(BitmapImage aBitmapImage)
    {
        Debug.Assert(aBitmapImage != null);

        bool lResult = false;
        if (aBitmapImage.UriSource != null)
        {
            BitmapDecoder lBitmapDecoder = BitmapDecoder.Create(
                aBitmapImage.UriSource,
                BitmapCreateOptions.PreservePixelFormat,
                BitmapCacheOption.Default);
            lResult = lBitmapDecoder is GifBitmapDecoder;
        }
        else if (aBitmapImage.StreamSource != null)
        {
            try
            {
                long lStreamPosition = aBitmapImage.StreamSource.Position;
                aBitmapImage.StreamSource.Position = 0;
                GifBitmapDecoder lBitmapDecoder =
                    new GifBitmapDecoder(
                        aBitmapImage.StreamSource,
                        BitmapCreateOptions.PreservePixelFormat,
                        BitmapCacheOption.Default);
                lResult = lBitmapDecoder.Frames.Count > 1;

                aBitmapImage.StreamSource.Position = lStreamPosition;
            }
            catch
            {
                lResult = false;
            }
        }

        return lResult;
    }

    private static void ChangingFrameIndex
        (DependencyObject aObject, DependencyPropertyChangedEventArgs aEventArgs)
    {
        AnimatedImage lAnimatedImage = aObject as AnimatedImage;

        if (lAnimatedImage == null || !lAnimatedImage.IsAnimationWorking)
        {
            return;
        }

        int lFrameIndex = (int) aEventArgs.NewValue;
        ((Image) lAnimatedImage).Source = lAnimatedImage.Decoder.Frames[lFrameIndex];
        lAnimatedImage.InvalidateVisual();
    }

    /// <summary>
    /// Handles changes to the Source property.
    /// </summary>
    private static void OnSourceChanged
        (DependencyObject aObject, DependencyPropertyChangedEventArgs aEventArgs)
    {
        ((AnimatedImage) aObject).OnSourceChanged(aEventArgs);
    }

    #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 (ImageSource),
            typeof (AnimatedImage),
            new FrameworkPropertyMetadata(
                null,
                FrameworkPropertyMetadataOptions.AffectsRender |
                FrameworkPropertyMetadataOptions.AffectsMeasure,
                OnSourceChanged));

    #endregion
}

Answer 7

我使用此库：http://wpfanimatedgif.codeplex.com/

首先，将库安装到项目中（使用Package Manager控制台）：

    PM > Install-Package WpfAnimatedGif

然后，将此代码段用于XAML文件：

    <Window x:Class="WpfAnimatedGif.Demo.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:gif="http://wpfanimatedgif.codeplex.com"
        Title="MainWindow" Height="350" Width="525">
        <Grid>
            <Image gif:ImageBehavior.AnimatedSource="Images/animated.gif" />
        ...

我希望有所帮助。

来源：http://wpfanimatedgif.codeplex.com/

Answer 8

我修改了Mike Eshva的代码，并且我使它更好用。你可以使用1frame jpg png bmp或mutil-frame gif。如果你想将uri绑定到控件，绑定UriSource属性或者你想要绑定绑定源属性的任何内存中的流，它是一个BitmapImage。

    /// <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
}

这是一个自定义控件。您需要在WPF App Project中创建它，并删除样式中的模板覆盖。

Answer 9

上面基本上是相同的PictureBox解决方案，但这次使用代码隐藏在项目中使用嵌入式资源：

在XAML中：

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

在Code-Behind中：

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;
    }
}

Answer 10

我有这个问题，直到我发现在WPF4中，您可以模拟自己的关键帧图像动画。首先，将动画分成一系列图像，标题为“Image1.gif”，“Image2，gif”等。将这些图像导入解决方案资源。我假设你把它们放在图像的默认资源位置。

您将使用Image控件。使用以下XAML代码。我删除了非必需品。

<Image Name="Image1">
   <Image.Triggers>
      <EventTrigger RoutedEvent="Image.Loaded"
         <EventTrigger.Actions>
            <BeginStoryboard>
               <Storyboard>
                   <ObjectAnimationUsingKeyFrames Duration="0:0:1" Storyboard.TargetProperty="Source" RepeatBehavior="Forever">
                      <DiscreteObjectKeyFrames KeyTime="0:0:0">
                         <DiscreteObjectKeyFrame.Value>
                            <BitmapImage UriSource="Images/Image1.gif"/>
                         </DiscreteObjectKeyFrame.Value>
                      </DiscreteObjectKeyFrames>
                     <DiscreteObjectKeyFrames KeyTime="0:0:0.25">
                        <DiscreteObjectKeyFrame.Value>
                           <BitmapImage UriSource="Images/Image2.gif"/>
                        </DiscreteObjectKeyFrame.Value>
                     </DiscreteObjectKeyFrames>
                     <DiscreteObjectKeyFrames KeyTime="0:0:0.5">
                        <DiscreteObjectKeyFrame.Value>
                           <BitmapImage UriSource="Images/Image3.gif"/>
                        </DiscreteObjectKeyFrame.Value>
                     </DiscreteObjectKeyFrames>
                     <DiscreteObjectKeyFrames KeyTime="0:0:0.75">
                        <DiscreteObjectKeyFrame.Value>
                           <BitmapImage UriSource="Images/Image4.gif"/>
                        </DiscreteObjectKeyFrame.Value>
                     </DiscreteObjectKeyFrames>
                     <DiscreteObjectKeyFrames KeyTime="0:0:1">
                        <DiscreteObjectKeyFrame.Value>
                           <BitmapImage UriSource="Images/Image5.gif"/>
                        </DiscreteObjectKeyFrame.Value>
                     </DiscreteObjectKeyFrames>
                  </ObjectAnimationUsingKeyFrames>
               </Storyboard>
            </BeginStoryboard>
         </EventTrigger.Actions>
      </EventTrigger>
   </Image.Triggers>
</Image>

Answer 11

感谢你的帖子Joel，它帮助我解决了WPF缺乏对动画GIF的支持。只需添加一些代码，因为Winforms api设置了pictureBoxLoading.Image属性，因为我有一段时间。

我必须将我的动画gif图像的Build Action设置为“Content”，将Copy to output目录设置为“Copy if newer”或“always”。然后在MainWindow（）中我调用了这个方法。唯一的问题是，当我试图处理流时，它给了我一个红色信封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（这显然会杀死我的动画，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);
   }
}

Answer 12

我上面已经尝试过，但每个人都有自己的缺点，多亏了你们，我自己制作了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并且它会激活gif图像自己的时间线，所以你可以尝试一下。

Answer 13

我建议使用 WebBrowser 控件。

如果 gif 在网络上，您可以在 XAML 中设置源：

<WebBrowser Source="https://media.giphy.com/media/Ent2j55lyQipa/giphy.gif" />

如果是本地文件，您可以从代码隐藏中创建源。

XAML：

<WebBrowser x:Name="WebBrowser" />

代码隐藏：

private void Window_Loaded(object sender, RoutedEventArgs e)
{
    string curDir = Directory.GetCurrentDirectory();
    this.WebBrowser.Source = new Uri(String.Format("file:///{0}/10-monkey.gif", curDir));
}

Answer 14

在WPF中等待动画的另一种方法是：

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

它将显示动画进度条。

Answer 15

检查我的代码，希望对您有所帮助：）

         public async Task GIF_Animation_Pro(string FileName,int speed,bool _Repeat)
                    {
    int ab=0;
                        var gif = GifBitmapDecoder.Create(new Uri(FileName), BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default);
                        var getFrames = gif.Frames;
                        BitmapFrame[] frames = getFrames.ToArray();
                        await Task.Run(() =>
                        {


                            while (ab < getFrames.Count())
                            {
                                Thread.Sleep(speed);
try
{
                                Dispatcher.Invoke(() =>
                                {
                                    gifImage.Source = frames[ab];
                                });
                                if (ab == getFrames.Count - 1&&_Repeat)
                                {
                                    ab = 0;

                                }
                                ab++;
            }
 catch
{
}

                            }
                        });
                    }

或

     public async Task GIF_Animation_Pro(Stream stream, int speed,bool _Repeat)
            {
 int ab = 0;   
                var gif = GifBitmapDecoder.Create(stream , BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default);
                var getFrames = gif.Frames;
                BitmapFrame[] frames = getFrames.ToArray();
                await Task.Run(() =>
                {


                    while (ab < getFrames.Count())
                    {
                        Thread.Sleep(speed);
    try
    {


                     Dispatcher.Invoke(() =>
                        {
                            gifImage.Source = frames[ab];
                        });
                        if (ab == getFrames.Count - 1&&_Repeat)
                        {
                            ab = 0;

                        }
                        ab++;
    }
     catch{} 



                    }
                });
            }

Answer 16

在建议使用 WpfAnimatedGif 的主要回复上添加内容，如果要用Gif交换图片，则必须在最后添加以下几行以确保动画实际执行：

ImageBehavior.SetRepeatBehavior(img, new RepeatBehavior(0));
ImageBehavior.SetRepeatBehavior(img, RepeatBehavior.Forever);

因此您的代码将如下所示：

var image = new BitmapImage();
image.BeginInit();
image.UriSource = new Uri(fileName);
image.EndInit();
ImageBehavior.SetAnimatedSource(img, image);
ImageBehavior.SetRepeatBehavior(img, new RepeatBehavior(0));
ImageBehavior.SetRepeatBehavior(img, RepeatBehavior.Forever);

Answer 17

我不确定这是否已经解决，但最好的方法是使用WpfAnimatedGid library。它非常简单，直接易用。在后面的代码中只需要2行XAML代码和大约5行C＃代码。

您将看到有关如何在此处使用的所有必要细节。这也是我用来代替重新发明轮子

Answer 18

GifImage.Initialize()方法的小改进，它从GIF元数据中读取正确的帧时序。

    private void Initialize()
    {
        _gifDecoder = new GifBitmapDecoder(new Uri("pack://application:,,," + this.GifSource), BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default);

        int duration=0;
        _animation = new Int32AnimationUsingKeyFrames();
        _animation.KeyFrames.Add(new DiscreteInt32KeyFrame(0, KeyTime.FromTimeSpan(new TimeSpan(0))));
        foreach (BitmapFrame frame in _gifDecoder.Frames)
        {
            BitmapMetadata btmd = (BitmapMetadata)frame.Metadata;
            duration += (ushort)btmd.GetQuery("/grctlext/Delay");
            _animation.KeyFrames.Add(new DiscreteInt32KeyFrame(_gifDecoder.Frames.IndexOf(frame)+1, KeyTime.FromTimeSpan(new TimeSpan(duration*100000))));
        }            
         _animation.RepeatBehavior = RepeatBehavior.Forever;
        this.Source = _gifDecoder.Frames[0];            
        _isInitialized = true;
    }

Answer 19

以前，我遇到过类似的问题，我需要在你的项目中播放.gif文件。我有两个选择：

使用WinForms中的PictureBox
使用第三方库，例如codeplex.com.中的WPFAnimatedGif

PictureBox版本对我不起作用，项目无法使用外部库。所以我通过Bitmap帮助ImageAnimator为自己做了这件事。因为，标准BitmapImage不支持播放.gif个文件。

完整示例：

<强> XAML

<Window x:Class="PlayGifHelp.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" Loaded="MainWindow_Loaded">

    <Grid>
        <Image x:Name="SampleImage" />
    </Grid>
</Window>

<强> Code behind

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }

    Bitmap _bitmap;
    BitmapSource _source;

    private BitmapSource GetSource()
    {
        if (_bitmap == null)
        {
            string path = Directory.GetCurrentDirectory();

            // Check the path to the .gif file
            _bitmap = new Bitmap(path + @"\anim.gif");
        }

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

        return Imaging.CreateBitmapSourceFromHBitmap(handle, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
    }

    private void MainWindow_Loaded(object sender, RoutedEventArgs e)
    {
        _source = GetSource();
        SampleImage.Source = _source;
        ImageAnimator.Animate(_bitmap, OnFrameChanged);
    }

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

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

        _source = GetSource();

        SampleImage.Source = _source;
        InvalidateVisual();
    }

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

Bitmap不支持 URI 指令，因此我从当前目录加载.gif文件。

如何在WPF中使用动画gif？

19 个答案: