我应该使用什么控件类型-图像，MediaElement等?
当前回答
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);
}
}
其他回答
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);
}
}
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;
}
}
我建议使用WebBrowser控件。
如果gif在网络上，你可以在XAML中设置源代码:
<WebBrowser Source="https://media.giphy.com/media/Ent2j55lyQipa/giphy.gif" />
如果它是一个本地文件，您可以从后台代码创建源代码。
XAML:
<WebBrowser x:Name="WebBrowser" />
后台代码:
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));
}
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。
我发布了一个扩展图像控件和使用Gif解码器的解决方案。gif解码器有一个frames属性。我动画FrameIndex属性。事件ChangingFrameIndex将源属性更改为与FrameIndex对应的帧(在解码器中)。我猜这个动图每秒有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);
}
}
使用示例(XAML):
<controls:GifImage x:Name="gifImage" Stretch="None" GifSource="/SomeImage.gif" AutoStart="True" />
推荐文章
- 删除后面的零
- 从c#读取Excel文件
- 未将相关DLL复制到Visual Studio中的构建输出文件夹
- 存储值为> 24:00:00的.Net Timespan的正确SQL类型是什么?
- 是否有一种使用Dapper调用存储过程的方法?
- UI线程上的任务继续
- 在Visual Studio中设置“首选32位”的目的是什么?它实际上是如何工作的?
- 检查SqlDataReader对象中的列名
- 如何将类标记为已弃用?
- c# 8支持。net框架吗?
- WPF数据绑定:我如何访问“父”数据上下文?
- AutoMapper:“忽略剩下的?”
- 从System.Drawing.Bitmap中加载WPF BitmapImage
- 如何找出一个文件存在于c# / .NET?
- 有可能在pdf中嵌入动画gif吗?
