本文共 3297 字，大约阅读时间需要 10 分钟。
注：本工程来codeproject WPF默认的IMAGE是无法让GIF文件动起来的。
下面为一种可以让GIF在WPF中动起来的办法。
关键还在AnimatedGIFControl.cs文件中。
- /****************************** Module Header ******************************\
- Module Name: AnimatedGIFControl.cs
- Project: CSWPFAnimatedGIF
- Copyright (c) Microsoft Corporation.
-
- The CSWPFAnimatedGIF demonstrates how to implement
- an animated GIF image in WPF.
-
- This source is subject to the Microsoft Public License.
- See http://www.microsoft.com/opensource/licenses.mspx#Ms-PL.
- All other rights reserved.
-
- THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND,
- EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
- WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE.
- \***************************************************************************/
-
- using System;
- using System.Drawing;
- using System.Runtime.InteropServices;
- using System.Windows;
- using System.Windows.Interop;
- using System.Windows.Media.Imaging;
- using System.Windows.Threading;
-
- namespace CSWPFAnimatedGIF
- {
- public class AnimatedGIFControl : System.Windows.Controls.Image
- {
- private Bitmap _bitmap; // Local bitmap member to cache image resource
- private BitmapSource _bitmapSource;
- public delegate void FrameUpdatedEventHandler();
-
-
- ///
- /// Delete local bitmap resource
- /// Reference: http://msdn.microsoft.com/en-us/library/dd183539(VS.85).aspx
- ///
- [DllImport("gdi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
- static extern bool DeleteObject(IntPtr hObject);
-
- ///
- /// Override the OnInitialized method
- ///
- protected override void OnInitialized(EventArgs e)
- {
- base.OnInitialized(e);
- this.Loaded += new RoutedEventHandler(AnimatedGIFControl_Loaded);
- this.Unloaded += new RoutedEventHandler(AnimatedGIFControl_Unloaded);
- }
-
- ///
- /// Load the embedded image for the Image.Source
- ///
- void AnimatedGIFControl_Loaded(object sender, RoutedEventArgs e)
- {
- // Get GIF image from Resources
- if (Properties.Resources.ProgressIndicator != null)
- {
- _bitmap = Properties.Resources.ProgressIndicator;
- Width = _bitmap.Width;
- Height = _bitmap.Height;
-
- _bitmapSource = GetBitmapSource();
- Source = _bitmapSource;
- }
- }
-
- ///
- /// Close the FileStream to unlock the GIF file
- ///
- private void AnimatedGIFControl_Unloaded(object sender, RoutedEventArgs e)
- {
- StopAnimate();
- }
-
- ///
- /// Start animation
- ///
- public void StartAnimate()
- {
- ImageAnimator.Animate(_bitmap, OnFrameChanged);
- }
-
- ///
- /// Stop animation
- ///
- public void StopAnimate()
- {
- ImageAnimator.StopAnimate(_bitmap, OnFrameChanged);
- }
-
- ///
- /// Event handler for the frame changed
- ///
- private void OnFrameChanged(object sender, EventArgs e)
- {
- Dispatcher.BeginInvoke(DispatcherPriority.Normal,
- new FrameUpdatedEventHandler(FrameUpdatedCallback));
- }
-
- private void FrameUpdatedCallback()
- {
- ImageAnimator.UpdateFrames();
-
- if (_bitmapSource != null)
- _bitmapSource.Freeze();
-
- // Convert the bitmap to BitmapSource that can be display in WPF Visual Tree
- _bitmapSource = GetBitmapSource();
- Source = _bitmapSource;
- InvalidateVisual();
- }
-
- private BitmapSource GetBitmapSource()
- {
- IntPtr handle = IntPtr.Zero;
-
- try
- {
- handle = _bitmap.GetHbitmap();
- _bitmapSource = Imaging.CreateBitmapSourceFromHBitmap(
- handle, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
- }
- finally
- {
- if (handle != IntPtr.Zero)
- DeleteObject(handle);
- }
-
- return _bitmapSource;
- }
-
- }
- }
测试工程代码：
转载地址：http://mnkum.baihongyu.com/