动态图片显示控件----------WinForm控件开发系列

PictureBox 控件无法显示gif格式的图片，该控件是继承于 Control 基类开发的。该控件利用.NET自带 ImageAnimator 类来处理图片的帧。如下：

 1         /// <summary>   
 2         /// 开始循环播放动态图片   
 3         /// </summary>   
 4         private void StartAnimation()
 5         {
 6             lock (this.Image)
 7             {
 8                 ImageAnimator.Animate(this.Image, new EventHandler(this.FrameChanged));
 9 
10 
11                 if (!this.DesignMode)
12                 {
13                     this.OnFrameIndexChanged(new FrameIndexChangedEventArgs() { FrameIndex = currentFrame });
14                 }
15             }
16         }
17 
18         /// <summary>   
19         /// 停止循环播放动态图片  
20         /// </summary>   
21         private void StopAnimation()
22         {
23             lock (this.Image)
24             {
25                 ImageAnimator.StopAnimate(this.Image, new EventHandler(this.FrameChanged));
26                 this.resetProperty();
27 
28                 if (!this.DesignMode)
29                 {
30                     this.OnFrameIndexChanged(new FrameIndexChangedEventArgs() { FrameIndex = currentFrame });
31                 }
32             }
33         }
34 
35         /// <summary>
36         /// 重置图片信息
37         /// </summary>
38         private void resetProperty()
39         {
40             this.frameDimension = null;
41             this.isAnimation = false;
42             this.frameCount = 0;
43             this.currentFrame = -1;
44         }
45 
46         /// <summary>
47         /// 当前帧更改事件
48         /// </summary>
49         /// <param name="sender"></param>
50         /// <param name="e"></param>
51         private void FrameChanged(object sender, EventArgs e)
52         {
53             this.currentFrame = this.currentFrame + 1 >= this.frameCount ? 0 : this.currentFrame + 1;
54             lock (this.image)
55             {
56                 this.image.SelectActiveFrame(this.frameDimension, this.currentFrame);
57                 this.Invalidate();
58             }
59         }