使用codeplex的GifCreator http://gifcreator.codeplex.com 来处理Gif文件
引用库文件Gif.Components.dll
1、把Gif文件转成Png文件
/// <summary>/// 把Gif文件转成Png文件，放在directory目录下/// </summary>/// <param name="file"></param>/// <param name="directory"></param>/// <returns></returns>public static void GifToPngs(string giffile, string directory){GifDecoder gifDecoder = new GifDecoder();directory += "\\";if (!Directory.Exists(directory)){Directory.CreateDirectory(directory);}//读取 gifDecoder.Read(giffile);for (int i = 0, count = gifDecoder.GetFrameCount(); i < count; i++){Image frame = gifDecoder.GetFrame(i); // frame iframe.Save(directory + "\\" + i.ToString("d2") + ".png", ImageFormat.Png);//转成jpg//frame.Save(directory + "\\" + i.ToString("d2") + ".jpg", ImageFormat.Jpeg); }}
2、把多张Png文件转成Gif文件
/// <summary>/// 把directory文件夹里的png文件生成为gif文件，放在giffile/// </summary>/// <param name="directory">png文件夹</param>/// <param name="giffile">gif保存路径</param>/// <param name="time">每帧的时间/ms</param>/// <param name="repeat">是否重复</param>public static void PngsToGif(string directory, string giffile, int time, bool repeat){//一般文件名按顺序排string[] pngfiles = Directory.GetFileSystemEntries(directory, "*.png");AnimatedGifEncoder e = new AnimatedGifEncoder();e.Start(giffile);//每帧播放时间e.SetDelay(500);//-1：不重复，0：重复e.SetRepeat(repeat?0:-1);for (int i = 0, count = pngfiles.Length; i < count; i++){e.AddFrame(Image.FromFile(pngfiles[i]));}e.Finish();}
由于Gif的转换和生成速度比较慢，所以一般放在新的线程进行操作
库文件
http://files.cnblogs.com/bomo/Gif.Components.zip
