基于C#实现12306的动态验证码变成静态验证码的方法

Image imgGif = Image.FromFile(Application.StartupPath + @"/getPassCodeNew.gif");FrameDimension ImgFrmDim = new FrameDimension(imgGif.FrameDimensionsList[0]);System.Drawing.Bitmap bp = new Bitmap(imgGif.Size.Width, imgGif.Size.Height);int nFrameCount = imgGif.GetFrameCount(ImgFrmDim);for (int i = 0; i < nFrameCount; i++){imgGif.SelectActiveFrame(ImgFrmDim, i);System.Drawing.Bitmap nbp = new Bitmap(imgGif);Color dd = nbp.GetPixel(1, 1);if (i == 0){for (int x = 0; x < nbp.Width; x++){for (int y = 0; y < nbp.Height; y++){bp.SetPixel(x, y, dd);}}}for (int x = 0; x < nbp.Width; x++){for (int y = 0; y < nbp.Height; y++){Color c = nbp.GetPixel(x, y);if (c == dd) continue;bp.SetPixel(x, y, c);}}}bp.Save(Application.StartupPath + @"/Frame.jpg", ImageFormat.Bmp);