利用C#实现分割GIF图片

 private void btn_load_Click(object sender, EventArgs e)
        {
            Image img = Image.FromFile(textBox1.Text);
            lb_img.Image = img;
        }

        private void btn_split_Click(object sender, EventArgs e)
        {
            string savePath = Application.StartupPath + "\\images\\";
            if (Directory.Exists(savePath))
            {
                Directory.Delete(savePath, true);
            }
            Directory.CreateDirectory(savePath);

            Image img = lb_img.Image;
            //FrameDimension frameDim = new FrameDimension(img.FrameDimensionsList[0]);
            int frame = img.GetFrameCount(FrameDimension.Time);

            while (frame-- > 0)
            {
                img.SelectActiveFrame(FrameDimension.Time, frame);
                img.Save(savePath + "frame_" + frame + ".jpg", ImageFormat.Jpeg);
            }
            if (MessageBox.Show("GIF分割完成,是否打开文件夹?", "提示", MessageBoxButtons.YesNo) == DialogResult.Yes)
            {
                Process.Start(savePath);
            }
        }