///图片转二进制 private byte[] convertByte(Image img) {     MemoryStream ms = new MemoryStream();     img.Save(ms, img.RawFormat);     //byte[] bytes = new byte[ms.Length];     //ms.Read(bytes, 0, Convert.ToInt32(ms.Length));     //以上两句改成下面两句     byte[] bytes = ms.ToArray();     ms.Close();     return bytes; } ///二进制生成图片 private Image convertImg(byte[] datas) {     MemoryStream ms = new MemoryStream(datas);     Image img = Image.FromStream(ms, true);     ms.Close();     return img; }