图像形式转换

　　　　 //图形转换  Bitmap=>Image

        private System.Windows.Controls.Image Bitmap2Image(System.Drawing.Bitmap Bi)

        {

            MemoryStream ms = new MemoryStream();

            Bi.Save(ms, System.Drawing.Imaging.ImageFormat.Png);

            BitmapImage bImage = new BitmapImage();

            bImage.BeginInit();

            bImage.StreamSource = new MemoryStream(ms.ToArray());

            bImage.EndInit();

            ms.Dispose();

            Bi.Dispose();

            System.Windows.Controls.Image i = new System.Windows.Controls.Image();

            i.Source = bImage;

            return i;

        }

　　　　 //ImageSource给WPF的Image控件设置图片地址

        private System.Windows.Media.ImageSource ConvertDrawingImage2MediaImageSource(System.Drawing.Image image)

        {

            var ms = new MemoryStream();



            var bitmap = new System.Windows.Media.Imaging.BitmapImage();

            bitmap.BeginInit();



            image.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);

            ms.Seek(0, System.IO.SeekOrigin.Begin);

            bitmap.StreamSource = ms;

            bitmap.EndInit();

            return bitmap;

        }

        //将16进制字符串转成Byte[]，这样可以使用MemoryStream来构建图片

        private byte[] strToToHexByte(string hexString)

        {

            hexString = hexString.Replace(" ", "");

            if ((hexString.Length % 2) != 0)

                hexString += " ";

            byte[] returnBytes = new byte[hexString.Length / 2];

            for (int i = 0; i < returnBytes.Length; i++)

                returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16);

            return returnBytes;

        }