Byte[]、Image、Bitmap 之间的相互转换

/// <summary>
       /// 将图片Image转换成Byte[]
       /// </summary>
       /// <param name="Image">image对象</param>
       /// <param name="imageFormat">后缀名</param>
       /// <returns></returns>
       public static byte[] ImageToBytes(Image Image, System.Drawing.Imaging.ImageFormat imageFormat)
       {

           if (Image == null) { return null; }

           byte[] data = http://www.cnblogs.com/peasana/archive/2012/02/13/null;

           using (MemoryStream ms= new MemoryStream())
           {

                using (Bitmap Bitmap = new Bitmap(Image))
               {

                    Bitmap.Save(ms, imageFormat);

                   ms.Position = 0;

                    data = http://www.cnblogs.com/peasana/archive/2012/02/13/new byte[ms.Length];

                   ms.Read(data, 0, Convert.ToInt32(ms.Length));

                   ms.Flush();

               }

           }

           return data;

       }

            /// <summary>
           /// byte[]转换成Image
           /// </summary>
           /// <param name="byteArrayIn">二进制图片流</param>
           /// <returns>Image</returns>
           public static System.Drawing.Image byteArrayToImage(byte[] byteArrayIn)
           {
               if (byteArrayIn == null)
                   return null;
               using (System.IO.MemoryStream ms = new System.IO.MemoryStream(byteArrayIn))
               {
                   System.Drawing.Image returnImage = System.Drawing.Image.FromStream(ms);
                   ms.Flush();
                   return returnImage;
               }
           }

    //Image转换Bitmap

   1. Bitmap img = new Bitmap(imgSelect.Image);

   2. Bitmap bmp = (Bitmap)pictureBox1.Image;

//Bitmap转换成Image

using System.IO;

private static 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 ;
       }

//byte[] 转换 Bitmap
public static Bitmap BytesToBitmap(byte[] Bytes)
       {
           MemoryStream stream = null;
           try
           {
               stream = new MemoryStream(Bytes);
               return new Bitmap((Image)new Bitmap(stream));
           }
           catch (ArgumentNullException ex)
           {
               throw ex;
           }
           catch (ArgumentException ex)
           {
               throw ex;
           }
           finally
           {
               stream.Close();
           }
       } 

//Bitmap转byte[] 
       public static byte[] BitmapToBytes(Bitmap Bitmap)
       {
           MemoryStream ms = null;
           try
           {
               ms = new MemoryStream();
               Bitmap.Save(ms, Bitmap.RawFormat);
               byte[] byteImage = new Byte[ms.Length];
               byteImage = ms.ToArray();
               return byteImage;
           }
           catch (ArgumentNullException ex)
           {
               throw ex;
           }
           finally
           {
               ms.Close();
           }
       }
   }