byte,bitmap,image互转

/// <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 = null;

　　using (MemoryStream ms= new MemoryStream())             

　　{

     　　 using (Bitmap Bitmap = new Bitmap(Image))                 

　　　　{

                    Bitmap.Save(ms, imageFormat);

                    ms.Position = 0;

                    data = 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();              

　　}          

　　}      

}