C#中将图片转化为byte[]在数据库中存取

1. 写入数据库：

 

   
   
   
   

    
    
    
     
    
    
    
    public
    
    
    
     
    
    
    
    static
    
    
    
     
    
    
    
    byte
    
    
    
    [] GetBytesByImage(PictureBox pb) { 
    
    
    
    byte
    
    
    
    [] photo_byte
    
    
    
    =
    
    
    
     
    
    
    
    null
    
    
    
    ; 
    
    
    
    if
    
    
    
     (
    
    
    
    !
    
    
    
    pb.Image.Equals(
    
    
    
    null
    
    
    
    )) { 
    
    
    
    using
    
    
    
     (MemoryStream ms 
    
    
    
    =
    
    
    
     
    
    
    
    new
    
    
    
     MemoryStream()) { Bitmap bmp 
    
    
    
    =
    
    
    
     
    
    
    
    new
    
    
    
     Bitmap(pb.Image); bmp.Save(ms,System.Drawing.Imaging.ImageFormat.Jpeg); photo_byte 
    
    
    
    =
    
    
    
     
    
    
    
    new
    
    
    
     
    
    
    
    byte
    
    
    
    [ms.Length]; ms.Position 
    
    
    
    =
    
    
    
     
    
    
    
    0
    
    
    
    ; ms.Read(photo_byte, 
    
    
    
    0
    
    
    
    , Convert.ToInt32(ms.Length)); bmp.Dispose(); } } 
    
    
    
    return
    
    
    
     photo_byte; } 
   
   
   
   

2.将实际位置中的照片转化为byte[]类型写入数据库中：

 

 

   
   
   
   

    
    
    
     
    
    
    
    public
    
    
    
     
    
    
    
    static
    
    
    
     
    
    
    
    byte
    
    
    
    [] GetBytesByImagePath(
    
    
    
    string
    
    
    
     strFile) { 
    
    
    
    byte
    
    
    
    [] photo_byte 
    
    
    
    =
    
    
    
     
    
    
    
    null
    
    
    
    ; 
    
    
    
    using
    
    
    
     (FileStream fs 
    
    
    
    =
    
    
    
     
    
    
    
    new
    
    
    
     FileStream(strFile, FileMode.Open, FileAccess.Read)) { 
    
    
    
    using
    
    
    
     (BinaryReader br 
    
    
    
    =
    
    
    
     
    
    
    
    new
    
    
    
     BinaryReader(fs)) { photo_byte 
    
    
    
    =
    
    
    
     br.ReadBytes((
    
    
    
    int
    
    
    
    )fs.Length); } } 
    
    
    
    return
    
    
    
     photo_byte; }
   
   
   
   

3. 读取byte[]并转化为图片：

 

 

   
   
   
   

    
    
    
     
    
    
    
    public
    
    
    
     
    
    
    
    static
    
    
    
     Image GetImageByBytes(
    
    
    
    byte
    
    
    
    [] bytes) { Image photo 
    
    
    
    =
    
    
    
     
    
    
    
    null
    
    
    
    ; 
    
    
    
    using
    
    
    
     (MemoryStream ms 
    
    
    
    =
    
    
    
     
    
    
    
    new
    
    
    
     MemoryStream(bytes)) { ms.Write(bytes, 
    
    
    
    0
    
    
    
    , bytes.Length); photo 
    
    
    
    =
    
    
    
     Image.FromStream(ms, 
    
    
    
    true
    
    
    
    ); } 
    
    
    
    return
    
    
    
     photo; }