一个简单的Image图片传递的WebService

转载请标明出处以及作者:

http://blog.csdn.net/Lost_Painting/archive/2010/02/10/5305410.aspx

作者:Lost_Painting

 

   一个简单的WebSerivce传递图片的例子.

WebService中实现了一个方法Getimage(),在内存中生成一张100x100的Bitmap.然后在该Bitmap上画一条线,

再将这个图片转换为byte[]传递给调用者.调用的程式将该byte[]还原为Bitmap.

以下是代码:

WebService:

C# code

   
   

    
    
    
     
    
    using
    
     System; 
    
    using
    
     System.Collections.Generic; 
    
    using
    
     System.Linq; 
    
    using
    
     System.Web; 
    
    using
    
     System.Web.Services; 
    
    using
    
     System.IO; 
    
    using
    
     System.Drawing; 
    
    using
    
     System.Drawing.Imaging; 
    
    namespace
    
     WebService { 
    
    ///
    
     
    
    <summary>
    
     
    
    ///
    
    MyWebService 的摘要描述 
    
    ///
    
     
    
    </summary>
    
     
    
     [WebService(Namespace 
    
    =
    
     
    
    "
    
    http://tempuri.org/
    
    "
    
    )] [WebServiceBinding(ConformsTo 
    
    =
    
     WsiProfiles.BasicProfile1_1)] [System.ComponentModel.ToolBoxItem(
    
    false
    
    )] 
    
    //
    
     若要允許使用 ASP.NET AJAX 從指令碼呼叫此 Web 服務，請取消註解下一行。 
    
    //
    
     [System.Web.Script.Services.ScriptService]
    
     
    
     
    
    public
    
     
    
    class
    
     MyWebService : System.Web.Services.WebService { [WebMethod] 
    
    public
    
     
    
    byte
    
    [] Getimage() { 
    
    //
    
    生成BitMap
    
     
    
     
    
    byte
    
    [] ret 
    
    =
    
     
    
    null
    
    ; Bitmap bm 
    
    =
    
     
    
    new
    
     Bitmap(
    
    100
    
    ,
    
    100
    
    ); 
    
    for
    
     (
    
    int
    
     i 
    
    =
    
     
    
    0
    
    ; i 
    
    <
    
     
    
    100
    
    ; i
    
    ++
    
    ) { bm.SetPixel(i,i,Color.Blue); } 
    
    //
    
    从内存中读取出来存放到返回结果中
    
     
    
     MemoryStream ms 
    
    =
    
     
    
    new
    
     MemoryStream(); ImageCodecInfo[] inf 
    
    =
    
     ImageCodecInfo.GetimageEncoders(); EncoderParameters eps 
    
    =
    
     
    
    new
    
     EncoderParameters(
    
    1
    
    ); Encoder ec 
    
    =
    
     System.Drawing.Imaging.Encoder.ColorDepth; EncoderParameter ep 
    
    =
    
     
    
    new
    
     EncoderParameter(ec,
    
    80
    
    ); eps.Param[
    
    0
    
    ] 
    
    =
    
     ep; bm.Save(ms,inf.First(info 
    
    =>
    
     info.MimeType 
    
    ==
    
     
    
    "
    
    image/bmp
    
    "
    
    ),eps); ret 
    
    =
    
     
    
    new
    
     
    
    byte
    
    [ms.Length]; ret 
    
    =
    
     ms.ToArray(); 
    
    return
    
     ret; } } }
   
   

 
 

  
  调用端是Winform,一个PictureBox,一个Button:
 
 
 
 

  
  using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.IO; namespace WinForm { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender,EventArgs e) { MyWebService.MyWebService ws = new MyWebService.MyWebService(); byte[] b = ws.Getimage(); Bitmap bm = new Bitmap(new MemoryStream(b)); pictureBox1.Image = bm; } } }