[置顶] 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; } } }