将图片的二进制字节字符串在HTML页面以图片形式输出

具体实现代码如下：

1、新建一个一般处理程序： Image.ashx

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Web;
 5 using System.Net;
 6 using System.Drawing.Imaging;
 7 using System.IO;
 8 
 9 namespace Test
10 {
11     /// <summary>
12     ///测试图片以二进制字节输出到HTML页面（显示成图片）
13     /// </summary>
14     public class Image : IHttpHandler
15     {
16 
17         public void ProcessRequest(HttpContext context)
18         {
19             //方法一：
20             //WebRequest wreq = WebRequest.Create("http://img.baidu.com/video/img/video_logo_new.gif");
21             //HttpWebResponse wresp = (HttpWebResponse)wreq.GetResponse();
22             //Stream s = wresp.GetResponseStream();
23             //System.Drawing.Image img;
24             //img = System.Drawing.Image.FromStream(s);
25             ////下面直接输出
26             //MemoryStream ms = new MemoryStream();
27             //img.Dispose();
28 
29             //关键代码
30             //context.Response.ClearContent();
31             //context.Response.ContentType = "image/gif";
32             //context.Response.BinaryWrite(ms.ToArray());
33 
34             //方法二：
35             WebClient my = new WebClient();
36             byte[] mybyte;
37             mybyte = my.DownloadData("http://img.baidu.com/video/img/video_logo_new.gif"); 
38             MemoryStream ms = new MemoryStream(mybyte);
39             System.Drawing.Image img;
40             img = System.Drawing.Image.FromStream(ms);
41             //关键代码
42             context.Response.ClearContent();
43             context.Response.ContentType = "image/gif";
44             context.Response.BinaryWrite(mybyte); 
45         }
46 
47         public bool IsReusable
48         {
49             get
50             {
51                 return false;
52             }
53         }
54     }
55 }

2、新建一个HTML页面：ImageTest.htm

 1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 2 <html xmlns="http://www.w3.org/1999/xhtml">
 3 <head>
 4     <title></title>
 5 </head>
 6 <body>
 7 使用：Response.BinaryWrite 二进制字符串方式输出图片：<br />
 8 主要：图片 img标签路径(src)要指向那个(Image.ashx)一般处理程序<br />
 9 <img  src="Image.ashx"/>
10 </body>
11 </html>