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>
时间： 2024-09-29 20:27:52