将图片的二进制字节字符串在HTML页面以图片形式输出

时间：2023-03-09 12:57:57
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

 using System;

 using System.Collections.Generic;

 using System.Linq;

 using System.Web;

 using System.Net;

 using System.Drawing.Imaging;

 using System.IO;

 namespace Test

 {

     /// <summary>

     ///测试图片以二进制字节输出到HTML页面（显示成图片）

     /// </summary>

     public class Image : IHttpHandler

     {

         public void ProcessRequest(HttpContext context)

         {

             //方法一：

             //WebRequest wreq = WebRequest.Create("http://img.baidu.com/video/img/video_logo_new.gif");

             //HttpWebResponse wresp = (HttpWebResponse)wreq.GetResponse();

             //Stream s = wresp.GetResponseStream();

             //System.Drawing.Image img;

             //img = System.Drawing.Image.FromStream(s);

             ////下面直接输出

             //MemoryStream ms = new MemoryStream();

             //img.Dispose();

             //关键代码

             //context.Response.ClearContent();

             //context.Response.ContentType = "image/gif";

             //context.Response.BinaryWrite(ms.ToArray());

             //方法二：

             WebClient my = new WebClient();

             byte[] mybyte;

             mybyte = my.DownloadData("http://img.baidu.com/video/img/video_logo_new.gif");

             MemoryStream ms = new MemoryStream(mybyte);

             System.Drawing.Image img;

             img = System.Drawing.Image.FromStream(ms);

             //关键代码

             context.Response.ClearContent();

             context.Response.ContentType = "image/gif";

             context.Response.BinaryWrite(mybyte);

         }

         public bool IsReusable

         {

             get

             {

                 return false;

             }

         }

     }

 }

2、新建一个HTML页面：ImageTest.htm

 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

 <html xmlns="http://www.w3.org/1999/xhtml">

 <head>

     <title></title>

 </head>

 <body>

 使用：Response.BinaryWrite 二进制字符串方式输出图片：<br />

 主要：图片 img标签路径(src)要指向那个(Image.ashx)一般处理程序<br />

 <img  src="Image.ashx"/>

 </body>

 </html>

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