两种方法：
后端的一般处理程序：Imge.ashx
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Web;
5 using System.Web.UI.WebControls;
6
7 namespace Test
8 {
9 /// <summary>
10 /// Imge 的摘要说明
11 /// </summary>
12 public class Imge : IHttpHandler
13 {
14
15 public void ProcessRequest(HttpContext context)
16 {
17
18 #region 方法一
19 System.IO.MemoryStream ms = new System.IO.MemoryStream();
20 System.IO.Stream str = new FileUpload().PostedFile.InputStream;
21 System.Drawing.Bitmap map = new System.Drawing.Bitmap(str);
22 map.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
23 context.Response.ClearContent();
24 context.Response.ContentType = "image/Jpeg";
25 context.Response.BinaryWrite(ms.ToArray()); //将二进制字节输出到页面
26 #endregion
27
28 #region 方法二
29 System.IO.FileStream fs = new System.IO.FileStream("Filename", System.IO.FileMode.Open, System.IO.FileAccess.Read);
30 byte[] datas = new byte[fs.Length];
31 fs.Read(datas, 0, Convert.ToInt32(fs.Length));
32 fs.Close();
33 context.Response.OutputStream.Write(datas, 0, Convert.ToInt32(fs.Length));
34 context.Response.End();
35 #endregion
36 }
37
38 public bool IsReusable
39 {
40 get
41 {
42 return false;
43 }
44 }
45 }
46 }
HTML页面代码：
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 <img src="/Imge.ashx" /> <!---图片的src指向Imge.ashx 就可以---> 8 </body> 9 </html>
时间： 2024-10-18 08:19:51