前台页面：
<!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> <script src="jQuery.1.7.1.1/Content/Scripts/jquery-1.7.1.js" type="text/javascript"></script></head><body> <form method="POST" enctype="multipart/form-data" action="Upload.ashx"> <input type="file" name="imgFile" /> <input type="submit" value="上传"/></form></body></html>后台的Upload.ashx处理界面代码：
using System;
using System.Collections.Generic;using System.Drawing.Imaging;using System.Linq;using System.Web;using System.IO;using System.Drawing;namespace 新闻小案例._2015_4_19{ /// <summary> /// Upload 的摘要说明 /// </summary> public class Upload : IHttpHandler {public void ProcessRequest(HttpContext context)
{ context.Response.ContentType = "text/html"; //获取前台请求的文件 HttpPostedFile file1 = context.Request.Files["imgFile"]; //指定类型为图片类型 string file2 = Path.GetExtension(file1.FileName); if (file2 == ".jpg" || file2 == ".png") { string path1 = "/2015-4-19/" + Guid.NewGuid() + file1.FileName; file1.SaveAs(context.Request.MapPath(path1)); string str1 = string.Format("<html><head></head><body><img src='{0}'/></body></html>", path1); context.Response.Write(str1); } else { context.Response.Write("格式不符"); }}
}