Asp.net利用一般处理程序实现文件下载功能

下载readme.txt文件
 
下载readme.txt文件

using System.IO;
using System.Web;
namespace Zhong.Web
{
 /// 

 /// DownloadFileHandler 的摘要说明
 /// 
 public class DownloadFileHandler : IHttpHandler
 {
  public void ProcessRequest(HttpContext context)
  {
   string filePath = context.Server.MapPath("~/App_Data/readme.txt");
   FileStream fs = new FileStream(filePath, FileMode.Open);
   byte[] bytes = new byte[fs.Length];
   fs.Read(bytes, 0, bytes.Length);
   fs.Dispose();
   context.Response.ContentType = "application/octet-stream";
   context.Response.AddHeader("Content-Disposition", "attachment; filename=readme.txt");
   context.Response.BinaryWrite(bytes);
   context.Response.Flush();
   //大文件下载的解决方案
   //context.Response.ContentType = "application/x-zip-compressed";
   //context.Response.AddHeader("Content-Disposition", "attachment;filename=z.zip");
   //string filename = Server.MapPath("~/App_Data/move.zip");
   //context.Response.TransmitFile(filename);
  }
  public bool IsReusable
  {
   get
   {
    return false;
   }
  }
 }
}