C#实现文件上传及文件下载功能实例代码

废话不多说了，直接给大家贴代码了，具体代码如下所示：

public actionresult upload()
    {
      // var pathurl = "http://" + request.url.authority;
      var file = request.files["filedata"];
      var uploadfilename = file.filename;
      string filepath = "/file/" + uploadfilename;
      string absolutepath = server.mappath(filepath);
      file.saveas(absolutepath);       //将上传的东西保存     
      return json(new { filename = uploadfilename, filepath = filepath });
    }

public actionresult download(string filename)
    {
      string filename = filename;//客户端保存的文件名 
      string filepath = server.mappath("/file/"+ filename);//路径    
                                 //以字符流的形式下载文件   
      filestream fs = new filestream(filepath, filemode.open);
      byte[] bytes = new byte[(int)fs.length];
      fs.read(bytes, 0, bytes.length);
      fs.close();
      response.contenttype = "application/octet-stream";
      //通知浏览器下载文件而不是打开  
      response.addheader("content-disposition", "attachment; filename=" + httputility.urlencode(filename, system.text.encoding.utf8));
      response.binarywrite(bytes);
      response.flush();
      response.end();
      return json("");
    }

总结

以上所述是小编给大家介绍的c#实现文件上传及文件下载功能实例代码，希望对大家有所帮助