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标题: 关于文件下载 [打印本页]

作者: 老皮鞋 时间: 2013-8-6 13:22
标题: 关于文件下载
我在登陆页放了个Window1窗体，然后进行校验密码对了可以下载为失效，如果直接把下载代码放在pageload事件又可以，放在按钮事件一点动静都没有
using System;
using System.Collections.Generic;
using System.IO;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Configuration;
using FineUI;

namespace Others
{
public partial class GetFile : System.Web.UI.Page
{
      protected void Page_Load(object sender, EventArgs e)
      {
         //DownFile();
         //TransmitFile();
      }

      private void DownFile()
      {

         string fileName = ConfigurationManager.AppSettings["File"];// "项目申报表.docx";
         string filePath = System.Web.HttpContext.Current.Request.PhysicalApplicationPath + ConfigurationManager.AppSettings["Path"] + "\\" + ConfigurationManager.AppSettings["File"];
         if (System.IO.File.Exists(filePath))
         {
            //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.Clear();
            Response.ClearContent();
            Response.ClearHeaders();

            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();
         }

      }

      private void TransmitFile()
      {
         /*
         微软为Response对象提供了一个新的方法TransmitFile来解决使用Response.BinaryWrite
         下载超过400mb的文件时导致Aspnet_wp.exe进程回收而无法成功下载的问题。
         代码如下：
         */
         string fileName = ConfigurationManager.AppSettings["File"];// "项目申报表.docx";
         string filePath = System.Web.HttpContext.Current.Request.PhysicalApplicationPath + ConfigurationManager.AppSettings["Path"] + "\\" + ConfigurationManager.AppSettings["File"];
         Response.Clear();
         Response.ClearContent();
         Response.ClearHeaders();
         Response.ContentType = "application/x-zip-compressed";
         Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName);

         //string filename = Server.MapPath("DownLoad/aaa.zip");
         Response.TransmitFile(filePath);
      }

      private bool CheckLog()
      {
         return true;
      }

      protected void btnLogin_Click(object sender, EventArgs e)
      {
         if (CheckLog())
         {
            Label1.Text = "正在下载请稍后...";
            DownFile();
            // TransmitFile();
            Window1.Hidden = true;
         }
         else
         {
            Alert.Show("用户名或密码错误！");
         }
      }
}
}

作者: sanshi 时间: 2013-8-6 13:48
看这篇文章：http://www.cnblogs.com/sanshi/archive/2012/11/20/2778332.html

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