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ASP.NET C# 文件下载

2015-12-23 10:18 831 查看
1.文件下载到客户端

//WriteFile实现下载

protected void Download_Click(object sender, EventArgs e)
{
  string fileName = "20151223Test.doc";//客户端保存的文件名
  //string filePath = Server.MapPath("DownLoad/aaa.txt");//路径
  string filePath = Server.MapPath(@"files\test.doc");//路径

  FileInfo fileInfo = new FileInfo(filePath);
  Response.Clear();
  Response.ClearContent();
  Response.ClearHeaders();
  Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName);
  Response.AddHeader("Content-Length", fileInfo.Length.ToString());
  Response.AddHeader("Content-Transfer-Encoding", "binary");
  Response.ContentType = "application/octet-stream";
  //Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
  Response.ContentEncoding = System.Text.Encoding.UTF8;
  Response.WriteFile(fileInfo.FullName);
  Response.Flush();
  Response.End();
}

//TransmitFile实现下载
protected void DownLoadTF_Click(object sender, EventArgs e)
{

  Response.ContentType = "application/x-zip-compressed";
  Response.AddHeader("Content-Disposition", "attachment;filename=z.zip");
  string filename = Server.MapPath(@"files\DownloadsText.zip");
  Response.TransmitFile(filename);
  //Response.TransmitFile 需要 :Microsoft .NET Framework 1.1 Service Pack 1 支持!!
}

//流方式下载
protected void DownLoadFL_Click(object sender, EventArgs e)
{
  string fileName = "20151223aaa.doc";//客户端保存的文件名
  //string filePath = Server.MapPath("DownLoad/aaa.txt");//路径
  string filePath = Server.MapPath(@"files\租户装修手册-印象城.doc");//路径

  //以字符流的形式下载文件
  using (FileStream fs = new FileStream(filePath, FileMode.Open))
  {
    byte[] bytes = new byte[(int)fs.Length];
    fs.Read(bytes, 0, bytes.Length);

    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();
  }
}

//流方式下载 2
protected void DownLoadFL2_Click(object sender, EventArgs e)
{
  string fileName = "20151223aaa.doc";//客户端保存的文件名
  //string filePath = Server.MapPath("DownLoad/aaa.txt");//路径
  string filePath = Server.MapPath(@"files\租户装修手册-印象城.doc");//路径

  //以字符流的形式下载文件
  using (FileStream fs = new FileStream(filePath, FileMode.OpenOrCreate, FileAccess.ReadWrite))
  {
    byte[] bytes = new byte[(int)fs.Length];
    using (BinaryWriter bw = new BinaryWriter(fs))
    {
      bw.Write(bytes);
      bw.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();
    }
  }
}
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