以流的方式下载文件，隐藏实际的下载路径

转自： http://dev.mjxy.cn/a-Download-the-file-to-stream-download-hide-the-real-path.aspx

以流的方式下载文件，隐藏实际的下载路径
 

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01	string path = Server.MapPath("~/UploadFiles/" + "a.doc");

02	System.IO.FileInfo file = new System.IO.FileInfo(path);

03

04	Response.Clear();

05	Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);

06

07	Response.AddHeader("Content-Length", file.Length.ToString());

08	Response.ContentType = "application/octet-stream";

09	Response.WriteFile(file.FullName);

10	Response.End();

11

12	public void down(string cc)

13

{

14	if (cc != "")

15

{

16

17	string path = System.Web.HttpContext.Current.Server.MapPath(cc);

18	System.IO.FileInfo file = new System.IO.FileInfo(path);

19	if (file.Exists)

20

{

21	System.Web.HttpContext.Current.Response.Clear();

22	System.Web.HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);

23

24	System.Web.HttpContext.Current.Response.AddHeader("Content-Length", file.Length.ToString());

25

26	System.Web.HttpContext.Current.Response.ContentType = "application/octet-stream";

27

28	System.Web.HttpContext.Current.Response.Filter.Close();

29	System.Web.HttpContext.Current.Response.WriteFile(file.FullName);

30	System.Web.HttpContext.Current.Response.End();

31

}

32

else

33

{

34	System.Web.HttpContext.Current.Response.Write("文件不存在");

35	System.Web.HttpContext.Current.Response.End();

36

}

37

}

38

}