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

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

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

Response.Clear();

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

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

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

Response.WriteFile(file.FullName);

Response.End();

public void down(string cc)

{

if (cc != "")

{

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

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

if (file.Exists)

{

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

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

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

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

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

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

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

}

else

{

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

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

}

}

}