ASP.NET MVC 返回文件

将文件写入Response

        public ActionResult Zip()
        {
            string fname = Server.MapPath("~\App_Data\TestDB.zip");

            FileStream fs=new FileStream(fname,FileMode.Open,FileAccess.Read,FileShare.ReadWrite);

            Response.Cache.SetCacheability(HttpCacheability.NoCache);

            Response.ContentType = "application/vnd.android.package-archive";
            Response.AppendHeader("Content-Disposition", "attachment; filename=" + "MyApp.apk");




            Response.AppendHeader("Content-Length", "" + fs.Length);
           
            byte[] bts=new byte[fs.Length];
            fs.Read(bts, 0,(int) fs.Length);
            Response.BinaryWrite(bts);
            return null;
        }

        public ActionResult Zip()
        {
            string fname = Server.MapPath("~\App_Data\bb.zip");

            FileStream fs = new FileStream(fname, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);

            Response.Cache.SetCacheability(HttpCacheability.NoCache);

            Response.ContentType = "application/vnd.android.package-archive";
            Response.AppendHeader("Content-Disposition", "attachment; filename=" + "MyAppb.apk");

            Response.AppendHeader("Content-Length", "" + fs.Length);




            byte[] bts = new byte[fs.Length];
            fs.Read(bts, 0, (int)fs.Length);

            Response.OutputStream.Write(bts,0,bts.Length);
            return null;
        }