hi this is Table Download in database

Id DownLoadTitle Url DownloadToken ExpiryDate Hits ExpireAfterDownload Downloaded

and below is code that connect to this database

  string downloadtoken = Page.RouteData.Values["downloadtoken"].ToString();
        DownloadsDbEntities db = new DownloadsDbEntities();
        var data = from d in db.Downloads
                   where d.DownloadToken == downloadtoken
                   select d;
        Download obj = data.SingleOrDefault();
        if (obj.ExpireAfterDownload.Value)
        {
            if (obj.Downloaded.Value)
            {
                Response.Redirect("~/DownloadError.aspx");
            }
        }
        else
        {
            if (obj.ExpiryDate.Value < DateTime.Now)
            {
                Response.Redirect("~/DownloadError.aspx");
            }
        }
        string path = Server.MapPath(obj.Url);
        FileStream fs = File.OpenRead(path);
        byte[] fileData = new byte[fs.Length];
        fs.Read(fileData, 0, (int)fs.Length);
        Response.Clear();
        Response.AddHeader("Content-Type", "application/zip");
        Response.AddHeader("Content-Disposition", "inline;filename=" + Path.GetFileName(path));
        Response.BinaryWrite(fileData);
        Response.Flush();
        Response.Close();
        if (obj.ExpireAfterDownload.Value)
        {
            obj.Downloaded = true;
            obj.Hits = obj.Hits + 1;
            db.SaveChanges();
        }

but in above code I don't know how it call table from database I never seen this kind of code it doesn't connect to database

can you please help me I want above code but connect to sql and read table Download from database in sql server

How I can do it?

Best regards

Neda