Web Forms :: Download Selected Files As Zip Archive

i want to download selected file in a zip and it work but problem is it include all folder and i want add only one folder which is the name of that movie.

 i have used the code 

protected void btnDownload_Click(object sender, EventArgs e) { using (ZipFile zip = new ZipFile()) { foreach (GridViewRow gvrow in GridView1.Rows) { CheckBox chk = (CheckBox)gvrow.FindControl("chkSelect"); if (chk.Checked) {

string filePath = Server.MapPath(gvrow.Cells[2].Text); zip.AddFile(filePath); } } Response.Clear(); Random r = new Random(); Response.AddHeader("content-disposition", "filename=" + "download" + r.Next(100, 1000).ToString() + ".zip"); // Response.AddHeader("Content-Disposition", "attachment; filename=DownloadedFile.zip"); Response.ContentType = "application/zip"; zip.Save(Response.OutputStream); Response.End(); }

and in the zip has all folder whatever has in my project.i want only files inside zip and don't want any folder .