protected void btnUpload_Click(object sender, EventArgs e)
    {
        ctl_newbuilding insert     = new ctl_newbuilding();
        String          folderUser = Server.MapPath("~/uploadimages/thuvienanh/");

        if (!Directory.Exists(folderUser))
        {
            Directory.CreateDirectory(folderUser);
        }
        string             filename;
        string             ulr = "/uploadimages/thuvienanh/";
        HttpFileCollection hfc = Request.Files;

        for (int i = 0; i < hfc.Count; i++)
        {
            HttpPostedFile hpf = hfc[i];
            if (hpf.ContentLength > 0)
            {
                //string filename = Path.GetRandomFileName() + Path.GetExtension(FileUpload1.FileName);
                //filename = ulr + System.IO.Path.GetFileName(cls_ToAscii.ToAscii(hpf.FileName).ToLower());
                filename = ulr + Path.GetRandomFileName() + Path.GetExtension(hpf.FileName);
                string path = HttpContext.Current.Server.MapPath("~/" + filename);
                hpf.SaveAs(path);
                VaryQualityLevel(System.Drawing.Image.FromStream(hpf.InputStream), path);
                insert.InsertImageOneProduct(filename);
            }
        }
        rpImageListing.DataSource = from i in db.tbCollectionImages select i;
        rpImageListing.DataBind();
        foreach (RepeaterItem item in rpImageListing.Items)
        {
            HtmlGenericControl control = item.FindControl("divSub") as HtmlGenericControl;
            if (control != null)
            {
                //set the control value here.
            }
        }
        //divMes.InnerHtml = mes;
        //Session["re_id"] = null;
        cls_Alert.alert_Success(Page, "Đã lưu thành công", "");
        loadData();
    }