private void FillData()
 {
     try
     {
         Admins vcontroller = new Admins();
         Entities.SanPham vsanpham = new Entities.SanPham();
         Entities.Size vsize = new Entities.Size();
         Entities.SanPham_Size vsanpham_size = new Entities.SanPham_Size();
         string errMsg = string.Empty;
         string[] listid = Convert.ToString(Request.QueryString["ID"]).Split(new char[] { ',' });
         int masp = Convert.ToInt32(listid[0]);
         int masize = Convert.ToInt32(listid[1]);
         vsanpham = vcontroller.getby_sanpham(masp.ToString(), ref errMsg);
         lbltensanpham.Text = vsanpham.TenSP;
         vsize = vcontroller.getby_size_ID(masize.ToString(), ref errMsg);
         lblsize.Text = vsize.Size1;
         vsanpham_size = vcontroller.getby_sanpham_size(masp, masize, ref errMsg);
         txtsoluong.Text = vsanpham_size.Soluong.ToString();
     }
     catch (Exception ex) { Response.Write(ex.Message); }
 }