private void LoadDanhMuc(int CuaHangid, int NhomChaID) { NhomSanPham nsp = new NhomSanPham(); DataSet ds = nsp.SelectNhomSanPhamNotInCuaHangbyCuaHangID(CuaHangid, NhomChaID); DataRow[] selectedRows = ds.Tables[0].Select("Show=true"); grdCat.DataSource = ds; grdCat.DataBind(); //return selectedRows.Length; }