public DataTable GetTreeTheoGiaoVien(string NamHoc, int IDNS_GiaoVien, int IDDM_NamHoc, int HocKy)
{
var client = new UnimOsServiceClient();
DataTable dt = ConvertList.ToDataTable <sp_DM_Lop_GetTreeByIDGiaoVienResult>(client.cDDM_Lop_GetTreeByIDGiaoVien(GlobalVar.MaXacThuc, NamHoc, IDNS_GiaoVien, IDDM_NamHoc, HocKy));
client.Close();
return(CreateTree(dt));
}