void Completed(object sende, EventArgs e)
{
QLThuebaoDomainContext db = new QLThuebaoDomainContext();
EntityQuery<SLGanDB> Query = db.GetSLGanDBQuery();
LoadOperation<SLGanDB> LoadOp = db.Load(Query.Where(p => App.nhomtd.Contains(p.ma_huyen)).OrderBy(p => p.ma_huyen).OrderBy(p => p.ten_tuyen), LoadOp_Complete, null);
}