//import question for phase private void btn_ImportQuestion_Click(object sender, EventArgs e) { if (lb_Phase.SelectedItem==null) { MessageBox.Show("Vui lòng chọn giai đoạn","Cảnh báo", MessageBoxButtons.OK, MessageBoxIcon.Warning); } else { int idPhase = 0; Phase.IDContest = IdContest; List<Phase> ListPhase; ListPhase = phaseBL.GetPhaseByIDContest(Phase); if (ListPhase != null) { for (int i = 0; i < ListPhase.Count; i++) { if (ListPhase.ElementAt(i).NamePhase == lb_Phase.SelectedItem.ToString()) { idPhase = ListPhase.ElementAt(i).IDPhase; } } } GetQuestion getQuestion = new GetQuestion(idPhase,IdContest); getQuestion.ShowDialog(); load(); } }