private void btnAddCustomerGroup_Click(object sender, System.EventArgs e)
 {
     try
     {
         string NameCompany = lueCompany.Text;
         if (NameCompany.Equals("--- Chọn lựa ---") || NameCompany.Equals(""))
         {
             lueCompany.Text = "--- Chọn lựa ---";
             MessageBox.Show("Vui lòng chọn công ty .", "Thông báo", MessageBoxButtons.OK, MessageBoxIcon.Information);
         }
         else
         {
             int IDCompany = Convert.ToInt32(lueCompany.EditValue.ToString());
             frmIns_CustomerGroups afrmIns_CustomerGroups = new frmIns_CustomerGroups(this, IDCompany, NameCompany);
             afrmIns_CustomerGroups.Show();
         }
     }
     catch (Exception ex)
     {
         MessageBox.Show("frmTsk_BookingHall_Group.btnAddCustomerGroup_Click\n" + ex.ToString(), "Thông báo", MessageBoxButtons.OK, MessageBoxIcon.Error);
     }
 }
 private void btnInsCustomerGroup_ItemClick(object sender, ItemClickEventArgs e)
 {
     try
     {
         frmIns_CustomerGroups afrmIns_CustomerGroups = new frmIns_CustomerGroups();
         afrmIns_CustomerGroups.Show();
     }
     catch (Exception ex)
     {
         MessageBox.Show("frmMain.btnInsCustomerGroup_ItemClick\n" + ex.ToString(), "Lỗi", MessageBoxButtons.OK, MessageBoxIcon.Error);
     }
 }