public void addVePhong()
{
dgvTS.DataSource = null;
if (cbbKhoa.SelectedItem.ToString() == "Tat ca" && cbbPhong.SelectedItem.ToString() == "Tat ca")
{
dgvTS.DataSource = bll.GetInfoTSAllPhong_BLL();
stt(dgvTS);
}
if (cbbKhoa.SelectedItem.ToString() != "Tat ca" && cbbPhong.SelectedItem.ToString() == "Tat ca")
{
string makhoa = bll.GetMaKhoa_BLL(cbbKhoa.SelectedItem.ToString());
dgvTS.DataSource = bll.GetinfoTScua1khoa_BLL(makhoa);
stt(dgvTS);
}
if (cbbKhoa.SelectedItem.ToString() != "Tat ca" && cbbPhong.SelectedItem.ToString() != "Tat ca")
{
string maphong = bll.GetMaPhong_BLL(cbbPhong.SelectedItem.ToString());
dgvTS.DataSource = bll.GetInfoTSOnePhong_BLL(maphong);
stt(dgvTS);
}
}