void LoadData()
{
panel1.Enabled = false;
tbxma.ResetText();
tbxten.ResetText();
tbxcmnd.ResetText();
tbxdiachi.ResetText();
tbxtienthuong.ResetText();
tbxsdt.ResetText();
btnluu.Enabled = false;
btnthem.Enabled = true;
btnsua.Enabled = true;
btnxoa.Enabled = true;
btnthoat.Enabled = true;
lstwork = work.GetListWork();
cmbcongviec.DisplayMember = "Name";
cmbcongviec.DataSource = lstwork;
dgvNV.DataSource = nhanvien.GetListEmployee(NameCol, isAscending);
//TinhLuong();
}
