private void ShowData() { BindingSource src = new BindingSource(); src.DataSource = NhanVienController.GetLuongNV(); dataLuong.DataSource = src; dataLuong.Columns[2].Visible = false; dataLuong.Columns[3].Visible = false; dataLuong.Columns[4].Visible = false; dataLuong.Columns[5].Visible = false; dataLuong.Columns[6].Visible = false; dataLuong.Columns[7].Visible = false; dataLuong.Columns[10].Visible = false; dataLuong.Columns[11].Visible = false; dataLuong.Columns[12].Visible = false; }