private void frmMain_Load(object sender, EventArgs e)
{
NhanVienDAL nhanVienDAL = new NhanVienDAL();
NHAN_VIEN nv = nhanVienDAL.GetDVByUsername(this.username);
nhanVienNhomDAL nhanVienNhomDAL = new nhanVienNhomDAL();
NHAN_VIEN_NHOM nvn = nhanVienNhomDAL.GetDVByMaNV(nv.MA_NV);
phanQuyenDAL phanQuyenDAL = new phanQuyenDAL();
List <PHAN_QUYEN> pq = phanQuyenDAL.GetListBuNhom(nvn.MA_NHOM);
foreach (NavBarGroup nav in navBarControl.Groups)
{
if (nav is NavBarGroup)
{
nav.Visible = find(Int32.Parse(nav.Tag.ToString()), pq);
}
}
}