private void btnSuaHang_Click(object sender, EventArgs e)
{
frmSuaHang frmSH = new frmSuaHang();
frmSH.ShowDialog();
loadDuLieu();
}
private void btnSuaHang2_Click(object sender, EventArgs e)
{
Hang h = new Hang();
h.MaHang = dgvHang.SelectedRows[0].Cells[0].Value.ToString();
frmSuaHang formSuaHang = new frmSuaHang(h);
formSuaHang.ShowDialog();
loadDuLieu();
}