private void btnAdd_Click(object sender, EventArgs e)
 {
     frmIns_PermitDetail afrmIns_PermitDetail = new frmIns_PermitDetail(this);
     afrmIns_PermitDetail.ShowDialog();
 }
 private void btnInsDetailPermit_ItemClick(object sender, ItemClickEventArgs e)
 {
     try
     {
         frmIns_PermitDetail afrmIns_PermitDetail = new frmIns_PermitDetail();
         afrmIns_PermitDetail.Show();
     }
     catch (Exception ex)
     {
         MessageBox.Show("frmMain.btnInsDetailPermit_ItemClick\n" + ex.ToString(), "Lỗi", MessageBoxButtons.OK, MessageBoxIcon.Error);
     }
 }