private void btn_add_Click(object sender, EventArgs e)
{
var obj = new MaintenancePerson(Action.Add);
obj.DefineControlVisible(new User());
obj.ShowDialog();
DisplayUsers();
}
private void btn_edit_Click(object sender, EventArgs e)
{
var selectedId = (int)UserData.SelectedRows[0].Cells[0].Value;
var user = GetUser(selectedId);
var obj = new MaintenancePerson(Action.Edit, user);
obj.DefineControlVisible(new User());
obj.ShowDialog();
DisplayUsers();
}