怎么让ContextMenuStrip隐藏?

Question

private void mnuContext_Opening(object sender, CancelEventArgs e)
        {
            if (this.dgvUserCheck.SelectedRows.Count == 0)
            {
                MessageBox.Show("请选择一位用户");
            }
        }弹出"请选择一位用户"后,邮件菜单接着又弹出来了,在MessageBox.Show("请选择一位用户");后面加上this.mnuCheck.HideDropDown();也没用一样会显示,咋办呢

Answer 1

private void mnuContext_Opening(object sender, CancelEventArgs e)
        {
            if (this.dgvUserCheck.SelectedRows.Count == 0)
            {
                MessageBox.Show("请选择一位用户");
                e.Cancel=true;
            }
        }