Winforms Devexpress PopupContainerEdit弹出窗口始终打开

我正在使用winform DevXPress库。 现在需要基于PopupContainerEdit创建一个控件，但是这个控件必须有一些行为，比如当它聚焦时，弹出窗口打开，当失去焦点时，弹出窗口关闭

这是我正在使用的代码，但是在获得焦点后弹出窗口会消失

public class HelpEdit : PopupContainerEdit {
    private PopupContainerControl _container;
    private GridControl _gridControl;
    private GridView _gridView;

    [DefaultValue("")]
    [DXCategory("Data")]
    [AttributeProvider(typeof(IListSource))]
    public object Datasource {
        get { return _gridControl.DataSource; }
        set { _gridControl.DataSource = value; }
    }

    public HelpEdit() : base() {
        _container = new PopupContainerControl();
        this.Properties.TextEditStyle = DevExpress.XtraEditors.Controls.TextEditStyles.Standard;
        this._gridControl = new GridControl();
        this._gridControl.Dock = DockStyle.Fill;
        this._gridView = new GridView(_gridControl);
        _container.Controls.Add(_gridControl);
        _container.Size = new Size(this.Width, 250);

        this.Properties.PopupControl = _container;
        this.Properties.PopupControl.Size = new Size(this.Width, 250);
    }
    protected override void OnGotFocus(EventArgs e) {
        base.OnGotFocus(e);
        this.ShowPopup();
    }
    protected override void OnLostFocus(EventArgs e) {
        base.OnLostFocus(e);
        this.ClosePopup();
    }
}

---

弹出窗口消失，因为一旦弹出容器控件（

\u container

）获得焦点，它就会被代码关闭。您不应该在OnLostFocus（）覆盖中关闭弹出窗口，因为

PopupContainerEdit

的

base.OnLostFocus

方法已包含用于关闭弹出窗口的正确代码。或使用以下代码有条件地关闭弹出窗口：

protected override void OnLostFocus(EventArgs e) {
    if(IsPopupOpen && !EditorContainsFocus) 
        ClosePopup(PopupCloseMode.Immediate);
    base.OnLostFocus(e);
}