Question

我正在使用winform DevExpress库。现在需要创建一个基于PopupContainerEdit的控件，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，当弹出窗口关闭时失去焦点。

这是我正在使用的代码，但在获得焦点后弹出dessapears。

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();
    }
}

Answer 1

弹出容器控件（_container）获得焦点时，弹出窗口会因代码关闭而弹出窗口消失。您不应该在OnLostFocus（）覆盖中关闭弹出窗口，因为base.OnLostFocus的{{1}}方法已包含用于关闭弹出窗口的正确代码。或者使用以下代码有条件地关闭弹出窗口：

PopupContainerEdit

Devexpress PopupContainerEdit弹出窗口始终打开

1 个答案: