C＃：如何将密钥发送到特定控件？

Question

我正在使用{DELETE}助记符但在某些情况下我希望发生默认的删除操作。我以为我可以通过像SendKeys.Send（目标，键）之类的东西来做到这一点，但我找不到这样的选择。

具体来说，如果TextBox具有焦点，我希望进行默认处理（否则我需要自定义处理）。

这是我正在努力解决的代码：

    private void _menuEditDelete_Click(object sender, EventArgs e)
    {
        if (_treeDocumentOutline.Focused)
        {
            DeleteNode();
        }
        else if (_gridAttributes.Focused)
        {
            DeleteSelectedRows();
        }
        else if (_gridAttributes.EditingControl != null && _gridAttributes.EditingControl.Focused)
        {
            // TODO: this is nuts...how to let the grid handle the key?  Losing ability to undo/redo this way
            var box = ((TextBox)_gridAttributes.EditingControl);
            var selectionStart = box.SelectionStart;
            var selectionEnd = box.SelectionStart + Math.Min(Math.Max(1, box.SelectionLength), box.Text.Length - box.SelectionStart);
            box.Text = box.Text.Substring(0, selectionStart) + box.Text.Substring(selectionEnd);
            box.SelectionStart = selectionStart;
            box.SelectionLength = 0;

        }
    }