RADDropDownListElement 不包含定义 'Owner'

Question

我使用 VS2013 和 Telerik WinControls。UI\v4.0_2015.1.331.40。我想编译我的应用程序。我收到以下错误消息：RADDropDownListElement 不包含定义 'Owner'...

这个组件有什么变化？我该如何解决？

密码是：

void SVDropDownList_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Delete)
            {
                if (sender is RadDropDownListElement && (sender as RadDropDownListElement).Owner is RadDropDownList)
                {
                    /* Alleen SelectedValue op null zetten werkt niet altijd */
                    ClearItem();
                    //((sender as RadDropDownListElement).Owner as RadDropDownList).SelectedValue = null;
                }
            }
            else if (e.Control && e.KeyCode == Keys.C)
            {
                if (sender is RadDropDownListElement && (sender as RadDropDownListElement).Owner is RadDropDownList)
                {
                    string text = ((sender as RadDropDownListElement).Owner as RadDropDownList).Text;

                    if (!string.IsNullOrEmpty(text))
                        Clipboard.SetText(text);
                }
            }
        }

Answer 1

访问控件的方法如下：

(sender as RadDropDownListElement).ElementTree.Control

RADDropDownListElement 不包含定义 'Owner'

RADDropDownListElement does not contain a definition 'Owner'

c#

telerik

winforms