ListBoxItem.Unselected 事件

定义

命名空间:

System.Windows.Controls

程序集:

PresentationFramework.dll

在取消选择 ListBoxItem 时发生。

public:
 event System::Windows::RoutedEventHandler ^ Unselected;

public event System.Windows.RoutedEventHandler Unselected;

member this.Unselected : System.Windows.RoutedEventHandler 

Public Custom Event Unselected As RoutedEventHandler 

事件类型

RoutedEventHandler

示例

以下示例演示如何订阅和处理此事件。

<ListBoxItem Name="lbi0" Selected="OnSelected" Unselected="OnUnselected">Item 0</ListBoxItem>

private void OnUnselected(object sender, RoutedEventArgs e)
{
    ListBoxItem lbi = e.Source as ListBoxItem;

    if (lbi != null)
    {
        label1.Content = lbi.Content.ToString() + " is unselected.";
    }
}

Private Sub OnUnselected(ByVal sender As Object, ByVal e As RoutedEventArgs)
    Dim lbi As ListBoxItem = TryCast(e.Source, ListBoxItem)

    If lbi IsNot Nothing Then
        label1.Content = lbi.Content.ToString() & " is unselected."
    End If
End Sub

注解

若要了解所选内容何时 ListBox 发生更改，请侦 SelectionChanged 听 事件。

路由事件信息

标识符字段	UnselectedEvent
路由策略	鼓 泡
委托	RoutedEventHandler