Expander.Collapsed 事件

定义

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

在 Expander 控件的内容窗口关闭且只有 Header 可见时发生。

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

public event System.Windows.RoutedEventHandler Collapsed;

member this.Collapsed : System.Windows.RoutedEventHandler

Public Custom Event Collapsed As RoutedEventHandler

以下示例演示如何为 Collapsed 事件指定事件处理程序。

myExpander.Collapsed += new RoutedEventHandler(expanderHasCollapsed);

AddHandler myExpander.Collapsed, AddressOf expanderHasCollapsed

<Expander Name ="myExpander" Collapsed="expanderHasCollapsed" 
          Header ="expanderTitle" Content="expanderContent"/>

以下示例演示如何定义事件处理程序。

private void expanderHasCollapsed(object sender, RoutedEventArgs args)
{
    //Do something when the Expander control collapses
}

Private Sub expanderHasCollapsed(ByVal sender As Object, ByVal args As RoutedEventArgs)
    'Do something when the Expander control collapses
End Sub

当Collapsed属性从 truefalse更改为时IsExpanded发生该事件。