Expander.Expanded 事件

定義

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

當開啟 Expander 控制項的內容視窗以顯示其標頭及內容時，就會發生這種情況。

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

public event System.Windows.RoutedEventHandler Expanded;

member this.Expanded : System.Windows.RoutedEventHandler

Public Custom Event Expanded As RoutedEventHandler

下列範例示範如何指定事件的事件處理常式 Expanded 。

yourExpander.Expanded += new RoutedEventHandler(expanderHasExpanded);

AddHandler yourExpander.Expanded, AddressOf expanderHasExpanded

<Expander Name ="yourExpander" Expanded="expanderHasExpanded" 
          Header ="expanderTitle" Content="expanderContent"/>

下列範例示範如何定義事件處理常式。

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

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

當屬性從 false 變更為 true 時 IsExpanded ，就會發生此 Expanded 事件。