UIElementCollection.Contains(UIElement) Yöntem

Tanım

Belirtilen öğenin içinde olup olmadığını belirler UIElementCollection .Determines whether a specified element is in the UIElementCollection.

public:
 virtual bool Contains(System::Windows::UIElement ^ element);
public virtual bool Contains (System.Windows.UIElement element);
abstract member Contains : System.Windows.UIElement -> bool
override this.Contains : System.Windows.UIElement -> bool
Public Overridable Function Contains (element As UIElement) As Boolean

Parametreler

element
UIElement

Bulunacak öğe.The element to find.

Döndürülenler

Boolean

true Eğer belirtilen UIElement koleksiyonda bulunursa, aksi durumda false .true if the specified UIElement is found in the collection; otherwise, false.

Örnekler

Aşağıdaki örnek, Contains bir içinde belirli bir varolup olmadığını anlamak için yöntemini kullanır UIElement UIElementCollection .The following example uses the Contains method to determine if a specific UIElement exists within a UIElementCollection.

void ContainsElement(object sender, RoutedEventArgs e)
{
    TextBlock txt1 = new TextBlock();
    sp1.Children.Add(txt1);
    txt1.Text = "This StackPanel contains UIElement btn1: " + sp1.Children.Contains(btn1).ToString();
}
Private Sub ClearButtons(ByVal sender As Object, ByVal e As MouseButtonEventArgs)
    sp1.Children.Clear()
    btn = New Button()
    btn.Content = "Click to clear"
    sp1.Children.Add(btn)
    AddHandler btn.Click, AddressOf Me.ClearControls
    btn1 = New Button()
    btn1.Content = "Click to clear"
    sp1.Children.Add(btn1)
    AddHandler btn1.Click, AddressOf Me.ClearControls
    btn2 = New Button()
    btn2.Content = "Click to clear"
    sp1.Children.Add(btn2)
    AddHandler btn2.Click, AddressOf Me.ClearControls
    btn3 = New Button()
    btn3.Content = "Click to clear"
    sp1.Children.Add(btn3)
    AddHandler btn3.Click, AddressOf Me.ClearControls
End Sub

Private Sub ClearControls(ByVal sender As Object, ByVal e As RoutedEventArgs)
    sp1.Children.Clear()
End Sub

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