UIElementCollection.Contains(UIElement) UIElementCollection.Contains(UIElement) UIElementCollection.Contains(UIElement) UIElementCollection.Contains(UIElement) Method

Definición

Determina si un elemento especificado se encuentra en la colección 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

Parámetros

element
UIElement UIElement UIElement UIElement

Elemento que se debe buscar.The element to find.

Devoluciones

true si el objeto UIElement especificado se encuentra en la colección; en caso contrario, false.true if the specified UIElement is found in the collection; otherwise, false.

Ejemplos

En el ejemplo siguiente se usa el Contains método para determinar si un determinado UIElement existe dentro de un 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

Se aplica a