Visual.VisualChildrenCount 屬性

定義

命名空間:

System.Windows.Media

組件:

PresentationCore.dll

取得 Visual 的子項目數量。

protected:
 virtual property int VisualChildrenCount { int get(); };

protected virtual int VisualChildrenCount { get; }

member this.VisualChildrenCount : int

Protected Overridable ReadOnly Property VisualChildrenCount As Integer

屬性值

Int32

子項目數量。

範例

下列範例會定義 覆寫的 實作 VisualChildrenCount 。

// Provide a required override for the VisualChildrenCount property.
protected override int VisualChildrenCount
{
    get { return _children.Count; }
}

' Provide a required override for the VisualChildrenCount property.
Protected Overrides ReadOnly Property VisualChildrenCount() As Integer
    Get
        Return _children.Count
    End Get
End Property

備註

根據預設，沒有 Visual 子系。 因此，預設實作一律會傳回 0。

給繼承者的注意事項

衍生自 Visual 的類別必須覆寫此屬性，以及 GetVisualChild(Int32) 方法，才能正確列舉視覺化樹狀結構。