FrameworkElement.ActualHeight FrameworkElement.ActualHeight FrameworkElement.ActualHeight FrameworkElement.ActualHeight Property

定義

この要素の描画時の高さを取得します。Gets the rendered height of this element.

public:
 property double ActualHeight { double get(); };
public double ActualHeight { get; }
member this.ActualHeight : double
Public ReadOnly Property ActualHeight As Double

プロパティ値

要素の高さ (デバイスに依存しない単位 (1 単位は 1/96 インチ)device-independent units (1/96th inch per unit) の値)。The element's height, as a value in デバイスに依存しない単位 (1 単位は 1/96 インチ)device-independent units (1/96th inch per unit). 既定値は 0 (ゼロ) です。The default value is 0 (zero).

次の例では、さまざまな高さのプロパティを表示します。The following example displays various height properties.

private void changeHeight(object sender, SelectionChangedEventArgs args)
{
    ListBoxItem li = ((sender as ListBox).SelectedItem as ListBoxItem);
    Double sz1 = Double.Parse(li.Content.ToString());
    rect1.Height = sz1;
    rect1.UpdateLayout();
    txt1.Text= "ActualHeight is set to " + rect1.ActualHeight;
    txt2.Text= "Height is set to " + rect1.Height;
    txt3.Text= "MinHeight is set to " + rect1.MinHeight;
    txt4.Text= "MaxHeight is set to " + rect1.MaxHeight;
}
private void changeMinHeight(object sender, SelectionChangedEventArgs args)
{
    ListBoxItem li = ((sender as ListBox).SelectedItem as ListBoxItem);
    Double sz1 = Double.Parse(li.Content.ToString());
    rect1.MinHeight = sz1;
    rect1.UpdateLayout();
    txt1.Text= "ActualHeight is set to " + rect1.ActualHeight;
    txt2.Text= "Height is set to " + rect1.Height;
    txt3.Text= "MinHeight is set to " + rect1.MinHeight;
    txt4.Text= "MaxHeight is set to " + rect1.MaxHeight;
}
private void changeMaxHeight(object sender, SelectionChangedEventArgs args)
{
    ListBoxItem li = ((sender as ListBox).SelectedItem as ListBoxItem);
    Double sz1 = Double.Parse(li.Content.ToString());
    rect1.MaxHeight = sz1;
    rect1.UpdateLayout();
    txt1.Text= "ActualHeight is set to " + rect1.ActualHeight;
    txt2.Text= "Height is set to " + rect1.Height;
    txt3.Text= "MinHeight is set to " + rect1.MinHeight;
    txt4.Text= "MaxHeight is set to " + rect1.MaxHeight;
}
Private Sub changeHeight(ByVal sender As Object, ByVal args As SelectionChangedEventArgs)
    Dim li As ListBoxItem = CType(CType(sender, ListBox).SelectedItem, ListBoxItem)
    Dim sz1 As Double = Double.Parse(li.Content.ToString())
    rect1.Height = sz1
    rect1.UpdateLayout()
    txt1.Text = "ActualHeight is set to " + rect1.ActualHeight.ToString
    txt2.Text = "Height is set to " + rect1.Height.ToString
    txt3.Text = "MinHeight is set to " + rect1.MinHeight.ToString
    txt4.Text = "MaxHeight is set to " + rect1.MaxHeight.ToString
End Sub
Private Sub changeMinHeight(ByVal sender As Object, ByVal args As SelectionChangedEventArgs)

    Dim li As ListBoxItem = CType(CType(sender, ListBox).SelectedItem, ListBoxItem)
    Dim sz1 As Double = Double.Parse(li.Content.ToString())
    rect1.MinHeight = sz1
    rect1.UpdateLayout()
    txt1.Text = "ActualHeight is set to " + rect1.ActualHeight.ToString
    txt2.Text = "Height is set to " + rect1.Height.ToString
    txt3.Text = "MinHeight is set to " + rect1.MinHeight.ToString
    txt4.Text = "MaxHeight is set to " + rect1.MaxHeight.ToString
End Sub
Private Sub changeMaxHeight(ByVal sender As Object, ByVal args As SelectionChangedEventArgs)

    Dim li As ListBoxItem = CType(CType(sender, ListBox).SelectedItem, ListBoxItem)
    Dim sz1 As Double = Double.Parse(li.Content.ToString())
    rect1.MaxHeight = sz1
    rect1.UpdateLayout()
    txt1.Text = "ActualHeight is set to " + rect1.ActualHeight.ToString
    txt2.Text = "Height is set to " + rect1.Height.ToString
    txt3.Text = "MinHeight is set to " + rect1.MinHeight.ToString
    txt4.Text = "MaxHeight is set to " + rect1.MaxHeight.ToString
End Sub

注釈

このプロパティは、他の高さ入力とレイアウト システムに基づいて計算される値です。This property is a calculated value based on other height inputs, and the layout system. 値は、実際のレンダリング パスに基づいて、レイアウト システム自体によって設定がためとプロパティの設定値の背後にあるなどHeight入力の変更の基準であります。The value is set by the layout system itself, based on an actual rendering pass, and may therefore lag slightly behind the set value of properties such as Height that are the basis of the input change.

ActualHeight注意する必要が、計算した値には、複数存在する可能性がありますまたは増分報告が変更をさまざまな操作の結果として、レイアウト システムによる。Because ActualHeight is a calculated value, you should be aware that there could be multiple or incremental reported changes to it as a result of various operations by the layout system. レイアウト システムが、子要素に必要な測定スペース、親要素による制約などを計算している場合があります。The layout system may be calculating required measure space for child elements, constraints by the parent element, and so on.

このプロパティを設定することはできませんXAMLXAML、基にすることができます、Triggerスタイルでは、その値にします。Although you cannot set this property from XAMLXAML, you can base a Trigger upon its value in a style.

依存プロパティ情報Dependency Property Information

識別子フィールドです。Identifier field ActualHeightProperty
メタデータのプロパティを設定するには trueMetadata properties set to true NoneNone

適用対象