TextBoxBase.ViewportHeight プロパティ

定義

スクロール可能なコンテンツ エリアの縦のサイズを取得します。Gets the vertical size of the scrollable content area.

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

プロパティ値

Double

スクロール可能なコンテンツ エリアの縦幅を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) で指定する浮動小数点値。A floating-point value that specifies the vertical size of the scrollable content area, 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).

スクロールをサポートするようにテキスト編集コントロールが構成されていない場合、このプロパティの値は 0.0 になります。The value of this property is 0.0 if the text editing control is not configured to support scrolling.

このプロパティには既定値はありません。This property has no default value.

次の例は、ViewportHeight プロパティの値を読み取る方法を示しています。The following example demonstrates how to read the value of the ViewportHeight property.

private void initValues(object sender, EventArgs e)
{
    myTB1.Text= "ExtentHeight is currently " + myTextBox.ExtentHeight.ToString();
    myTB2.Text= "ExtentWidth is currently " + myTextBox.ExtentWidth.ToString();
    myTB3.Text= "HorizontalOffset is currently " + myTextBox.HorizontalOffset.ToString();
    myTB4.Text= "VerticalOffset is currently " + myTextBox.VerticalOffset.ToString();
    myTB5.Text = "ViewportHeight is currently " + myTextBox.ViewportHeight.ToString();
    myTB6.Text = "ViewportWidth is currently " + myTextBox.ViewportWidth.ToString();
    radiobtn1.IsChecked = true;
}
Private Sub initValues(ByVal sender As Object, ByVal e As EventArgs)
    myTB1.Text = "ExtentHeight is currently " + myTextBox.ExtentHeight.ToString()
    myTB2.Text = "ExtentWidth is currently " + myTextBox.ExtentWidth.ToString()
    myTB3.Text = "HorizontalOffset is currently " + myTextBox.HorizontalOffset.ToString()
    myTB4.Text = "VerticalOffset is currently " + myTextBox.VerticalOffset.ToString()
    myTB5.Text = "ViewportHeight is currently " + myTextBox.ViewportHeight.ToString()
    myTB6.Text = "ViewportWidth is currently " + myTextBox.ViewportWidth.ToString()
    radiobtn1.IsChecked = True

適用対象

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