共用方式為

TextBoxBase.ViewportHeight 屬性

  • 參考

定義

命名空間:
System.Windows.Controls.Primitives
組件:
PresentationFramework.dll

取得可捲動內容區域的垂直大小。

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

屬性值

Double

浮點數，指定可捲動內容區域的垂直大小，以裝置獨立單位 (每單位 1/96 英吋) 。

如果沒有設定文字編輯控制項支援捲動，則這個屬性的值為 0.0。

此屬性沒有預設值。

範例

下列範例示範如何讀取 屬性的值 ViewportHeight 。

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

適用於

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