TextBoxBase.VerticalOffset 屬性

定義

命名空間:

System.Windows.Controls.Primitives

組件:

PresentationFramework.dll

取得或設定垂直捲軸位置。

public:
 property double VerticalOffset { double get(); };

public double VerticalOffset { get; }

member this.VerticalOffset : double

Public ReadOnly Property VerticalOffset As Double

屬性值

Double

浮點數值指定垂直滾動位置，單位與裝置無關（每單位 1/96 英吋）。

設定此屬性會使文字編輯控制項捲動至指定的垂直偏移量。 讀取此屬性後，會回傳當前的垂直偏移量。

若文字編輯控制項未設定支援捲動，該屬性的值為 0.0。

此房產無預設價值。

例外狀況

ArgumentException

嘗試將此屬性設定為負值。

範例

以下範例說明如何判斷該房產的價值 VerticalOffset 。

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

備註

垂直偏移量是從可見文字區域的頂部開始測量的。

另請參閱

• HorizontalOffset
• HorizontalScrollBarVisibility
• VerticalScrollBarVisibility
• ScrollToEnd()
• ScrollToHome()