TextBoxBase.VerticalOffset TextBoxBase.VerticalOffset TextBoxBase.VerticalOffset TextBoxBase.VerticalOffset Property

定义

获取或设置垂直滚动条的位置。Gets or sets the vertical scroll position.

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

属性值

一个浮点值,该值指定垂直滚动位置(以与设备无关的单位(每个单位 1/96 英寸)device-independent units (1/96th inch per unit)为单位)。A floating-point value that specifies the vertical scroll position, in 与设备无关的单位(每个单位 1/96 英寸)device-independent units (1/96th inch per unit).

设置此属性会导致文本编辑控件滚动到指定的垂直偏移。Setting this property causes the text editing control to scroll to the specified vertical offset. 读取此属性将返回当前垂直偏移。Reading this property returns the current vertical offset.

如果文本编辑控件未配置为支持滚动,则此属性的值为 0.0。The value of this property is 0.0 if the text editing control is not configured to support scrolling.

此属性没有默认值。This property has no default value.

异常

尝试将此属性设置为负值。An attempt is made to set this property to a negative value.

示例

下面的示例演示如何读取VerticalOffset属性的值。The following example demonstrates how to read the value of the VerticalOffset 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

注解

垂直偏移量从可见文本区域的顶部测量。The vertical offset is measured from the top of the visible text area.

适用于

另请参阅