TextBoxBase.ViewportHeight Property


Gets the vertical size of the scrollable content area.

Namespace:   System.Windows.Controls.Primitives
Assembly:  PresentationFramework (in PresentationFramework.dll)

Public ReadOnly Property ViewportHeight As Double

Property Value

Type: System.Double

A floating-point value that specifies the vertical size of the scrollable content area, in device-independent units (1/96th inch per unit).

The value of this property is 0.0 if the text editing control is not configured to support scrolling.

This property has no default value.

The following example demonstrates how to read the value of the ViewportHeight property.

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

.NET Framework
Available since 3.0
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