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TextBoxBase.ExtentWidth Property

Gets the horizontal size of the visible content area.

Namespace: System.Windows.Controls.Primitives
Assembly: PresentationFramework (in presentationframework.dll)
XML Namespace:  http://schemas.microsoft.com/winfx/2006/xaml/presentation

public double ExtentWidth { get; }
/** @property */
public double get_ExtentWidth ()

public function get ExtentWidth () : double

You cannot use this property in XAML.

Property Value

A floating-point value that specifies the horizontal size of the visible 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 ExtentWidth 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;
}

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0

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