The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

ToggleButton.IsThreeState Property

Gets or sets whether the control supports two or three states.

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

public bool IsThreeState { get; set; }
<togglebutton IsThreeState="bool"/>

XAML Values


A literal ToggleButton, or a derived type such as CheckBox or RadioButton.

Property Value

Type: System.Boolean
true if the control supports three states; otherwise, false. The default is false.

Dependency property identifier field: IsThreeStateProperty

The IsChecked property can be set to null as a third state when IsThreeState is true.

The following example shows how to create a three-state ToggleButton control.

<ToggleButton Margin="5" Content="Three State" Width="150" IsThreeState="True"/>
<ToggleButton Margin="5" Content="Two State" Width="150" IsThreeState="False" />


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Was this page helpful?
(1500 characters remaining)
Thank you for your feedback

Community Additions

© 2014 Microsoft