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ToggleButton.IsChecked Property

Gets or sets whether the ToggleButton is checked.

Namespace:  System.Windows.Controls.Primitives
Assembly:  PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation

[LocalizabilityAttribute(LocalizationCategory.None, Readability = Readability.Unreadable)]
[TypeConverterAttribute(typeof(NullableBoolConverter))]
public Nullable<bool> IsChecked { get; set; }
<object IsChecked="Boolean"/>- or -<object IsChecked="{x:Null Markup Extension}"/>

Property Value

Type: System.Nullable<Boolean>
true if the ToggleButton is checked; false if the ToggleButton is unchecked; otherwise null. The default is false.

Identifier field

IsCheckedProperty

Metadata properties set to true

BindsTwoWayByDefault

A control that inherits from ToggleButton determines its behavior when this property is null.

CheckBox

When the IsThreeState property is set to true, a user can click a CheckBox to pick three possible states. The following table describes the three states of a CheckBox.

State of the CheckBox

Value of IsChecked

Checked

true

Unchecked

false

Indeterminate

null

If IsThreeState is false, you can still programmatically set this property to null to put the CheckBox in an indeterminate state, but the user cannot set the CheckBox to the indeterminate state through the user interface (UI).

RadioButton

If you set this property to null on a RadioButton, the RadioButton is unchecked.

The following example creates a CheckBox set to an indeterminate state.

<CheckBox Name="checkBox1" IsThreeState="True" 
          IsChecked="{x:Null}">
  A CheckBox in an indeterminate state
</CheckBox>

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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