CheckBox Class (System.Windows.Controls)

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.NET Development
.NET Framework 3.5
.NET Framework Class Library
System.Windows.Controls Namespace

CheckBox Class

CheckBox Members
CheckBox Constructor
CheckBox Methods
CheckBox Properties
CheckBox Events

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CheckBox Class
This page is specific to:.NET Framework Version:3.03.5Silverlight 3 4.0

.NET Framework Class Library

CheckBox Class

Updated: February 2009

Represents a control that a user can select and clear.

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

Syntax

C++

JScript

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'Usage

Dim instance As CheckBox

'Declaration

<LocalizabilityAttribute(LocalizationCategory.CheckBox)> _
Public Class CheckBox _
    Inherits ToggleButton

XAML Object Element Usage

<CheckBox>
  Content
</CheckBox>

Remarks

CheckBox controls inherit from ToggleButton and can have three states: checked (selected), unchecked (cleared), and indeterminate.

Content Model: CheckBox is a ContentControl. Its content property is Content. For more information on the content model for CheckBox, see Controls Content Model Overview.

Dependency properties for this control might be set by the control’s default style. If a property is set by a default style, the property might change from its default value when the control appears in the application. The default style is determined by which desktop theme is used when the application is running. For more information, see Themes.

Examples

The following example creates a CheckBox and handles the Checked, Unchecked, and Indeterminate events.

XAML

<Grid>
  <Grid.RowDefinitions>
    <RowDefinition Height="Auto"/>
    <RowDefinition Height="Auto"/>
    <RowDefinition Height="Auto"/>
  </Grid.RowDefinitions>

  <TextBlock Text="CheckBox Demonstration" Margin="0,20,10,20"
             FontFamily="Verdana" FontSize="18" FontWeight="Bold"
             Foreground="#FF5C9AC9" Grid.Row="0"/>

  <CheckBox x:Name="cb1" Grid.Row="1" Margin="5,0,0,0" 
            Content="Three-state CheckBox" IsThreeState="True"
            Checked="HandleCheck" Unchecked="HandleUnchecked" 
            Indeterminate="HandleThirdState" />
  <TextBlock x:Name="text1" Grid.Row="2" Margin="5,0,0,0" />
</Grid>

C++

JScript

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Private Sub HandleCheck(ByVal sender As Object, ByVal e As RoutedEventArgs)
    text1.Text = "The CheckBox is checked."
End Sub

Private Sub HandleUnchecked(ByVal sender As Object, ByVal e As RoutedEventArgs)
    text1.Text = "The CheckBox is unchecked."
End Sub

Private Sub HandleThirdState(ByVal sender As Object, ByVal e As RoutedEventArgs)
    text1.Text = "The CheckBox is in the indeterminate state."
End Sub

Inheritance Hierarchy

System..::.Object
  System.Windows.Threading..::.DispatcherObject
    System.Windows..::.DependencyObject
      System.Windows.Media..::.Visual
        System.Windows..::.UIElement
          System.Windows..::.FrameworkElement
            System.Windows.Controls..::.Control
              System.Windows.Controls..::.ContentControl
                System.Windows.Controls.Primitives..::.ButtonBase
                  System.Windows.Controls.Primitives..::.ToggleButton
                    System.Windows.Controls..::.CheckBox

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Platforms

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

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

Version Information

.NET Framework

Supported in: 3.5, 3.0

Reference

CheckBox Members

System.Windows.Controls Namespace

Other Resources

WPF Controls Gallery Sample

Change History

Date	History	Reason
February 2009	Described how default styles change dependency properties.	Customer feedback.
October 2008	Added new example.	Customer feedback.

Date

History

Reason

February 2009

Described how default styles change dependency properties.

Customer feedback.

October 2008

Added new example.

Customer feedback.