Article
11/18/2011

DataGridCheckBoxColumn.IsThreeState Property

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Gets or sets a value that indicates whether the hosted CheckBox controls allow three states or two.

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

Syntax

'Declaration
Public Property IsThreeState As Boolean

public bool IsThreeState { get; set; }

<sdk:DataGridCheckBoxColumn IsThreeState="bool"/>

Property Value

Type: System.Boolean
true if the hosted controls support three states; false if they support two states. The default is false.

Examples

The following code example demonstrates how to set the IsThreeState property in XAML. This example is part of a larger example available in the DataGrid class overview.

<sdk:DataGrid x:Name="dataGrid4" 
    Height="160" Margin="0,5,0,10" 
    RowHeight="40" AutoGenerateColumns="False" >    
    <sdk:DataGrid.Columns>
        <sdk:DataGridTextColumn 
            Header="First Name" 
            Width="SizeToHeader"
            Binding="{Binding FirstName}" 
            FontSize="20" />
        <sdk:DataGridTextColumn 
            Header="Last Name" 
            Width="SizeToCells"
            Binding="{Binding LastName}" 
            FontSize="20" />
        <sdk:DataGridTextColumn 
            Header="Address"
            Width="150"
            Binding="{Binding Address}" >
            <sdk:DataGridTextColumn.ElementStyle>
                <Style TargetType="TextBlock">
                    <Setter Property="TextWrapping" Value="Wrap"/>
                </Style>
            </sdk:DataGridTextColumn.ElementStyle>
            <sdk:DataGridTextColumn.EditingElementStyle>
                <Style TargetType="TextBox">
                    <Setter Property="Foreground" Value="Blue"/>
                </Style>
            </sdk:DataGridTextColumn.EditingElementStyle>
        </sdk:DataGridTextColumn>
        <sdk:DataGridCheckBoxColumn 
            Header="New?" 
            Width="40"
            Binding="{Binding IsNew}" />
        <sdk:DataGridCheckBoxColumn 
            Header="Subscribed?" 
            Width="Auto"
            Binding="{Binding IsSubscribed}" 
            IsThreeState="True" />
    </sdk:DataGrid.Columns>
</sdk:DataGrid>

Version Information

Silverlight

Supported in: 5, 4, 3

Platforms

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

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