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DataTrigger.Binding Property

Gets or sets the binding that produces the property value of the data object.

Namespace:  System.Windows
Assembly:  PresentationFramework (in PresentationFramework.dll)

[LocalizabilityAttribute(LocalizationCategory.None, Readability = Readability.Unreadable)]
public BindingBase Binding { get; set; }
    <Binding …/>
<object property="{Binding declaration}"/>

XAML Values


Zero or more attribute-assignment clauses separated by commas (,). See Binding Markup Extension for more information.

Property Value

Type: System.Windows.Data.BindingBase
The default value is null.

The property value produced by this binding is compared with the value specified by the Value property. That value is first converted to the type of the value of the binding (if possible), and then the two values are compared using the Object.Equals method. If the two values are equal, then the associated actions or setters are applied.

You create a binding and use the Path property to bind to a property of a certain object (the binding source object). For example, you may bind to the Priority property of a Task. For more information, see Data Binding Overview.

Note that you must specify both the Binding and Value properties on a DataTrigger for the data trigger to be meaningful. If one or both of the properties are not set, an exception is thrown.

In the following example, the DataTrigger sets the BorderBrush of the element named border to Yellow if the TaskType property is TaskType.Home.

<DataTemplate x:Key="myTaskTemplate">


  <DataTrigger Binding="{Binding Path=TaskType}">
    <Setter TargetName="border" Property="BorderBrush" Value="Yellow"/>



For a detailed discussion of this example, see Data Templating Overview.

.NET Framework

Supported in: 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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