Gets or sets the data context for an element when it participates in data binding. This is a dependency property.
(in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation
Visual Basic (Declaration)
<LocalizabilityAttribute(LocalizationCategory.NeverLocalize)> _
Public Property DataContext As Object
Dim instance As FrameworkContentElement
Dim value As Object
value = instance.DataContext
instance.DataContext = value
[LocalizabilityAttribute(LocalizationCategory.NeverLocalize)]
public Object DataContext { get; set; }
[LocalizabilityAttribute(LocalizationCategory::NeverLocalize)]
public:
property Object^ DataContext {
Object^ get ();
void set (Object^ value);
}
public function get DataContext () : Object
public function set DataContext (value : Object)
XAML Property Element Usage
<object>
<object.DataContext>
<dataContextObject />
</object.DataContext>
</object>
<object DataContext="bindingUsage"/>
- or -
<object DataContext="{resourceExtension contextResourceKey}"/>
XAML Values
- dataContextObject
A directly embedded object that serves as data context for any bindings within the parent element. Typically, this object is a Binding or another BindingBase subclass. Alternatively, raw data of any CLR object type intended for binding may be placed here, with the actual bindings defined later.
- bindingUsage
A binding usage that evaluates to an appropriate data context. For details, see Binding Markup Extension.
- resourceExtension
One of the following: StaticResource, or DynamicResource. This usage is used when referring to raw data defined as an object in resources. See Resources Overview.
- contextResourceKey
The key identifier for the object being requested from within a ResourceDictionary.
Dependency Property Information
Data context is a concept that allows elements to inherit information from their parent elements about the binding source that is used for binding, as well as other characteristics of the binding such as the path.
Data context can be set directly to a common language runtime (CLR) object, with the bindings evaluating to properties of that object. Alternatively, you can set the data context to a DataSourceProvider object.
This dependency property inherits property values. If there are child elements with no other value for DataContext established through local values or styles, the property system will set the value to be the DataContext value of the nearest parent element with this value assigned.
Alternatively, you can use one of the following properties of the Binding class to specify the binding source explicitly: ElementName, Source, or RelativeSource. For more information, see How to: Specify the Binding Source.
In XAML, DataContext is most commonly set to as a Binding declaration. You can use either property element syntax or attribute syntax. Attribute syntax is shown in the example on this page. You can also set DataContext in code.
The following example sets a binding on a Paragraph element, by creating a new custom data object, establishing that object as DataContext, and setting the binding path to a property within it.
MyData myDataObject = new MyData();
myflowdocument.DataContext = myDataObject;
introParagraph.SetBinding(Paragraph.TagProperty, "CustomData");
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.
.NET Framework
Supported in: 3.5, 3.0
Reference
Other Resources