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Proprietà FrameworkElement.DataContext

Gets or sets the data context for an element when it participates in data binding. This is a dependency property.

Spazio dei nomi: System.Windows
Assembly: PresentationFramework (in presentationframework.dll)
Spazio dei nomi XML:  http://schemas.microsoft.com/winfx/2006/xaml/presentation

[LocalizabilityAttribute(LocalizationCategory.NeverLocalize)] 
public Object DataContext { get; set; }
/** @property */
public Object get_DataContext ()

/** @property */
public void set_DataContext (Object value)

public function get DataContext () : Object

public function set DataContext (value : Object)

<object>
  <object.DataContext>
    <dataContextObject />
  </object.DataContext>
</object>
<object DataContext="bindingUsage"/>
- or -
<object DataContext="{resourceExtension contextResourceKey}"/>
 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 derived class. 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. 

Valore proprietà

The object to use as data context.

Identifier field

DataContextProperty

Metadata properties set to true

Inherits

Data context is a concept that allows elements to inherit information from their parent elements about the data 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 without other values for DataContext established through local values or styles, then 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 typically 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 use code to set DataContext.

The following example illustrates how a data context acts on a binding and provides the information that defines the specific values of bound proeprties.

  <Window.Resources>
    <ObjectDataProvider x:Key="MyList" ObjectType="{x:Type src:LeagueList}" />
...

  </Window.Resources>
...

  <DockPanel DataContext="{Binding Source={StaticResource MyList}}">

Microsoft .NET Framework 3.0 è supportato in Windows Vista, Microsoft Windows XP SP2 e Windows Server 2003 SP1.

.NET Framework

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