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.NET Framework Class Library
FrameworkElementDataContextChanged Event

Occurs when the data context for this element changes.

Namespace:   System.Windows
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
Public Event DataContextChanged As [%$TOPIC/ms596556_en-us_VS_110_1_0_0_0_0%]
public event [%$TOPIC/ms596556_en-us_VS_110_1_0_1_0_0%] DataContextChanged
public:
 event [%$TOPIC/ms596556_en-us_VS_110_1_0_2_0_0%]^ DataContextChanged {
	void add ([%$TOPIC/ms596556_en-us_VS_110_1_0_2_0_1%]^ value);
	void remove ([%$TOPIC/ms596556_en-us_VS_110_1_0_2_0_2%]^ value);
}
member DataContextChanged : IEvent<[%$TOPIC/ms596556_en-us_VS_110_1_0_3_0_0%],
    [%$TOPIC/ms596556_en-us_VS_110_1_0_3_0_1%]>
<object DataContextChanged="[%$TOPIC/ms596556_en-us_VS_110_1_0_4_0_0%]" .../>
Remarks

For an explanation of data contexts and data binding, see Data Binding Overview.

Important noteImportant

When the DataContext for an element changes, all data-bound properties on this element are potentially affected. This applies to any elements that are child elements of the current element in the logical tree, which inherit the data context, and also the current element itself. All such existing bindings must re-interpret the new DataContext and will reevaluate the binding results. The data binding engine is not deterministic about the order of these reevaluations, relative to the raising of the DataContextChanged event. The reevaluations can occur before the event, after the event, or in any mixture.

Version Information

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
Platforms

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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