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Represents a DSL model element that exposes property changing/changed events.
Namespace: Microsoft.VisualStudio.SharePoint
Assembly: Microsoft.VisualStudio.SharePoint (in Microsoft.VisualStudio.SharePoint.dll)
Syntax
'Declaration
Public Interface IObservableModelElement
public interface IObservableModelElement
The IObservableModelElement type exposes the following members.
Events
| Name | Description | |
|---|---|---|
.gif "Public event") |
PropertyChanged | Occurs when a DSL model element has changed. |
|
PropertyChanging | Occurs when a DSL model element is being changed. |
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Remarks
DSL model elements support property change events through their custom property descriptors.
These model elements are used, for example, by WPF data binding. However, they are not very convenient for programmatic use. Furthermore, if Visual Studio supports the "traditional" INotifyPropertyChanging or INotifyPropertyChanged interfaces, WPF prefers them over the property descriptor for two-way binding which fail because they do not use implicit transactions. Therefore, Visual Studio DSL model elements implement the traditional events without implementing the interfaces themselves.