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EntityDataSource::ContextDisposing Event

.NET Framework (current version)
 

Occurs before an ObjectContext is disposed of.

Namespace:   System.Web.UI.WebControls
Assembly:  System.Web.Entity (in System.Web.Entity.dll)

C#
C++
F#
VB
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public:
event EventHandler<EntityDataSourceContextDisposingEventArgs^>^ ContextDisposing {
	void add(EventHandler<EntityDataSourceContextDisposingEventArgs^>^ value);
	void remove(EventHandler<EntityDataSourceContextDisposingEventArgs^>^ value);
}

Handle this event to prevent the ObjectContext used by the EntityDataSource control from being disposed of. Do this when you want to use a single ObjectContext instance in your page with several controls or instances of the EntityDataSource control. To prevent the ObjectContext from being disposed of, set the Cancel property of the EntityDataSourceContextDisposingEventArgs object to true. For more information, see Object Context Life-Cycle Management (EntityDataSource). For more information about the object context, see Identity Resolution, State Management, and Change Tracking.

To keep an existing ObjectContext instance member for future reference cancel the ContextCreated event as shown by the following code.

C#
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protected void EntityDataSource2_ContextDisposing(object sender, 
    EntityDataSourceContextDisposingEventArgs e)
{
    e.Cancel = true;
}

.NET Framework
Available since 3.5
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