Assembly: System.Web.Entity (in System.Web.Entity.dll)
Handle the event to supply your own ObjectContext instead of having a new ObjectContext created. If the event is not handled or the handler does not provide an ObjectContext, the EntityDataSource creates one according to its configuration. When an ObjectContext is provided to the event, the same instance is assigned to the Context property of the event object of successive events. 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 (Entity Framework).
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.