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Extension points for ADO.NET Entity Framework

, 31 Dec 2009 CPOL
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I explored a bit more on Entity framework,during last week of 2009 and here goes my observations on how to extend the Entity Framework functionality if you want to customize the normal/ideal flow of Entity framework execution engine.1) OnContextCreatedBy default a declaration of this...
I explored a bit more on Entity framework,during last week of 2009 and here goes my observations on how to extend the Entity Framework functionality if you want to customize the normal/ideal flow of Entity framework execution engine.
 
1) OnContextCreated
 
By default a declaration of this method will be there as a partial method in the generated code, and as the name suggest this will be invoked during the first time when the ObjectContext class gets created,Hence this is the right place if you want to execute some operation after the ObjectContext creation
 
2) OnChanging(value)
 
Again this is the partial method which will be executed when the value of the property of an EntityObject is getting materialized,Hence if you wanna to add some logic/validation when the object property is getting assigned this is the right place of choice for you
 
3) OnChanged
 
This is the other partial method which will be executed after the property value of an EntityObject is assigned,Hence after the assignement if you want to perform any operation here you can write..
 
Note : Both the OnChanging and and OnChanged will be executed every time when the EntityObject is getting materialized, So if you wanna to write performance intent code be aware of the side effects !
 
Happy programming and a very Happy new year
 
Regards,
-Vinayak

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About the Author

Vinayaka Krishna Shenoy
Architect MindTree Ltd
India India
Motivated achiever who guides organizations in applying technology to business settings, provides added value, and creates project deliverables in a timely manner. An experienced Technical Consultant, have successfully led large project teams of more than 20 people from requirements gathering to implementation and support using C#, .NET ,ADO.NET, ADO.NET Entity Framework,ASP.NET,ASP.NET MVC, WCF and SQL Server.

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