问题
I'd like to see if there's a way to hook into the Entity Framework context so I know as soon as it has finished creating a POCO object.
Are there any attributes I can use, such as with [OnDeserializing]? The purpose is to set a few values on the object as soon as the context is done creating it from a database fetch.
Thanks very much.
回答1:
Hook into the ObjectMaterialized event fired by ObjectContext. In CTP5, you need to cast your DbContext like so in the constructor for your DbContext:
((IObjectContextAdapter)this).ObjectContext.ObjectMaterialized +=
this.ObjectContext_OnObjectMaterialized;
If you are not using Code First, you don't need to cast. Then implement your function ObjectContext_OnObjectMaterialized(object sender, ObjectMaterializedEventArgs e). Via the EventArgs, you will be able to access your object, which has just been materialized.
来源：https://stackoverflow.com/questions/4765101/handle-entity-framework-on-create-poco