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Generic Base Class for entities
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tersiusk View Drop Down
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Joined: 03-Nov-2010
Posts: 20 		Post Options Post Options   Quote tersiusk Quote  Post ReplyReply Direct Link To This Post Topic: Generic Base Class for entities
    Posted: 11-Nov-2010 at 12:58am
Hi sbelini

I'm getting the error on the SaveChanges()

Here is a sample solution. uploads/988/DevforceTemplate.rar


Edited by tersiusk - 11-Nov-2010 at 1:03am
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IdeaBlade
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Joined: 13-Aug-2010
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Posts: 786 		Post Options Post Options   Quote sbelini Quote  Post ReplyReply Direct Link To This Post Posted: 10-Nov-2010 at 4:23pm
Hi tersiusk,
 
Upon what operation are you getting the exception?
Are you using an injected base type? (you can do that in your model properties)
Can you upload a small sample (against northwindIB) reproducing the issue?
 
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tersiusk View Drop Down
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Posts: 20 		Post Options Post Options   Quote tersiusk Quote  Post ReplyReply Direct Link To This Post Posted: 08-Nov-2010 at 8:48am
I want a generic class to do some type safe methods etc. For instance I want all my entities to have a GetAll method which need to return ObservableCollection<T>. 
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Posts: 343 		Post Options Post Options   Quote smi-mark Quote  Post ReplyReply Direct Link To This Post Posted: 08-Nov-2010 at 8:26am
Why exactly do you need a Generic class?

When you have a base class EntityBase, User will inherit from EntityBase. You do not need to make it Generic
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Posts: 20 		Post Options Post Options   Quote tersiusk Quote  Post ReplyReply Direct Link To This Post Posted: 08-Nov-2010 at 7:20am
Hi

I have created a generic base class for my entities but I'm running into some issues with the serialization. I have defined the generic class as below. 
public abstract class EntityBase<T> : EntityBase
{      
}
I'm getting Error:
while getting known types for Type 'NetstarSecurity.DevForce.Model.EntityBase`1[T]'. The type must not be an open or partial generic class.
Now obviously my basetype is a open generic class...
I have tried adding the [KnownType(typeof(EntityBase<User>))] attribute but it still gives the same error. 

Please help. :)
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