Wiki Link: [discussion:455]
Cannot build Perseus 

Jun 12 2008 at 4:34 PM
Edited Jun 12 2008 at 6:46 PM
Hi everyone.
I've downloaded both 1.0 and 1.1 versions and I can't buid any of them.
Studio cannot find extension method GetEntityKey in this row:

EntityKey targetKey = context.GetEntityKey(fullEntitySetName, target);

there exists method with such name but it has different parameters list & interface it applies to.
Well, actually I've found method with such a signature named CreateEntityKey(string, object). Was this method meant in that line?

Did anyone succeeded in using Perseus?

Jun 13 2008 at 11:55 AM
Edited Jun 13 2008 at 12:10 PM
Great. It works. At least I succeeded in launching it and getting bag from service :)

Oct 10 2008 at 12:59 PM
For me, replacing GetEntityKey(fullEntitySetName, target);
by CreateEntityKey(fullEntitySetName, target);
did not seems to work because when I try to persist modifications I got an InvalidOperationException exception
The supplied EntityKey does not have a corresponding entry in the ObjectStateManager.
in the line just after :
EntityKey targetKey = context.CreateEntityKey(fullEntitySetName, target);
ObjectStateEntry targetStateEntry = context.ObjectStateManager.GetObjectStateEntry(targetKey); <---- Exception

Any idea ?
Thanks for your help.

Oct 10 2008 at 4:21 PM
Solution FOUND !

Replace : context.GetEntityKey(fullEntitySetName, target)


EntityKey targetKey;
EntityObject e = target as EntityObject;
if (e != null && e.EntityKey != null)
targetKey = e.EntityKey;
targetKey = context.CreateEntityKey(fullEntitySetName, target);

Now it works on VS2008 SP1

Oct 31 2008 at 2:32 AM
Thanks very much! That works for me, too.

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