EntityBag Part VI – RelationshipEntry

re: EntityBag Part VI – RelationshipEntry

ccBoy — Sun, 27 Jan 2008 19:33:06 GMT

I tried again yestoday :), I created a new WCF project and Service method is okay,but wcf client looks not good after using 'Add service References...' in VS2008.

The service side method:

-------------

public EntityBag<Patient> GetPatientAndCharges(int PatientNum)

{

using (PatientEntities svc = new PatientEntities())

{

ObjectQuery<Patient> patients = svc.Patient;

var objPatient = (from patient in patients

where patient.PatientNumber == PatientNum

select patient).First();

objPatient.PatientCharges.Load();

return svc.CreateEntityBag<Patient>(objPatient);

}

public int UpdatePatientAndChanges(EntityBag<Patient> bagPatient)

{

using (PatientEntities svc = new PatientEntities())

{

int ret = -1;

bagPatient.UnwrapInto(svc);

ret = svc.SaveChanges();

return ret;

}

---------

please find the detail error message as below:

--------------------------------------

Error 1 The type 'EntityBagTestClient.ClientSvc.EntityBagOfPatientqHGogXs4' cannot be used as type parameter 'T' in the generic type or method 'EntityBag.Lib.EntityBag<T>'. There is no implicit reference conversion from 'EntityBagTestClient.ClientSvc.EntityBagOfPatientqHGogXs4' to 'System.Data.Objects.DataClasses.IEntityWithKey'.

--------------------------------------

1.why does proxy generate a class as "EntityBagOfPatientqHGogXs4" ?

2. it seems EntityBag<T> can't be serialized ?

re: EntityBag Part VI – RelationshipEntry

dsimmons@microsoft.com — Mon, 28 Jan 2008 10:59:52 GMT

I suspect the issue you are having may be either a result of not referencing all of the relevant types on the client so proxy classes are being used instead of the actual types or a matter of not making the serializer aware of the model's types. You can take a look at the new version I put up on code gallery which has a full working service.

If that doesn't help you debug your system, then let me know, and we'll keep investigating.

- Danny

Creating an EntityBag class - article and code from Danny Simmons

Hot Topics — Tue, 29 Jan 2008 04:07:32 GMT

Danny Simmons wrote a class that persists the EntityState of objects in an ObjectContext so that they