how use using statement with domain Context

[Nelson]

Hi there,

I've in my silverlight application a lot of memory leaks due telerik object. One thing that I can try is using my domainContext with using statement clause, like this:

           using (SGADomainContext contexto = new SGADomainContext())
            {
                LoadOperation<Entidades> loadOp = contexto.Load(contexto.GetEntidadesPorLoginQuery(loginUtilizador, passEncriptada,     false), LoadBehavior.RefreshCurrent, LoginLoadedCallback, true);    
            }

However I can´t use, VS give me this error: type used in a using statement must be implicitly convertible to 'System.IDisposable'.

Any idea how solve this?

Thanks in advance,

Nelson Silva

[Jan Blessenohl]

Hello Nelson,
I guess your SGADomainContext does not derive from OpenAccessContext but wraps it. To clean up the OpenAccessContext you should implement IDisposable on your SGADomainContext  class and Dispose the wrapped OpenAccessContext.

All the best,
Jan Blessenohl
the Telerik team

[Manuel]

Hi Jan,

When I said SGADomainContext I refer to the domainContext class, that derive from OpenAccessDomainService

public partial class SGADomainContext : OpenAccessDomainService<ModeloSGA>
{
}

Is this contexto that I use to load data from database. But I read in some examples, that is possible do something like

using (SGADOMAINCONTEXT contexto = new SGADOMAINCONTEXT() )
{
        LoadOperation<ParticipantesReuniao> loadOp = contextoSGA.Load(contextoSGA.GetParticipantesReuniaosQuePodemVotarQuery(AppGlobais.Globais.reuniaoGlobal.IdProp))
}

Is this correct? How I should proceed?

Thanks

[PetarP]

Hello Manuel,

Since the loading of data is not a synchronous operation disposing the context like that might lead to some problems. I would suggest that you subscribe to the completed even of the load operation and dispose the context there only after the read operation has finished.

Regards,
Petar
the Telerik team