Persistence of byte array using WCF RIA

[Ian]

Hi

I'm trying to persist a byte array (layout data from Silverlight RadDocking) using OpenAccess and WCF RIA generated using the Domain Service Wizard.  I get the warning as explained here (http://www.telerik.com/help/openaccess-orm/openaccess-tasks-howto-explicit-change-tracking.html) but have no idea of how to handle this in the context of RIA. 

Any guidance gratefully appreciated.

Thanks

Ian

[PetarP]

Hi Ian,

 You can expose the IObjectScope from your context class. So for example imagine that this is your context class:

public partial class NorthwindEntityDiagrams : OpenAccessContext
    {
        private static string connectionStringName = "NorthwindEntityDiagrams";

        private static BackendConfiguration backend = GetBackendConfiguration();


        private static MetadataSource metadataSource = XmlMetadataSource.FromAssemblyResource("EntityDiagrams.rlinq");

        public NorthwindEntityDiagrams()
            :base(connectionStringName, backend, metadataSource)
        { }

        public NorthwindEntityDiagrams(string connection)
            :base(connection, backend, metadataSource)
        { }

        public NorthwindEntityDiagrams(BackendConfiguration backendConfiguration)
            :base(connectionStringName, backendConfiguration, metadataSource)
        { }

        public NorthwindEntityDiagrams(string connection, MetadataSource metadataSource)
            :base(connection, backend, metadataSource)
        { }

        public NorthwindEntityDiagrams(string connection, BackendConfiguration backendConfiguration, MetadataSource metadataSource)
            :base(connection, backendConfiguration, metadataSource)
        { }

        public IQueryable<Category> Categories
        {
            get
            {
                return this.GetAll<Category>();
            }
        }

        public static BackendConfiguration GetBackendConfiguration()
        {
            BackendConfiguration backend = new BackendConfiguration();
            backend.Backend = "mssql";
            return backend;
        }

        public IObjectScope GetObjectScope
        {
            get
            {
                return this.GetScope();
            }
        }
    }

The highlighted code is the one I have added. Having the scope exposed you can add the following method to your RIA data service:

public void MarkPictureAsChanged(Category category)
       {
           this.DataContext.GetObjectScope.MakeDirty(category, "Picture");
       }

I hope this helps.

Kind regards,
Petar
the Telerik team