Beispiel #1
0
        IList IListSource.GetList()
        {
            EntityType rootEntityType = null;

            if (WrappedOwner.Entity != null)
            {
                EntitySet singleEntitySet = null;

                // if the collection is attached, we can use metadata information; otherwise, it is unavailable
                if (null != RelationshipSet)
                {
                    singleEntitySet = ((AssociationSet)RelationshipSet).AssociationSetEnds[ToEndMember.Name].EntitySet;
                    var associationEndType = (EntityType)((RefType)(ToEndMember).TypeUsage.EdmType).ElementType;
                    var entitySetType      = singleEntitySet.ElementType;

                    // the type is constrained to be either the entitySet.ElementType or the end member type, whichever is most derived
                    if (associationEndType.IsAssignableFrom(entitySetType))
                    {
                        // entity set exposes a subtype of the association
                        rootEntityType = entitySetType;
                    }
                    else
                    {
                        // use the end type otherwise
                        rootEntityType = associationEndType;
                    }
                }
            }

            return(ObjectViewFactory.CreateViewForEntityCollection(rootEntityType, this));
        }
        IList IListSource.GetList()
        {
            EntityType entityType = (EntityType)null;

            if (this.WrappedOwner.Entity != null)
            {
                if (this.RelationshipSet != null)
                {
                    EntitySet  entitySet    = ((AssociationSet)this.RelationshipSet).AssociationSetEnds[this.ToEndMember.Name].EntitySet;
                    EntityType elementType1 = (EntityType)((RefType)this.ToEndMember.TypeUsage.EdmType).ElementType;
                    EntityType elementType2 = entitySet.ElementType;
                    entityType = !elementType1.IsAssignableFrom((EdmType)elementType2) ? elementType1 : elementType2;
                }
            }
            return((IList)ObjectViewFactory.CreateViewForEntityCollection <TEntity>(entityType, this));
        }