empty navigation property collections
Posted: Tue 11 Oct 2011 08:40
Hi,
a pure Entity Framework question :
I am using Entity Framework with self tracking entities, in a WCF client - server environment.
When i am loading an entity is do not load all sub entities, the subentities are only loaded on demand ( when opening the tab).
Now i want to sometimes access a property from another tab,
and want to know if the subentities were loaded or not.
If there is data, then it is simple : it was loaded.
If there is no data, then its either not loaded, or it was loaded but returned empty.
The only way i see to make the difference in the second scenario, is to make a boolean field for each collection 'isxxxLoaded'. And i was wondering if there is a better way ? ( even maybe if the TrackableCollections can be smart enough to keep track of that , because i would hope that EF does the same for its lazy loading mechs)
a pure Entity Framework question :
I am using Entity Framework with self tracking entities, in a WCF client - server environment.
When i am loading an entity is do not load all sub entities, the subentities are only loaded on demand ( when opening the tab).
Now i want to sometimes access a property from another tab,
and want to know if the subentities were loaded or not.
If there is data, then it is simple : it was loaded.
If there is no data, then its either not loaded, or it was loaded but returned empty.
The only way i see to make the difference in the second scenario, is to make a boolean field for each collection 'isxxxLoaded'. And i was wondering if there is a better way ? ( even maybe if the TrackableCollections can be smart enough to keep track of that , because i would hope that EF does the same for its lazy loading mechs)