WebApr 10, 2024 · One of the slower parts of a database query is the transfer of the data to your machine. So it is good practice to transfer only the data you plan to use. When you use LINQ in entity framework, using Queryable.Select is a good way to specify exactly what data you want to transfer. This is usually done just before your final ToList ... WebNov 8, 2013 · There are two ways to perform Eager Loading in Entity Framework: ObjectQuery.Include Method Explicit loading using either DbEntityEntry.Collection Method or DbEntityEntry.Reference Method along with their respective Load methods There are also manners to write Raw SQL Queries against database: DbSet.SqlQuery Method deals …
c# - Spanner - Entity Framework …
WebIf you are using Entity Framework 4.1 or later, you can use: var discussion = _repository.GetDiscussionCategory (id); // Count how many messages the discussion has var messageCount = context.Entry (discussion) .Collection (d => d.Messages) .Query () .Count (); Source: http://msdn.microsoft.com/en-US/data/jj574232 Share Improve this … WebJul 8, 2016 · You cannot nest calls that way. Include works on the core entity you are working with - that entity defines shape of the query so after you call Include(x => Wheels) you are still working with IQueryable and you cannot call extension method for IQueryable. You must again start with Car: double glazing jobs in sussex
c# - Entity Framework Core get entity without related …
WebApr 15, 2015 · EF is set up to allow Eager loading by using the .Include () function on your query, with lazy loading it can get messy if you start turning it on/off for various functions, you're better to just turn it off and manage what/when you want data loaded if you're feeling a need to turn it off. WebNov 29, 2011 · You can use Linq to Entities. You can match every object in entity1 and check if there is a corresponding data/object entity in entity2. using (NorthwindEntities … WebMar 16, 2024 · public IActionResult getAllProperties () { var properties = db.properties .Include (cat => cat.category) .ThenInclude (sub => sub.subCategory) .ThenInclude (sec => sec.SecondSubCategory) .Include (e => e.heating) .Include (e => e.type) .OrderByDescending (x => x.id) .ToList (); return Ok (properties); } Share Improve this … double glazing jobs scotland