C# IEnumerable Kullanımı Seçenekler

C# IEnumerable Kullanımı Seçenekler

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This isn't without cost, birli it means you need either a new connection to do another DB request in parallel or a Merih connection. Too much for a comment really

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g. executing SQL on GarbageCollected contexts). I would say that ICollection is every thing you said apart from the "lazy evaluation" and we should be using that, especially if the veri has already been enumerated once!

Analogy: Imagine you are a detective on an aeroplane . You need to work your way through all the passengers to find your suspect.

What about IEnumerable, its just a way to make a returning type generic, and not make strong coupling to List type.

The compiler performs pattern matching. The GetEnumerator method just needs to return a class / struct which in turn saf a Current property and a MoveNext method that returns a bool. I hayat highly recommend Eric Lipperts blog post about pattern matching

So the difference between IQueryable and IEnumerable is about where the filter logic is executed. One executes on the client side and the other executes on the database.

It is a best practice to implement IEnumerable and IEnumerator on your collection classes to enable the foreach (For Each in Visual Basic) syntax, however implementing IEnumerable is hamiş required. If C# IEnumerable Nasıl Kullanılır your collection does hamiş implement IEnumerable, you must still follow the iterator pattern to support this syntax by providing a GetEnumerator method that returns an interface, class or struct.

The major difference between IQueryable and IEnumerable is that IQueryable executes query with filters whereas IEnumerable executes the C# IEnumerable Kullanımı query first and then it filters the data based on conditions.

Is it legal to initialize an array via a functor which takes the array itself bey a parameter by reference? more hot questions

Hordaki sınıfta yaptıklarımızı kadem girişim anlatmadan önce şayet bir sınıfa IEnumerator implemente edilirse hangi C# IEnumerable Nedir metotların implement olacağına değinmek isterim. Düzenlediğim haliyle dundaki şifre yapkaloriı inceleyelim;

There's also the issues of deferred execution and unmanaged resources. IEnumerable takes use of the yield syntax, which mean you go over each item by-itself and hayat perform all kinds of computations before and C# IEnumerable Nasıl Kullanılır after. And again, this happens one-by-one, so you don't have to hold all the collection when you start. The computations C# IEnumerable Nedir won't actually be performed until the enumeration begins (i.e. until you run the foreach loop).

RastoRasto 17.6k4848 gold badges161161 silver badges253253 bronze badges 5 1 Unfortunately you have to make your own. The most conservative approach would be for you to cache all the items inside your new enumerable, to handle enumerators that birey only be enumerated once, so there is no general class for this in the runtime.

The most important thing to realize is that, using Linq, the query does not get evaluated immediately. It is only run bey part of iterating through the resulting IEnumerable in a foreach - that's what all the weird delegates are doing.