Detaylar, Kurgu ve C# IEnumerable Nerelerde Kullanılıyor

Detaylar, Kurgu ve C# IEnumerable Nerelerde Kullanılıyor

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If your class is a custom collection class then yes, it should implement IEnumerable. In this case a public property for the inner list would be redundant. Imagine a simple class:

So when you have to simply iterate through the in-memory collection, use IEnumerable, if you need to do any manipulation with the collection like Dataset and other veri sources, use IQueryable

Different implementations of collections güç be enumerable; using IEnumerable makes it clear that what you're interested in is the enumerability, and not the structure of the underlying implementation of the collection.

Consider that in your code example a new list created. I don't know what is m_states, but if this is a value types collection, you create a clone of the original list. In this way the returning list can be manipulated form the caller Add/Remove/Update elements. without

What about IEnumerable, its just a way to make a returning type generic, and hamiş make strong coupling to List type.

The syntax (which you rarely see because there are prettier ways to do it) for moving through a collection that implements IEnumerable is:

Derece: Generic olmayan sınıflar karınin IEnumerable kullanmaında boxing/unboxing maslahatlemleri verimliliği düşüreceği derunin yeni oluşturacağınız projelerinizde generic sınıflar için olan IEnumerable

C# IEnumerator kullanarak MySQL veritabanından veri çtakım bu verileri DataGridView kontrolörüne nasıl ekleyebileceğimizi gösteren örnek kod süflida iz almaktadır.

Yield ile kendimiz named iteretor'ler oluşturabiliriz. Örneğin izlenceımızın 750TL den daha pahalı ürünleri getirmesini istiyoruz:

for instance, suppose C# IEnumerable Temel Özellikleri you decided to read a large file line by line and doing something on that, therefore you kişi write your own ReaderEnumrable to read your file

" This is false, because the where clause is getting called on an IEnumerable and that only knows how to loop through objects which are already coming C# IEnumerable Temel Özellikleri from the database. If you made the return of AllSpotted() and the parameters of Feline() and Canine() into IQueryable, then the filter would happen in SQL and this answer would make sense.

But if your class cannot act like a collection then provide a public IEnumerable property C# IEnumerable Nerelerde Kullanılıyor for its elements:

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

IEnumerable tipi veriyi önce belleğe atıp ardından bellekteki bu muta üzerinden belirtilen koşulları çallıkıştırır ve veriye uygular.