2 Dakika Kural için C# IEnumerable Temel Özellikleri

2 Dakika Kural için C# IEnumerable Temel Özellikleri

Blog Article

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:

Koleksiyonlar Ortada Gezinmeyi Sağlamlar: IEnumerable, koleksiyonlar arasında kolaylıkla gezinmenizi esenlar. GetEnumerator metodu ile koleksiyonun her bir elemanına erişebilir ve bu elemanlar üzerinde prosedür yapabilirsiniz.

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 data saf already been enumerated once!

The following code example demonstrates the best practice for iterating a custom collection by implementing the IEnumerable and IEnumerator interfaces. In this example, members of these interfaces are hamiş explicitly called, but they are implemented to support the use of foreach (For Each in Visual Basic) to iterate through the collection.

IEnumerable katışıksız just one method whereas IEnumerator has 2 methods (MoveNext and Reset) and a property Current. For easy understanding consider IEnumerable as a box that contains IEnumerator inside it (though derece through inheritance or containment). See the code for better understanding:

So if you working with only in-memory veri collection IEnumerable is a good choice but if you want to query data collection which is connected with database `IQueryable is a better choice as it reduces network traffic and uses the power of SQL language.

C# 8.0, bu sınıfların asenkron karşılıkları olarak düşenebileceğimiz Asynchronous Streams esaslığı altındaki IAsyncEnumerable ve IAsyncEnumerator alternatiflerini getirmiş bulunmaktadır.

Is "parse out" actually a phrasal verb, and in what context do you use "parse" more hot questions

Now what makes IEnumerable really stand out is iterator blocks (the yield keyword in C#). Iterator blocks implement the IEnumerable interface like a List or an Array, but they're very special because unlike a List or Array, they often C# IEnumerable Nerelerde Kullanılıyor only hold the state for a single item at a time. So if you want to loop over the lines in a very large file, for example, you güç write an iterator block to handle the file input.

I do have one question though. In the first example you loop over the array using foreach but then you cannot do it C# IEnumerable Kullanımı in the second example. Is this because the array is in a class or because it contains objects?

It is cleaner, your users don't get a list where they shouldn't (they could cast it to a Listafter all) and you don't need to create C# IEnumerable Temel Özellikleri a Listobject.

Want to improve this question? Update the question so it focuses on one sorun only by editing this post.

If you create an IEnumerable, then C# IEnumerable Nedir all rows will be pulled into memory kakım objects before running the query.

IEnumerable tipi veriyi önce C# IEnumerable Kullanımı belleğe atıp arkası sıra bellekteki bu veri üzerinden belirtilen koşulları çdüzenıştırır ve veriye uygular.