Greatest Kılavuzu C# IEnumerable Temel Özellikleri için

Greatest Kılavuzu C# IEnumerable Temel Özellikleri için

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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:

Anything in .Safi that you emanet iterate over implements IEnumerable. If you're building your own class, and it doesn't already inherit from a class that implements IEnumerable, you hayat make your class usable in foreach statements by implementing IEnumerable (and by creating an enumerator class that its new GetEnumerator method will return).

Projeyi yayınladıgınız devran user secrets kullanılmıyor. Bu yalnızca geliştirme aşamasında kullanılabilir.

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 güç be manipulated form the caller Add/Remove/Update elements. without

Basıcı ki bu kabiliyet “List,ArrayList” kabil collectionlarda daha müterakki seviye bir mimariyle esenlanır lakin biz mahdut bir mimariyle kendi iterasyon yeteneğine ehil classlarımızı yazabiliriz.Haydi temellayalım.

Örnekte, kullanıcıların eşit olup olmadığını denetleme ederken kullanıcı adları dikkate münfailtır.

// but this throws an exception, because the pointer or link to the // database namely C# IEnumerable Temel Özellikleri the DbContext called MyEntities no longer exists.

IEnumerable and IEnumerator are both interfaces. IEnumerable saf just one method called GetEnumerator. This method returns (kakım all methods return something including void) another type which is an interface and that interface is IEnumerator. When you implement enumerator logic in any of your collection class, you implement IEnumerable (either generic or non generic).

Now what makes IEnumerable really stand out is iterator blocks (the yield C# IEnumerable Kullanımı 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 C# IEnumerable Nedir often only hold the state for a single item at a time. So if you want to loop C# IEnumerable Nasıl Kullanılır over the lines in a very large file, for example, you yaşama write an iterator block to C# IEnumerable Nasıl Kullanılır handle the file input.

This works for read-only access to a collection that implements that IEnumerable sevimli be used with a foreach statement.

This dirilik be very useful in certain circumstances, for instance in a massive database table you don't want to copy the entire thing into memory before you start processing the rows.

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If the collection supports indexers, you could also iterate over it with the classic for loop method but the Iterator pattern provides some birçok extras like the ability to add synchronization for threading.

Below mentioned small sınav might help you understand one aspect of difference between IQueryable and IEnumerable. I've reproduced this answer from this post where I was trying to add corrections to someone else's post