C# IEnumerable Nasıl Kullanılır Seçenekler

C# IEnumerable Nasıl Kullanılır Seçenekler

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Implementation of IEnumerable is generally the preferred way for a class to indicate that it should be usable with a "foreach" loop, and that multiple "foreach" loops on the same object should operate independently.

Lakin şuana denli yapmış evetğumuz tüm çalışmalemler döngü değmeslekkeninin object olarak gelmesini sağlamlamaktadır. O yüzden aracısız olarak cast maslahatlemi uygulatıyor, “var” adına “Personel” tipini kullanıversiyon.

I changed the names of my original objects so that this looks like a more generic example. The query itself is not that important. What I want to ask is this:

There are many differences but let us discuss about the one big difference which makes the biggest difference. IEnumerable interface is useful when your collection is loaded using LINQ or Entity framework and you want to apply filter on the collection.

System.Collections.IEnumerator. This interface provides the infrastructure to allow the caller to traverse the internal objects contained by the IEnumerable-compatible container:

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

For small result sets this is likely to be a single trip, for large ones you're sending a request for more rows from the results, but it doesn't re-run the entire query.

Your linq expression returns an enumeration, and by default the expression executes when C# IEnumerable Nasıl Kullanılır you iterate through using the foreach. An IEnumerable linq statement executes when you iterate the foreach, but you gönül force it to iterate sooner using .ToList().

There are many cases (such kakım an infinite list or a very large list) C# IEnumerable Temel Özellikleri where IEnumerable cannot be transformed to a C# IEnumerable Kullanımı List. The most obvious examples are all the prime numbers, all the users of feysbuk with their details, or all the items on ebay. The difference is that "List" objects are stored "right here and right now", whereas "IEnumerable" objects C# IEnumerable Nerelerde Kullanılıyor work "just one at a time".

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 a Listobject.

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user541686user541686 208k132132 gold badges547547 silver badges911911 bronze badges 3 i also used this and was loooong happy.

You should still avoid declaring the parameter type birli List. Using IList allows the caller to pass arrays and any other objects whose type implements IList.