C# IEnumerable Nasıl Kullanılır Günlükler

C# IEnumerable Nasıl Kullanılır Günlükler

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IEnumerable tüm verileri kırmızııp memory bile tutarak, sorgulama aksiyonlemlerini memory üzerinden yaparken IQueryable ise şartlara ilgilı query oluşturarak vasıtasız veritabanı üzerinden sorgulama ustalıklemi yapar.

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 data sources, use IQueryable

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:

Now List implements IEnumerable, but represents the entire collection in memory. If you have an IEnumerable and you call .ToList() you create a new list with the contents of the enumeration in memory.

The expression sevimli simply be a constant expression of the object itself or a more complex tree of a composed set of query operators and operands. The query provider's IQueryProvider.Execute() or IQueryProvider.CreateQuery() methods are called with an Expression

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Şimdi bu ifadelerin daha belirtik olması sinein C# IEnumerable Nerelerde Kullanılıyor bir örnek üzerinden gidelim ve bir önceki kırmızda custom Enumerator sınıfı ile yazdığımız C# IEnumerable Nedir Alisveris Sepeti iterator örneği yolırlayalım:

IEnumerable gives you the way to implement your own logic of storing and iterating over object collection

IEnumerable describes behavior, while List is an implementation of that behavior. When you use IEnumerable, you give the compiler a chance to defer work until later, possibly optimizing along the way. If you use ToList() you force the compiler to reify the results right away.

There are pros and cons to both. If you call ToList, you may remove some mystery birli to when the query gets executed. If you stick to IEnumerable, you get the C# IEnumerable Nasıl Kullanılır advantage that the yetişek doesn't do any work until it's actually required.

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 C# IEnumerable Nerelerde Kullanılıyor gold badges547547 silver badges911911 bronze badges 3 i also used this and was loooong happy.

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 C# IEnumerable Nedir to someone else's post