En iyi Tarafı C# IEnumerable Nerelerde Kullanılıyor

En iyi Tarafı C# IEnumerable Nerelerde Kullanılıyor

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, and the database only returns the rows that are relevant. But if we had returned a List from AllSpotted(), then it may run slower because the database could return far more veri than is actually needed, and we waste cycles doing the filtering in the client.

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

This where filter is executed on the client side where the IEnumerable code is. In other words all the veri is fetched from the database and then at the client its scans and gets the record with EmpId is 2.

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.

Tabi ki bu kudret “List,ArrayList” üzere collectionlarda daha sonra seviye bir mimariyle esenlanır lakin biz niteliksiz bir mimariyle kendi iterasyon yeteneğine iye classlarımızı yazabiliriz.Haydi mebdelayalım.

static public IEnumerable VerileriGetir() yield return "Pazartesi"; yield return "Salı"; yield return "Çarşamba"; yield return "Perşembe"; yield return "Cuma"; yield return "Cumartesi"; yield return "Pazar"; Şimdi zirdaki şifre bloğunu ayrıntılıca inceleyelim.

C# IEnumerable kullanmanın birkötü üstünlükı vardır ve bu avantajlar sayesinde yazılım vüruttiricilerin C# IEnumerable Nerelerde Kullanılıyor sık sık tercih ettiği bir arayüz olmuştur. İşte detaylı olarak illet C# IEnumerable kullanmalıyız:

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So you have a common IEnumerator-implementing class for all ten, and each collection just has to implement IEnumerable using that enumerating class. It's about separation of concerns, treating holding data and enumerating data birli separate operations.

Marc GravellMarc Gravell 1.0m271271 gold badges2.6k2.6k silver badges2.9k2.9k C# IEnumerable Nasıl Kullanılır bronze badges 1 1 The mistake with "Reset" was with just having one type of enumerable. IMHO, there should have been an IMultipassEnumerable, inheriting IEnumerable, which would support Reset and guarantee that multiple passes will either return identical veri or throw an C# IEnumerable Nasıl Kullanılır exception; an ordinary IEnumerable whose collection was modified should be allowed to return 'sensible' data if it's able to do so or throw an exception if it birey't, and an ISafeEnumerable, which C# IEnumerable Temel Özellikleri would be expected to work sensibly (without throwing an exception) even if a collection changes. A bit late now to change things, though.

IEnumerable ve IQueryable aradındaki ayırtı anlatmadan önce kısaca bu dü C# IEnumerable Nedir interface klasını tanılamayalım.

a reset on enumerators, but this is largely a design mistake and shouldn't be used (it is even a formal requirement in the spec that iterator blocks throw an exception if you call it).

Then you'll never have more than one line of the file in memory at a time, and if you finish the loop earlier (perhaps it was a search and you found what you needed) you might derece need to read the whole file. Or if you're reading the results from a large SQL query you can sınır your memory use to a single record.

Bu metodun amacı garbage collector’ı beklemeden kullanılan referans tipi bileğanlayışkenleri işlemleri bittikten sonrasında ramden temizleyebilmektir.IEnumerable,IEnumerator interface’leri C# 2 ile baş başa gelmiş ve IEnumerable,IEnumerator interface’lerinden kalıt münfailtır.Peydaçkakımı temelde aynı çalışmai yapmakla omuz omuza bu yazdıklarımı dikkate almış olduğunızda,generic mimariları kullanmanız elan sağlıklı görünmektedir.