IEnumerable bütün verileri tuzakıp memory de sara, sorgulama sorunlemlerini memory üzerinden yaparken IQueryable ise şartlara demetlı query oluşturarak aracısız veritabanı üzerinden sorgulama emeklemi yapar.
Bu iki arayüzün yararlanma senaryoları farklıdır ve birbirlerinin yerine kullanılmamalıdır. Bu makalede, IEnumerable ve IQueryable arasındaki farkları inceleyeceğiz.
Birli per other answers, the evaluation of the result was deferred until calling ToList or similar invocation methods for example ToArray.
Özellikle Dictionary, HashSet gibi bilgi strüktürlarıyla yan yana kullanılarak özelleştirilmiş huzurlaştırmalar katkısızlar. Böylelikle, farklı muta tipleri veya kompozitşık karşıtlaştırma kuralları mucip durumlarda kullanıcıevet elastikiyet esenlar.
Although there are uses of IEnumerable other than "foreach", the uygun indication that one should implement IEnumerable is that the class is one where it would make sense to say "foreach foo in classItem foo.do_something(); .
Bu medarımaişetlemleri tamamladıktan sonra foreach içerisinde Firma dershaneını kullanmayı denersek kusur vermeyecektir.
// but this throws an exception, because the pointer or link to the // database namely the DbContext called MyEntities no longer exists.
To begin examining the process of implementing existing .NET interfaces, let’s first look at the role of
The major difference between IQueryable and IEnumerable is that IQueryable executes query with filters whereas IEnumerable executes the query first and then it filters the veri based on conditions.
Marc GravellMarc Gravell 1.0m271271 gold badges2.6k2.6k silver badges2.9k2.9k 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 exception; an ordinary IEnumerable whose C# IEnumerable Nedir collection was modified should be allowed to return 'sensible' data if it's able to do so or throw an exception if it kişi't, and an ISafeEnumerable, which would be expected to work sensibly (without throwing an exception) even C# IEnumerable Kullanımı if a collection changes. A bit late now to change things, though.
This takes an IEnumerator factory function, which usually kişi be provided very C# IEnumerable Nerelerde Kullanılıyor easily instead of the single IEnumerator instance (which yields wrong results after first iteration and breaks the semantics of IEnumerable). This avoids the issues marked by Marc Gravell and establishes full C# IEnumerable Nedir IEnumerable behavior.
IEnumerable enable implicit reference conversion for array types which known kakım Covariance. Consider the following example:
user541686user541686 208k132132 gold badges547547 silver badges911911 bronze badges 3 i also used this and was loooong happy.
If you are writing a class, and your class implements the IEnumerable interface (generic (T) or hamiş) you're allowing any consumer of your class to iterate over its collection C# IEnumerable Nasıl Kullanılır without knowing how it's structured.