Temel İlkeleri C# IEnumerable Nedir

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The difference between IQueryable and IEnumerable is centered around this point. IQueryable builds expression trees whereas IEnumerable does not, at least derece in general terms for those of us who don't work in the secret labs of Microsoft.

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The second example returns an IEnumerable that contains all the information needed to run the query later on.

IEqualityComparer kullanarak, özel gereksinimlere elverişli veri işleme stratejileri geliştirebilir ve aplikasyon genelinde tutarlılık sağlamlayabilirsiniz.

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Quoting that article, 'Bey per the MSDN documentation, calls made on IQueryable operate by building up the internal expression tree instead.

IEnumerator interface inden gelen “Current” propertysinin get metodunda kendi tanılamamladığımız “Current” property’sini return ettik.

So, the first example evaluates the query immediately by calling ToList and putting the query results in a list.

Now what makes IEnumerable really stand out is iterator blocks (the yield keyword in C#). Iterator blocks implement the IEnumerable interface like a C# IEnumerable Nerelerde Kullanılıyor List or an Array, but they're very special because unlike a List or Array, they often only hold the state for a single item at a time. So if you want to loop over the lines in a C# IEnumerable Nasıl Kullanılır very large file, for example, you gönül write an iterator block to handle the file input.

for instance, suppose you decided to read a large file line by line C# IEnumerable Nedir and doing something on that, therefore you birey write your own ReaderEnumrable to read your file

" This is false, because the where clause is getting called on an IEnumerable and that only knows how to loop through objects which are C# IEnumerable Kullanımı already coming from the database. If you made the return of AllSpotted() and the parameters of Feline() and Canine() into IQueryable, then the filter would happen in SQL and this answer would make sense.

Yukarıdaki hatada Calisan dershaneının bir GetEnumerator bâtınermediğini belirtiyor. Kısaca buradan da şu çıyaşlımı yapabiliriz;

IQueryable is a very powerful feature that enables a variety of interesting deferred execution scenarios (like paging and composition based queries).

IEnumerable interface’i ile bir sınıf itere edilebilir hale getiriliyor, bu prosedür zarfında GetEnumerator metodu sınıfa implement ediliyordu. IEnumerator interface’i ise iterasyon özelliği kazanmıştırracak ve C# IEnumerable Nedir iterasyon meslekleminde kullanılacak elemanları ve özellikleri barındırmaktadır.