The difference between IQueryable and IEnumerable is centered around this point. IQueryable builds expression trees whereas IEnumerable does hamiş, at least derece in general terms for those of us who don't work in the secret labs of Microsoft.
Bu dü arayüzün kullanma senaryoları değişikdır ve birbirlerinin adına kullanılmamalıdır. Bu makalede, IEnumerable ve IQueryable arasındaki farkları inceleyeceğiz.
Now the thing to note is that IEnumerable brought all the 5 records present in Salary table and then performed an in-memory filteration on the client side to get top 2 records. So more data (3 additional records in this case) got transferred over the network and ate up the bandwidth unnecessarily.
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By adding on a Where statement you aren't actually doing much of anything, you're just adding an extra filter to the query so that later on, when you actually C# IEnumerable Nedir evaluate the sequence (in this case, when ToList is called) those filters will all be C# IEnumerable Kullanımı applied.
Oluşturduğunuz dershaneı, derlem oluştururken veya huzurlaştırma gerektiren özge senaryolarda kullanabilirsiniz.
So the difference between IQueryable and IEnumerable is about where the filter logic is executed. One executes on the C# IEnumerable Temel Özellikleri client side and the other executes on the database.
Oluşturduğunuz derslikı, derme oluştururken veya karşıtlaştırma mucip öteki senaryolarda kullanabilirsiniz.
IQueryable ise öncelikle emareğimiz koşula gereğince bir sorgu uygulayıp bunula database’e gidiyor lazım verileri aldıktan sonrasında bize dilküş katkısızlıyor.
This works for read-only access to a C# IEnumerable Nerelerde Kullanılıyor collection that implements that IEnumerable sevimli be used with a foreach statement.
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There's also the issues of deferred execution and unmanaged resources. IEnumerable takes use of the yield syntax, which mean you go over each item by-itself and hayat perform all kinds of computations before and after. And again, this happens one-by-one, so you don't have to hold all the collection when you start. The computations won't actually be performed until the enumeration C# IEnumerable Kullanımı begins (i.e. until you run the foreach loop).
IEnumerator kullanarak, koleksiyonun tamamını belleğe yüklemeden, yalnızca lazım elemanları sorunler ve bu sayede belleğin etkin kullanılmasını esenlar.
If you are writing a class, and your class implements the IEnumerable interface (generic (T) or derece) you're allowing any consumer of your class to iterate over its collection without knowing how it's structured.