5 Temel Unsurları için C# IEnumerable Kullanımı
5 Temel Unsurları için C# IEnumerable Kullanımı
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The difference between IQueryable and IEnumerable is centered around this point. IQueryable builds expression trees whereas IEnumerable does derece, at least not in general terms for those of us who don't work in the secret labs of Microsoft.
If you düşünce to build a public API, it's better to use IEnumerable than List, because you better use the most minimalistic interface/class. List lets you access objects by index if that's required.
IEnumerable interface’i sebebiyle bir klas itere edilebilir özellik kazanmaktadır. Evet bir sınıfın itere edilebilirlik özellik kazanması neydi?
But now see the below code we have changed IEnumerable to IQueryable. It creates a SQL Query at the server side and only necessary data is sent to the client side.
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 evaluate the sequence (in this case, when ToList is called) those filters will all be applied.
IEnumerable ve IEnumerator interfaceler’i ile sizlerde oluşturduğunuz sınıflara itere özellikleri kazandırabilir, hatta IEnumerator interface’i ile oluşturduğunuz enumerator’bile isteğinize bakarak iterasyonun periyodunu ayarlayabilir ve foreach döngüsünde kullanabilirsiniz.
The primary difference is that the LINQ operators for IQueryable C# IStructuralComparable Temel Özellikleri take Expression objects instead of delegates, meaning the custom query logic it receives, e.g., a predicate or value selector, is in the form of an expression tree instead of a delegate to a method.
IEnumerable gives you the way to implement your own logic of storing and iterating over object collection
Nobody mentioned C# IStructuralComparable Nasıl kullanılır one crucial difference, ironically answered on a question closed kakım a duplicated of this. IEnumerable is read-only and List is hamiş.
I do have one question though. In the first C# IStructuralComparable Temel Özellikleri example you loop over the array using foreach but then you cannot do it in C# IStructuralComparable nerelerde kullanılıyor the second example. Is this because the array is in a class or because it contains objects?
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IEnumerable enable C# IStructuralComparable Kullanımı implicit reference conversion for array types which known birli Covariance. Consider the following example:
user541686user541686 208k132132 gold badges547547 silver badges911911 bronze badges 3 i also used this and was loooong happy.
The most important thing to realize is that, using Linq, the query does derece get evaluated immediately. It is only run bey part of iterating through the resulting IEnumerable in a foreach - that's what all the weird delegates are doing.