Definitive Guide C# IEnumerable Nasıl Kullanılır için

Definitive Guide C# IEnumerable Nasıl Kullanılır için

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Implementation of IEnumerable is generally the preferred way for a class to indicate that it should be usable with a "foreach" loop, and that multiple "foreach" loops on the same object should operate independently.

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 data sources, use IQueryable

Kakım per other answers, the evaluation of the result was deferred until calling ToList or similar invocation methods for example ToArray.

Analogy: Imagine you are a detective on an aeroplane . You need to work your way through all the passengers to find your suspect.

Said in a very simple way, that any object implementing this interface will provide a way to get an enumerator. An enumerator is used with the foreach as one example.

but if you "spoof" the enumerator into an enumerable, the second sequence will be empty. Or if you do them in parallel - just bizarre. And there are

This is a birçok video on youtube which demonstrates how these interfaces differ , worth a watch. Below goes a long descriptive answer for it.

You don't have to open a book and learn how to traverse the tree - but simply use the foreach statement on that object and you're done.)

Else use an IEnumerable. The default should be to use the on-demand evaluation C# IEnumerable Temel Özellikleri in the second example, bey that generally uses less memory, unless there is a specific reason to store the results in a list.

Are there substantive differences between the different approaches to "size issues" in category theory?

Then with a C# IEnumerable Nedir IQueryable the generated SQL will contains “where name = “a”, but with a IEnumerable many more roles will be pulled back from the database, then the x.name = “a” check will be done by .Kupkuru.

Important Some information C# IEnumerable Nasıl Kullanılır relates C# IEnumerable Nedir to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided C# IEnumerable Nedir here.

Reed CopseyReed Copsey 561k7979 gold badges1.2k1.2k silver badges1.4k1.4k bronze badges 3 2 I agree strongly with your point about decoupling from the implementation, but I also think there's a point for making clear the expected usage; even if I have a List, referring to it bey IEnumerable makes it clear that the functionality I'm expecting from the collection in that usage is the enumerability functionality, and derece any of the other List functionality.

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