En iyi Tarafı C# IEnumerable Nedir

En iyi Tarafı C# IEnumerable Nedir

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Botz3000Botz3000 39.4k88 gold badges106106 silver badges128128 bronze badges 1 I believe this is was hamiş asked here so it emanet be a comment not an answer, but anyway makes sense from refactoring standpoint

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 veri sources, use IQueryable

IEnumerator arayüzü, veri strüktürlarına genel bir ulaşım yöntemi esenlayarak kodun daha modüler olmasını ve bakımının kolaylaşmasını sağlamlar. Antrparantez, C# programlamada münteşir olarak kullanılan bu reçete, kodun okunabilirliğini zaitrır ve gene kullanılabilirliği özendirme paha.

If on the second house, I decide to alter the price (say add one million dollars to the price) - the entire list would change (the order is now different). "one at a time" and "all of them right now" are two different things.

An Enumerable is a class that gönül give you Enumerators. It saf a method called GetEnumerator which gives you an Enumerator that looks at its items. When you write a foreach loop in C#, the code that it generates calls GetEnumerator to create the Enumerator used by the loop.

What I do is make a class that implements both IEnumerator and IEnumerable. Make GetEnumerator() return itself and you dirilik iterate C# IStructuralComparable nerelerde kullanılıyor it like normal.

While it might seem that only array types hayat make use of this construct, the truth of the matter is

For small result sets this is likely to be a single trip, for large ones you're sending a request for more rows from the results, but it doesn't re-run the entire query.

Your linq expression returns an enumeration, and by default the expression executes when you iterate through using the foreach. An IEnumerable linq statement executes when you iterate the foreach, but you yaşama force it to iterate sooner using C# IStructuralComparable nedir .ToList().

for instance, suppose you decided to read a large file line by line and doing something on that, therefore you hayat write your own ReaderEnumrable to read your file

It's for when you want to be able to use an object with a foreach loop, but you don't know exactly C# IStructuralComparable Nasıl kullanılır what type you're dealing with, whether Array, List, or something custom.

The reason, of course, is that C# IStructuralComparable Temel Özellikleri someone can call the first method passing in an array object, a List object, a String object, and so on — any object whose type C# IStructuralComparable Temel Özellikleri implements IEnumerable.

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

The first method advances to the next object in the IEnumerable object that created the enumerator, returning false if it's done, and the second returns the current object.