Büyülenme Hakkında C# IEnumerable Temel Özellikleri

Büyülenme Hakkında C# IEnumerable Temel Özellikleri

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IEnumerable bütün verileri düzenıp memory bile sara, sorgulama aksiyonlemlerini memory üzerinden yaparken IQueryable ise şartlara ilişkilı query oluşturarak vasıtasız veritabanı üzerinden sorgulama aksiyonlemi yapar.

Many of the LINQ methods, including Where, use deferred execution. In this case you hayat think of the IEnumerable birli a query, rather than the actual result set.

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

IEnumerable execute a select query on the server side, load data in-memory on a client-side and then filter data

(kakım per Mike P's excellent answer) wrap an enumerator to pretend to be enumerable, there are some things that you yaşama't really do - for example, it is hoped

They usually have a GetXXX method that returns a IEnumerable of whatever type the custom collection class uses so the internal collection can be iterated around using a foreach loop.

So if I am going through all the items on ebay, one at a time would be something even a small computer sevimli handle, but ".ToList()" would surely run me out of memory, no matter how big my computer was. No computer dirilik by itself contain and handle such a huge amount of data.

What US checks and balances prevent the FBI from raiding politicians unfavorable to the federal government?

What US checks and balances prevent the FBI from raiding politicians unfavorable to the federal government?

Marc GravellMarc Gravell 1.0m271271 gold badges2.6k2.6k silver badges2.9k2.9k bronze badges 1 1 The mistake with "Reset" was with just having one type of enumerable. IMHO, there should have been an IMultipassEnumerable, inheriting IEnumerable, which would support Reset and guarantee that multiple passes will either return identical veri or C# IStructuralComparable nerelerde kullanılıyor throw an exception; an ordinary IEnumerable whose collection was modified should be allowed to return 'sensible' veri C# IStructuralComparable nerelerde kullanılıyor if it's able to do so or throw an exception C# IStructuralComparable Temel Özellikleri if it sevimli't, and an ISafeEnumerable, which would be expected to work sensibly (without throwing an exception) even if a collection changes. A bit late now to change things, though.

And that might be useful and more C# IStructuralComparable Nasıl kullanılır efficient in certain cases. For example, your class might hamiş hold any collection in memory, but rather iterate over all files existing in a certain directory, or items in certain DB, or other unmanaged resources. IEnumerable hayat step in and do it for you (you could also do it without IEnumerable, but IEnumerable "fits" conceptually, plus it gives you the benefit of being able to use the object produced in a foreach loop).

Generally, don't worry about what's actually in the IEnumerables, birli it will be completely different from your actual code. Only worry about the actual output when you iterate over it :)

My question is that should C# IEnumerable Nedir these classes instead implement the IEnumerable interface, and call GetEnumerator on the List itself.

Short story about a boy living on a fake tropical island / paradise planet, who was actually an adult CEO but didn't remember it