5 Temel Unsurları için C# IEnumerable Kullanımı
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IEnumerable tüm verileri kızılıp memory de tutarak, sorgulama kârlemlerini memory üzerinden yaparken IQueryable ise şartlara demetlı query oluşturarak aracısız veritabanı üzerinden sorgulama kârlemi yapar.
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
The second method allows only List objects to be passed in; it will not accept an array or a String object. Obviously, the first method is better because it is much more flexible and can be used in a much wider range of scenarios.
A. We iterate the list in different way, foreach birey be used for IEnumerable and while loop for IEnumerator.
What about IEnumerable, its just a way to make a returning type generic, and not make strong coupling to List type.
static public IEnumerable VerileriGetir() yield return "Pazartesi"; yield return "Salı"; yield return "Çarşamba"; yield return "Perşembe"; yield return "Cuma"; yield return "Cumartesi"; yield return "Pazar"; Şimdi dundaki kod bloğunu detaylıca inceleyelim.
IQueryable allows for out-of memory things like a remote veri source, such bey a database or web service.
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.
Else use an IEnumerable. The default should be to use the on-demand evaluation in the second example, as that generally uses less memory, unless C# IEnumerable Nasıl Kullanılır there is a specific reason to store the results in a list.
List, on the other hand, is a specific implementation of IEnumerable that stores the objects in a specific, known manner. Internally, this may be a very good way to store your values that you expose via IEnumerable, but a C# IEnumerable Kullanımı List is hamiş always appropriate.
This güç be very useful in certain circumstances, for C# IEnumerable Temel Özellikleri instance in a massive database table you don't want to copy the entire thing into memory before you start processing C# IEnumerable Kullanımı the rows.
something is up with your image link, its derece rendering in the post body for some reason codeproject.com/KB/cs/646361/WhatHowWhere.jpg
Then you'll never have more than one line of the file in memory at C# IEnumerable Temel Özellikleri a time, and if you finish the loop earlier (perhaps it was a search and you found what you needed) you might derece need to read the whole file. Or if you're reading the results from a large SQL query you gönül sınır your memory use to a single record.
Bu metodun amacı garbage collector’ı beklemeden kullanılan referans tipi değaksiyonkenleri teamülleri bittikten sonrasında ramden temizleyebilmektir.IEnumerable,IEnumerator interface’leri C# 2 ile yan yana gelmiş ve IEnumerable,IEnumerator interface’lerinden kalıt alınmıştır.Kategorikçbirliı temelde aynı hizmeti yapmakla bile bu yazdıklarımı dikkate aldığınızda,generic konstrüksiyonları kullanmanız elan yakınlarında görünmektedir.