Eğer milyonlarca kayıt üzerinde sorgulama teamüllemi dokumayorsak elbette IQueryable IEnumerable bakarak elan hızlı sorgulama fiillemi yapar.
are two properties in particular—one that points to a query provider (e.g., a LINQ to SQL provider) and another one pointing to a query expression representing the IQueryable object as a runtime-traversable abstract syntax tree that dirilik be understood by the given query provider (for the most part, you emanet't give a LINQ to SQL expression to a LINQ to Entities provider without an exception being thrown).
The second example returns an IEnumerable that contains all the information needed to run the query later on.
There are many differences but let us discuss about the one big difference which makes the biggest difference. IEnumerable interface is useful when your collection is loaded using LINQ or Entity framework and you want to apply filter on the collection.
Will I run into issues if I connect a shunt 50 ohm resistor over a high impedance input pin on an IC?
Bu maslahatlemleri tamamladıktan sonra foreach içinde Firma sınıfını kullanmayı denersek hata vermeyecektir.
IEnumerable is a generic interface describing something that güç be enumerated (you kişi iterate through it and see/retrieve all of its elements). C# IEnumerable Nasıl Kullanılır The content of this IEnumerable yaşama have been pre-generated, or is live/lazily generated when you try to iterate through 'result' (IEnumerable).
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.)
Where the execution will be performed out-of-process, the logic of the query başmaklık to be represented in data such that the LINQ provider kişi convert it into the appropriate form for the out-of-memory execution - whether that's an LDAP query, SQL or whatever.
There are pros and cons to both. If you call ToList, you may remove some mystery birli to when the query gets executed. If you stick to IEnumerable, you get the advantage that the program doesn't do any work until it's actually required.
IEnumerable is refering to a collection but IQueryable is just a query and it will be generated inside C# IEnumerable Kullanımı a Expression Tree.we will run this query to get veri from database. Share Follow
Want to improve this question? Update the question so it focuses on one sorun only by editing this post.
RastoRasto 17.6k4848 gold badges161161 silver badges253253 bronze badges 5 1 Unfortunately you have C# IEnumerable Nedir to make your own. The most conservative approach would be for you to cache all the items inside your new enumerable, to handle enumerators that hayat C# IEnumerable Nasıl Kullanılır only be enumerated once, so there is no general class for this in the runtime.
The most important thing to realize is that, using Linq, the query C# IEnumerable Nerelerde Kullanılıyor does hamiş get evaluated immediately. It is only run birli part of iterating through the resulting IEnumerable in a foreach - that's what all the weird delegates are doing.