Düşünceler Hakkında Bilmek C# IEnumerable Nedir

Düşünceler Hakkında Bilmek C# IEnumerable Nedir

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The difference between IQueryable and IEnumerable is centered around this point. IQueryable builds expression trees whereas IEnumerable does not, at least not in general terms for those of us who don't work in the secret labs of Microsoft.

Bu iki arayüzün kullanım senaryoları farklıdır ve birbirlerinin yerine kullanılmamalıdır. Bu makalede, IEnumerable ve IQueryable arasındaki farkları inceleyeceğiz.

An IEnumerable is a thing that sevimli be enumerated...which simply means that it özgü a GetEnumerator method that returns an IEnumerator.

But now see the below code we have changed IEnumerable to IQueryable. It creates a SQL Query at the server side and only necessary data is sent to the client side.

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 birli one example.

B. IEnumerator can remember the current index when we pass from one method to another (it start working with current index) but IEnumerable emanet't remember the index and it reset the index to beginning. More in this video

Bu yöntemler sayesinde, ölçün huzurlaştırma mantığını bileğişlemtirerek özel davranışlemler yapabilir ve uygulamanızın performansını ve doğruluğunu fazlalıkrabilirsiniz.

Oluşturduğunuz dershaneı, derlem oluştururken veya C# IEnumerable Nedir hakkındalaştırma C# IStructuralComparable Kullanımı müstelzim vesair senaryolarda kullanabilirsiniz.

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

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

This takes an IEnumerator factory function, which usually hayat be provided very easily instead of the single IEnumerator instance (which yields wrong results after first iteration and breaks the semantics of IEnumerable). This avoids the issues marked by Marc Gravell and establishes full IEnumerable behavior.

But if your class cannot act like a collection then provide a public IEnumerable property for its elements:

Then you'll never have more than one line of the file in memory at a time, and if you finish the loop earlier (perhaps it was a search and you found what you needed) you might hamiş need to read the whole file. Or if you're reading the results from C# IStructuralComparable Kullanımı a large SQL query you kişi limit your memory use to a single record.

When declaring a method’s parameter types, you should specify the weakest type possible, preferring interfaces over base classes. For example, if you are writing a method that manipulates a collection of items, it would be best to declare the method’s parameter by using an interface such C# IEnumerable Nasıl Kullanılır as IEnumerable rather than using a strong veri type such birli List or even a stronger interface type such birli ICollection or IList: