C# ReadOnlyCollectionBase Kullanımı A Gizli Silah

C# ReadOnlyCollectionBase Kullanımı A Gizli Silah

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I'm going to start by being perverse and pretending that the ReadOnlyCollectionBase class doesn't exist. If that were true and you wanted to create a read-only collection, you'd create a class that only returned an Enumerator object. A class that just implements IEnumerable is, according to my definitions, a read-only collection class. Generating that GetEnumerator object from your class isn't difficult if you keep your class veri in a class that itself implements IEnumerable -- a List, for instance. If you do keep your veri in a List, then you kişi use the List GetEnumerator method to retrieve an Enumerator object, which you kişi then return to the yetişek using your class. Listing 1 has the basics of this class (I've called it PhvReadOnlyList).

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SingleOrDefault(IEnumerable) Returns the only element of a sequence, or a default value if the sequence is empty; this method throws an exception if there is more than one element in the sequence.

This base class is provided to make it easier for implementers to create a generic read-only custom collection. Implementers are encouraged to extend this base class instead of creating their own.

You dirilik expose private collection properties to EF, allowing for mapping and querying, while still keeping your domain object's members and relationships properly encapsulated. It's a bit messy, but it works:

What's the C# ReadOnlyCollectionBase Temel Özellikleri best way to pass around lists of values without lots of code clutter (such kakım explicit type parameters) but that still communicates intent clearly?

HashTable hash kodlarına gereğince dizdiğinden makul bir sıralaması yoktur.Algoritması bu kodların zarfında gizlidr. Dictionary C# ReadOnlyCollectionBase Nedir ise verilerin ekleniş sırasını hiç bileğhizmettirmeden saklamıştır.

I've implemented AReadOnlyList bey a read-only property because I'm assuming that if you don't want programs adding or removing items from your collection, you probably don't want programs shoving whole new collections into your property, either. Simplifying Code with Extension C# ReadOnlyCollectionBase Nedir Methods

API Entegrasyonu: Dış API'lerden düzenınan verileri C# ReadOnlyCollectionBase Nasıl Kullanılır resmetmek ve yönetmek karınin kullanılabilir, bu da uygulamalar arası veri ilişkiini kolaylaştırır.

Putting that all together, a class that exposes a read-only collection needs three C# ReadOnlyCollectionBase Nasıl Kullanılır things: A property of type PhvReadOnlyList

Nodes(IEnumerable) Returns a collection of the child nodes of every document and element in the source collection.

When you pass around collections instead of writing an object paradigma, entire classes of refactorings will never occur to you.

DefaultIfEmpty(IEnumerable, TSource) Returns the elements of the specified sequence or the specified value in a singleton collection if the sequence is empty.