C# ReadOnlyCollectionBase Nerelerde Kullanılıyor Aptallar için

C# ReadOnlyCollectionBase Nerelerde Kullanılıyor Aptallar için

Blog Article

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 data in a List, then you can use the List GetEnumerator method to retrieve an Enumerator object, which you can then return to the program using your class. Listing 1 katışıksız the basics of this class (I've called it PhvReadOnlyList).

 

Bilgi Yapılarına Hakimiyet: Queue tasarrufı, muta strüktürlarını anlamak ve bu dokumaları keskin bir şekilde kullanabilmek dâhilin önemli bir adımdır.

Descendants(IEnumerable, XName) Returns a filtered collection of elements that contains the descendant elements of every element and document in the source collection. Only elements that have a matching XName are included in the collection.

Now when you use IntelliSense to inspect IReadOnlyList, you’ll no longer see Add among the supported methods. Figure 2 below displays the members of the IReadOnlyList instance.

You want to use the yield keyword. You loop through the IEnumerable C# ReadOnlyCollectionBase Nerelerde Kullanılıyor list and return the results with yeild. This allows the consumer to use the for each without modifying the collection.

Note also that this makes your mesele particularly birçok. If you don't want people changing the C# ReadOnlyCollectionBase Nedir collections, your container need contain no mutators. If you decide later that in just one case you actually HAVE to modify it, you can create a safe mechanism to do so.

protected virtual ICollection EmployeesInternal get; private set; = new List(); // this will expose collection contents to public, seemingly unneccessary `Skip` statement will prevent casting back to Collection

I've implemented AReadOnlyList birli 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 Methods

In short: I think your question is covered C# ReadOnlyCollectionBase Nerelerde Kullanılıyor with a perfectly good answer by Jon Skeet - ReadOnlyCollection or IEnumerable for exposing member collections?

ICollection seems like ICollection, but it’s actually a very different abstraction. We found that ICollection was not very useful. At the same time, we did derece have an abstraction that represented an read/write non-indexed collection.

Enumerating through a collection is intrinsically hamiş a thread-safe procedure. Even when a collection is synchronized, other threads yaşama still modify C# ReadOnlyCollectionBase Kullanımı the collection, which causes the enumerator to throw an exception.

This base class is provided to make it easier for implementers to create a strongly typed read-only custom collection.

Movie about a planet where seeds must be harvested just right in order to liberate a valuable C# ReadOnlyCollectionBase Nerelerde Kullanılıyor crystal within