C# ReadOnlyCollectionBase Kullanımı Için 5-İkinci Trick

C# ReadOnlyCollectionBase Kullanımı Için 5-İkinci Trick

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

IEnumerable başmaklık been used to represent a read-only collection of veri since the earliest versions of .Kemiksiz. The read-only collection interfaces available in .Kupkuru Core and .Kupkuru 5 enable you to design classes that prevent the collections from being modified.

Example. In this izlence, a list of ints is created, and then the ReadOnlyCollection constructor is used with that List as an argument. Inside the ReadOnlyCollection constructor, a reference to the argument is stored birli an IList reference field.

Sum(IEnumerable, Func) Computes the sum of the sequence of Single values that are obtained by invoking a transform function on each element of the input sequence.

Summary. The ReadOnlyCollection functions as a wrapper for any collection that implements IList. It adds a level of indirection that reduces possible changes.

Your implementation depends on your needs: - If you don't care about the caller (Class B) from seeing any further changes to the collection then you emanet just clone the collection, hand it out, and stop caring. - If you definitely need the caller (Class B) to see changes that are made to the collection, and you C# ReadOnlyCollectionBase Kullanımı want this to be thread-safe, then you have more of a sorun on your hands.

Thous leads that your consumer classes are just awaiting interfaces instead of concrete classes and so you güç change the concrete implementation at a later stage without breaking your public contract (due to performance reasons use an List instead of a LinkedList or vice versa).

Özellikle verilerin belirli bir sıraya nazaran işlenmesi müstelzim durumlarda, C# ReadOnlyCollectionBase Nerelerde Kullanılıyor Queue yararlanmaı yazılım projelerinin verimliliğini pozitifrabilir.

Dan TaoDan Tao 128k5656 gold badges308308 silver badges448448 bronze badges 4 I'd like to avoid noise in both callee and caller. Exposing a ReadOnlyCollection birli anything other than itself C# ReadOnlyCollectionBase Temel Özellikleri isn't necessary: after all, exposing it kakım an IList just gets confusing (where'd I get this IList from - hayat I modify it?), and any IList is exposable birli ReadOnlyCollection so there's no C# ReadOnlyCollectionBase Nerelerde Kullanılıyor loss of generality.

What is the term for when a hyperlink maliciously opens different URL from URL displayed when hovered over?

Now the error makes sense, it's true I do derece have a default constructor. However I am able to Serialize a ReadOnlyCollection using the DataContractSerializer even though ReadOnlyCollection does not have a parameterless default constructor.

Important Some information relates to prerelease product that may be substantially modified before C# ReadOnlyCollectionBase Nerelerde Kullanılıyor it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

If you need to do more than the InnerList property will let you, the base class Items property will hand you back the whole List. Bey I said, creating a read-only collection class in .

Chances are, you'll never notice this difference, but if this is a hot-tanıtımcık in your code and requires every last bit of performance you can squeeze out of it, why derece use an Array instead? That would be faster still.