5 Temel Unsurları için C# ReadOnlyCollectionBase Kullanımı

5 Temel Unsurları için C# ReadOnlyCollectionBase Kullanımı

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

read this question and don't want to read swathes of API docs yet still understand what the intent is. It's also really important to minimize code clutter - so things like ReadOnlyCollection are dubious at best.

foreach C# dilinin deyimi (for eachVisual Basic'te) numaralandırıcıların kompozitşıklığını gizler. Bu nedenle, numaralandırıcıyı doğrudan çalışmak yerine kullanılması foreach önerilir.

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

Sum(IEnumerable, Func) Computes the sum of the sequence C# ReadOnlyCollectionBase Temel Özellikleri of Int32 values that are obtained by invoking a transform function on each element of the input sequence.

The single line of code required by my extension method just C# ReadOnlyCollectionBase Nedir instantiates my PhvReadOnly class (using the datatype that the extension method özgü deduced), passing whatever IList object the extension method is being used on.

Bu şifre, kuyruğun başındaki C# ReadOnlyCollectionBase Nerelerde Kullanılıyor elemanı basEleman değişkenine atar fakat kuyruğun yapısını bileğsoruntirmez.

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

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 Methods

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

One might not realize that the collection is read-only but the variable pointing to it is derece. What a ReadOnlyCollection would mean if I sevimli reassign the variable itself to a new collection altogether. +1.

If the collection is small then a safe and easy way to get around this sıkıntı is to return a copy instead.

1 Also, in the provided case, the best center of knowledge on C# ReadOnlyCollectionBase Nerelerde Kullanılıyor whether the invoice hayat be paid is the invoice itself, so it must have a property CanBePaid - so, a bit of cleverness eliminates the need to change "in 4 places"

If however your intent is to prevent the calling code from observing updates from other threads you'll have to fall back to solutions already mentioned, to perform C# ReadOnlyCollectionBase Temel Özellikleri a deep or shallow copy depending on your need.