C# ReadOnlyCollectionBase Nasıl Kullanılır Aptallar için

C# ReadOnlyCollectionBase Nasıl Kullanılır Aptallar için

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I had a client recently who wanted me to create a class that exposed a read-only collection through one of the class properties. While my client was willing to let other programs loop through that collection and retrieve items from the collection by position, he didn't want to let those programs add or remove items from the collection. In the Microsoft .Safi Framework 4.5 you emanet use the read-only collections that Eric Vogel covered in an earlier C# Corner column, "The New Read-Only Collections in .Kupkuru 4.5," to define that property. My client, however, was working with the .Kemiksiz Framework 4 and didn't intend to upgrade. Fortunately, in earlier versions of .Kemiksiz you güç also create a read-only class from an existing List just by calling your List's AsReadOnly method. However, if you need something special (a List that users yaşama add items to but not remove items from), inheriting from the ReadOnlyCollectionBase class makes that very easy to do.

Which means that I always have to cast the items back to MyItem when I want to use them. Also the items gönül be casted into MyItem outside the class.

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

Distinct(IEnumerable) Returns distinct elements from a sequence by using the default equality comparer to compare values.

Istifham 1: C# Metot nedir? C# Metot, C# ReadOnlyCollectionBase Nedir sınırlı bir konulevi yerine getiren kod bloklarını mideermiş bünyelardır. Metotlar, kodun baştan kullanılabilirliğini pozitifrır ve şifre karmaşıklığını azaltır.

Sam Allen is passionate about computer languages. In the past, his work başmaklık been recommended by Apple and Microsoft and he özgü studied computers at a selective university in the United C# ReadOnlyCollectionBase Nedir States.

Finally, the code example creates an array larger than the collection and uses the CopyTo method to insert the C# ReadOnlyCollectionBase Nedir elements of the collection into the middle of the array.

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Implementers are encouraged to extend this base class instead C# ReadOnlyCollectionBase Nasıl Kullanılır of creating their own. Members of this base class are protected and are intended to be used through a derived class only.

1 Gotta agree with DarkWanderer here. Collections should be just that: collections. There are many other ways to centralize business logic without breaking the single responsibility principle. Plus, making your collection more "clever" may actually confuse the using developer more than it helps him.

The following code example demonstrates several members of the ReadOnlyCollection class. The code example creates a List of strings and adds four dinosaur names to it. The code example then wraps the list in a ReadOnlyCollection.

I don't know if there is any way of protecting non-atomic elements without cloning them before placing them in the read only list. Share Improve this answer Follow