C# ReadOnlyCollectionBase Kullanımı Için 5-İkinci Trick
C# ReadOnlyCollectionBase Kullanımı Için 5-İkinci Trick
Blog Article
Best practice to create typed collections/lists with internal or private Add, Remove functionality? 2
An instance of the ReadOnlyCollection generic class is always read-only. A collection that is read-only is simply a collection with a wrapper that prevents modifying the collection; therefore, if changes are made to the underlying collection, the read-only collection reflects those changes. See Collection for a modifiable version of this class.
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 bey 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.
The following code snippet illustrates how IReadOnlyList hayat be used in place of List in the above method.
Kakım per the comments below, you can prevent the possibility of downcasting by making IWriteableMyItem and WriteableMyItem private or internal. However note that this could still be circumvented via reflection - but we are protecting against accidents rather than fraud.
Use ObservableCollection/ListViewCollection and make your own custom ReadOnlyObservableCollection wrapper like in #1 that doesn't implement Add or modifying properties and methods.
Zımnında şiddet istenirse Array, azca bellek kullanımı istenirse List tercih edilmelidir. şayet koleksiyona eklenicek tip sınırlı bileğilse ArrayList kullanılabilir. Ancak aynı maslahatlevi generic listemizde alınlayabilme yetisine sahiptir.
Finally, the code example creates an array larger than the collection and uses the CopyTo method to insert the elements of the collection into the middle of the array.
Peter Vogel is C# ReadOnlyCollectionBase Nasıl Kullanılır a system architect and principal in PH&V Information Services. PH&V provides full-stack consulting from UX design through object modeling to database design. Peter tweets about his VSM columns with the hashtag #vogelarticles. His blog posts on user experience design gönül be found at .
Descendants(IEnumerable) Returns a C# ReadOnlyCollectionBase Nedir collection of elements that contains the descendant elements of every element and document in the source collection.
First, some definitions: A read-only collection is like a List in that it supports iterating through the items with a For…Each loop or C# ReadOnlyCollectionBase Nasıl Kullanılır retrieving an item in the collection by position.
On the other hand, let's say you have a ReadOnlyCollection(StringBuilder). This is kind of a C# ReadOnlyCollectionBase Nasıl Kullanılır strange thing to have, but it is acceptable. You güç still change the individual StringBuilder objects by C# ReadOnlyCollectionBase Nasıl Kullanılır accessing their methods.
Sum(IEnumerable, Func) Computes the sum of the sequence of nullable Decimal values that are obtained by invoking a transform function on each element of the input sequence.