将AddRange添加到集合 [英] AddRange to a Collection

问题描述

同事今天问我如何向集合添加范围。他有一个继承自 Collection< T> 的类。有一个已经包含一些项目的类型的只有属性。他想将另一个集合中的项目添加到属性集合。他怎么能这样做在C＃3友好的时尚？

A coworker asked me today how to add a range to a collection. He has a class that inherits from Collection<T>. There's a get-only property of that type that already contains some items. He wants to add the items in another collection to the property collection. How can he do so in a C#3-friendly fashion? (Note the constraint about the get-only property, which prevents solutions like doing Union and reassigning.)

当然，这是一个有关Property的foreach。添加将工作。但是 List< T> - 样式AddRange会更加优雅。

Sure, a foreach with Property. Add will work. But a List<T>-style AddRange would be far more elegant.

方法：

public static class CollectionHelpers
{
    public static void AddRange<T>(this ICollection<T> destination,
                                   IEnumerable<T> source)
    {
        foreach (T item in source)
        {
            destination.Add(item);
        }
    }
}

但我有感觉重新发明轮子。我没有在 System.Linq 或 morelinq 。

But I have the feeling I'm reinventing the wheel. I didn't find anything similar in System.Linq or morelinq.

设计不好？只是调用添加？缺少明显的？

Bad design? Just Call Add? Missing the obvious?

推荐答案

不，这似乎是完全合理的。有一个列表< T>。 AddRange（）方法，基本上只是这样，但要求您的集合是一个具体的列表< T> 。

No, this seems perfectly reasonable. There is a List<T>.AddRange() method that basically does just this, but requires your collection to be a concrete List<T>.

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