通用的方法集合中创建的所有元素的深层副本 [英] Generic method to create deep copy of all elements in a collection

问题描述

我有不同的对象类型的各种ObservableCollections。我想写其中每个元素是给定的集合中元素的深层副本，将采取任何这些对象类型的集合，并返回一个新的集合一个方法。下面是一个例子了specifc类

I have various ObservableCollections of different object types. I'd like to write a single method that will take a collection of any of these object types and return a new collection where each element is a deep copy of elements in the given collection. Here is an example for a specifc class

   private static ObservableCollection<PropertyValueRow> DeepCopy(ObservableCollection<PropertyValueRow> list)
   {
        ObservableCollection<PropertyValueRow> newList = new ObservableCollection<PropertyValueRow>();
        foreach (PropertyValueRow rec in list)
        {
            newList.Add((PropertyValueRow)rec.Clone());
        }
        return newList;
   }

我怎样才能使这种方法一般用于其实现ICloneable任何一类？

How can I make this method generic for any class which implements ICloneable?

推荐答案

您可以做这样的事情：

private static ObservableCollection<T> DeepCopy<T>(ObservableCollection<T> list)
    where T : ICloneable
{
   ObservableCollection<T> newList = new ObservableCollection<T>();
   foreach (T rec in list)
   {
       newList.Add((T)rec.Clone());
   }
   return newList;
}

请注意，你可以使这个更普遍采取的IEnumerable＆LT; T＆GT; 和LINQ使得它更容易：

Note that you could make this more general by taking IEnumerable<T>, and LINQ makes it even easier:

private static ObservableCollection<T> DeepCopy<T>(IEnumerable<T> list)
    where T : ICloneable
{
   return new ObservableCollection<T>(list.Select(x => x.Clone()).Cast<T>());
}

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