如何使一个深拷贝词典模板 [英] How to make a deep copy Dictionary template

问题描述

我有以下的方法，使一个深拷贝字典的：

I have the following method that makes a deep copy of a dictionary:

public static Dictionary<string, MyClass> deepCopyDic(Dictionary<string, MyClass> src)
{
    //Copies a dictionary with all of its elements
    //RETURN:
    //      = Dictionary copy
    Dictionary<string, MyClass> dic = new Dictionary<string, MyClass>();
    for (int i = 0; i < src.Count; i++)
    {
        dic.Add(src.ElementAt(i).Key, new MyClass(src.ElementAt(i).Value));
    }

    return dic;
}

我在想，我能以某种方式使之成为一个模板？我需要 MyClass的是一个模板。

推荐答案

您可以使用泛型与其中TValue：ICloneable 约束：

You can use Generics with where TValue : ICloneable constraint:

public static Dictionary<TKey, TValue> deepCopyDic<TKey, TValue>(Dictionary<TKey, TValue> src)
    where TValue : ICloneable
{
    //Copies a dictionary with all of its elements
    //RETURN:
    //      = Dictionary copy
    Dictionary<TKey, TValue> dic = new Dictionary<TKey, TValue>();
    foreach (var item in src)
    {
        dic.Add(item.Key, (TValue)item.Value.Clone());
    }

    return dic;
}

您将不得不执行 ICloneable 接口在每一个类，你想传递到该方法。

You'll have to implement ICloneable interface in every class you'd like to pass into that method.

还是有点改良版，与键克隆，以及：

Or a bit improved version, with Key cloned as well:

public static Dictionary<TKey, TValue> deepCopyDic<TKey, TValue>(Dictionary<TKey, TValue> src)
    where TValue : ICloneable
    where TKey : ICloneable
{
    return src.ToDictionary(i => (TKey)i.Key.Clone(), i => (TValue)i.Value.Clone());
}

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