.NET哈希表克隆

Question

給出以下代碼：

Hashtable main = new Hashtable();

Hashtable inner = new Hashtable();
ArrayList innerList = new ArrayList();
innerList.Add(1);
inner.Add("list", innerList);

main.Add("inner", inner);

Hashtable second = (Hashtable)main.Clone();
((ArrayList)((Hashtable)second["inner"])["list"])[0] = 2;

為什么數組的值在“主”哈希表中從1變為2，因為更改是在克隆上進行的？

Answer 1

您克隆了Hashtable ，而不是其內容。

Answer 2

伙計們，謝謝您的幫助。 我最終得到了這個解決方案：

Hashtable clone(Hashtable input)
{
    Hashtable ret = new Hashtable();

    foreach (DictionaryEntry dictionaryEntry in input)
    {
        if (dictionaryEntry.Value is string)
        {
            ret.Add(dictionaryEntry.Key, new string(dictionaryEntry.Value.ToString().ToCharArray()));
        }
        else if (dictionaryEntry.Value is Hashtable)
        {
            ret.Add(dictionaryEntry.Key, clone((Hashtable)dictionaryEntry.Value));
        }
        else if (dictionaryEntry.Value is ArrayList)
        {
            ret.Add(dictionaryEntry.Key, new ArrayList((ArrayList)dictionaryEntry.Value));
        }
    }

    return ret;
}