Question

我正在尝试填充字典词典的字典。但是，当我尝试填充我的第三个字典时，我得到以下错误。如何在没有出错的情况下填充第二个字典？

The best overloaded method match for 'System.Collections.Generic.Dictionary<string,System.Collections.Generic.Dictionary<string,
 System.Collections.Generic.List<string>>>.this[string]' has some invalid arguments 


//code

ClientsData.Add(new MapModel.ClientInfo { Id = IDCounter, Doctors = new Dictionary<string, Dictionary<string,List<string>>>() });

ClientsData[0].Doctors.Add(Reader["DocID"].ToString(), new Dictionary<string,List<string>>());

ClientsData[0].Doctors[0].Add("Name", new List<string>(){ Reader["DocName"].ToString()});//Error occurs here

Answer 1

要访问类似的字典，您需要使用一个密钥，在您的情况下是一个字符串：

ClientsData[0].Doctors[Reader["DocID"].ToString()].Add("Name", new List<string>(){ Reader["DocName"].ToString()});

Answer 2

如果您想使用tripple dictonaries，可以使用以下代码段：

var dict = new Dictionary<string, Dictionary<string, Dictionary<string, string>>>();

dict["level-one"] = new Dictionary<string, Dictionary<string, string>>();
dict["level-one"]["level-two"] = new Dictionary<string, string>();
dict["level-one"]["level-two"]["level-three"] = "hello";

Console.WriteLine(dict["level-one"]["level-two"]["level-three"]);

或者您可以像这样制作自己的包装：

public class TrippleDictionary<TKey, TValue> 
{
    Dictionary<TKey, Dictionary<TKey, Dictionary<TKey, TValue>>> dict = new Dictionary<TKey, Dictionary<TKey, Dictionary<TKey, TValue>>>();

    public TValue this [TKey key1, TKey key2, TKey key3] 
    {
        get 
        {
            CheckKeys(key1, key2, key3);
            return dict[key1][key2][key3]; 
        }
        set
        {
            CheckKeys(key1, key2, key3);
            dict[key1][key2][key3] = value;
        }
    }

    void CheckKeys(TKey key1, TKey key2, TKey key3)
    {
        if (!dict.ContainsKey(key1))
            dict[key1] = new Dictionary<TKey, Dictionary<TKey, TValue>>();

        if (!dict[key1].ContainsKey(key2))
            dict[key1][key2] = new Dictionary<TKey, TValue>();

        if (!dict[key1][key2].ContainsKey(key3))
            dict[key1][key2][key3] = default(TValue);
    }
}

并像这样使用它：

var tripple = new TrippleDictionary<string, string>();
tripple["1", "2", "3"] = "Hello!";

Console.WriteLine(tripple["1", "2", "3"]);

请参阅Demo

如何填充字典词典的字典？

2 个答案: