c# - 从字典中选择随机列表并从列表中选择随机项目并将其显示在文本块中？

Question

这是我的代码：

var dict = new Dictionary<string, List<string>>
                       {
                            {"AR", new List<string> {"M4A1", "M16A4", "SCAR-L", "CM901", "TYPE 95", "G36C","ACR 6", "MK14", "AK-47", "FAD"} },
                            {"SM", new List<string> {"MP5","UMP45","PP90M1","P90","PM-9","MP7"}},
                            {"LM", new List<string>{"L86 LSW","MG36", "PKP PECHENEG","MK46","M60E4"}},
                            {"SR", new List<string>{"BARRET .50 CAL","L118A","DRAGUNOV","AS50","RSASS","MSR"}},
                            {"SG", new List<string>{"USA512","KS612","SPAS-12","AA-12","STRIKER","MODEL 1887"}},
                            {"RS", new List<string>{"RIOT SHIELD"}}


                       };

我想在文本框中的这个字典输出中的随机列表中有一个随机项目。谢谢，任何帮助表示赞赏！另外，我正在为 Windows Phone 7 开发，如果它有任何不同的话。

Answer 1

var rand = new Random();

var randList = dict.Values[rand.Next(dict.Count - 1)];
var randomWord = randList[rand.Next(randList.Count - 1)];

Answer 2

从这里：字典中的随机条目

有一种更有效的方法可以将字典随机化一次并使其可供选择：

public IEnumerable<TValue> RandomValues<TKey, TValue>(IDictionary<TKey, TValue> dict)
{
    Random rand = new Random();
    List<TValue> values = Enumerable.ToList(dict.Values);
    int size = dict.Count - 1;
    while(true)
    {
        yield return values[rand.Next(size)];
    }
}

接着：

var rand = new Random();
var randomDict = RandomValues(dict);
var randList = randomDict.First();
var randVal = randList[rand.Next(randList.Count - 1)];