如何从c＃中的嵌套字典中获取数据

Question

我需要从嵌套字典 IN C＃中获取数据。我的词典是这样的：

static Dictionary<string, Dictionary<ulong, string>> allOffset = 
  new Dictionary<string, Dictionary<ulong, string>>();

我需要获取完整字典的所有键/值，如下所示：

string->>ulong, string

提前致谢。

Answer 1

迭代外部字典，每次迭代嵌套字典的成员，即

（未经测试的代码）

foreach(var key1 in dc.Keys)
{
    Console.WriteLine(key1);
    var value1 = dc[key1];
    foreach(var key2 in value1.Keys)
    {
        Console.WriteLine("    {0}, {1}", key2, value1[key2]);
    }
}

Answer 2

LINQ答案（读取所有三元组）：

var qry = from outer in allOffset
          from inner in outer.Value
          select new {OuterKey = outer.Key,InnerKey = inner.Key,inner.Value};

或（直接获取字符串）：

var qry = from outer in allOffset
          from inner in outer.Value
          select outer.Key + "->>" + inner.Key + ", " + inner.Value;

foreach(string s in qry) { // show them
    Console.WriteLine(s);
}

Answer 3

或一线解决方案

allOffset.SelectMany(n => n.Value.Select(o => n.Key+"->>"+o.Key+","+ o.Value))
         .ToList()
         .ForEach(Console.WriteLine);

Answer 4

尝试：

string s = dict["key"][_float_];

要获取整个列表，您可以使用嵌套的foreach循环：

        StringBuilder sb=new StringBuilder();
        foreach (var v in dict)
        {
            sb.Append(v.Key+"=>>");
            foreach (var i in v.Value)
            {
                sb.Append(i.Key + ", " + i.Value);
            }
            sb.Append(Environment.NewLine);
        }

        Console.WriteLine(sb);

Answer 5

这个怎么样，该方法将枚举所有字典项...

public static IEnumerable<KeyValuePair<ulong, string>> GetValues()
{
    foreach (var pair in allOffset.Values)
    {
        foreach (var value in pair)
        {
            yield return value;
        }
    }
}