如何从c#中的嵌套字典中获取数据

Question

我需要从嵌套的Dictionary 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

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 2

或者一线解决方案

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

Answer 3

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]);
    }
}