使用字典作为其他字典中的关键 [英] using dictionary as a key in other dictionary

问题描述

我想在另一个字典中使用字典作为 TKey 。类似于python的东西。我试过这个，但是它给了我错误。

I would like to use Dictionary as TKey in another Dictionary. Something similar to python. I tried this but it gives me errors.

Dictionary<Dictionary<string, string>, int> dict = new Dictionary<Dictionary<string,    string>, int>();
Dictionary<string, string> dict2 = new Dictionary<string, string>();
dict2["abc"] = "def";
dict[dict["abc"] = 20;

推荐答案

给你什么错误？是否抱怨您在第4行的缺失支架？

What error is it giving you? Is it complaining about your missing bracket on line 4?

第4行看起来应该是：

dict[dict["abc"]] = 20;

但是，您可能意味着这一点，因为abc不是dict的关键：

However, you probably mean this, since "abc" is not a key of dict:

dict[dict2["abc"]] = 20;

但 dict2 [abc] 一个字符串，当dict的关键字应该是一个字典< string，string> 。

But dict2["abc"] is a string, when the key of dict is supposed to be a Dictionary<string, string>.

但是，在这个路径走得很远之前，我们再来重新检查一下原来的目标。您不应该首先将可变类型用作字典键。

But let's re-examine your original goal at this point before going to far down this path. You shouldn't be using mutable types as dictionary keys in the first place.

这可能是您要查找的代码：

This may be the code you're looking for:

Dictionary<string, int> dict  = new Dictionary<string, int>();
Dictionary<string, string> dict2 = new Dictionary<string, string>();
dict2["abc"] = "def";
dict[dict2["abc"]] = 20;

但是很难确定。

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