如何在字典 C# 中使用元组作为键

How to use a Tuple as a Key in a Dictionary C#(如何在字典 C# 中使用元组作为键)

问题描述

我有一个字典 fieldTracker 它以 Tuple 作为键和 string 作为值.但是，我似乎找不到访问该值的正确方法.这是我当前的代码:

I have a Dictionary fieldTracker which takes a Tuple<int, int> as Key and string as value. However, I can't seem to find the right way to access the value. Here is my current code:

for (int i = 0; i < 2; i++)
  {
    for (int j = 0; j < 5; j++)
      dict.Add(new Tuple<int, int>(i, j), "");
  }
  dict[(1,1)] = "Hello";

我在 Microsoft 文档中搜索了一下，但找不到解决此问题的 关键.

I've searched around a bit in the Microsoft documentation, but can't find the key to this problem.

推荐答案

dict[Tuple.Create(1, 1)] = "Hello";

或使用 C#7 ValueTuple:

var dict = new Dictionary<(int, int), string>();
for (int i = 0; i < 2; i++)
{
    for (int j = 0; j < 5; j++)
        dict.Add((i, j), "");
}
dict[(1, 1)] = "Hello";

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