[펌] Get dictionary key by value

How do I get a Dictionary key by value in C#?

Dictionary<string, string> types = new Dictionary<string, string>()
{
    {"1", "one"},
    {"2", "two"},
    {"3", "three"}
};

 

 

[Answer]

Values do not necessarily have to be unique, so you have to do a lookup. You can do something like this:

var myKey = types.FirstOrDefault(x => x.Value == "one").Key;

If values are unique and are inserted less frequently than read, then create an inverse dictionary where values are keys and keys are values.

 

 

[출처] https://stackoverflow.com/questions/2444033/get-dictionary-key-by-value

Get dictionary key by value

 

[참조] https://miuna3.tistory.com/81

C# 사전 Dictionary의 Value 값으로 Key 찾기