如何返回键值对，函数返回列表< strings> [英] How do I return a key value pair, where the function returns list<strings>

问题描述

如何返回一个键值对，函数返回 List< strings> 。

该方法返回一个字符串列表从数据库中获取，现在我希望它将其作为键值对而不是数据库中的唯一值列表返回。



我尝试过：

How do i return a key value pair, where the function returns List<strings>.
The method is returning a list of string fetch from the database, now i want it to return it as key value pair instead of list of only values from the database.

What I have tried:

public List<string> GetLanguagesForMobile()
        {
            var result = _translationService.GetLanguagesForMobile();
            return result.Distinct().ToList();         
        }

Reponse:-
[
  "en",
  "es"
]

Required as:-
{ "english":"en",
"spanish":"es"}

推荐答案

您无法返回键值对或键值列表从设置为返回字符串列表的方法对 - C＃是强类型的，并检查参数类型！



您可以更改方法返回列表键值对：

You can't return a key value pair, or a list of key value pairs from a method that is set up to return a list of strings - C# is strongly typed, and checks parameter types!

You can change the method return a list of key value pairs:

List<KeyValuePair<string, string>> GetLanguagesForMobile()
   {
   ...
   }

或字典：

Or a Dictionary:

Dictionary<string, string> GetLanguagesForMobile()
   {
   ...
   }

并重新编码方法以生成适当的数据 - 但如果将方法声明为返回类型，则可以只返回从中派生的那种类型。

And recode the method to generate the appropriate data - but if you declare a method as returning a type, you can only return that type or types derived from it.

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