How do I return a key value pair, where the function returns list<strings>

Question

0.00/5 (No votes)

See more:

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:

C#

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

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

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

Posted 27-Feb-18 2:00am

Avinash Gupta

Updated 27-Feb-18 2:57am

PIEBALDconsult

v2

Add a Solution

Comments

phil.o 27-Feb-18 8:03am

Where would "english" and "spanish" values come from? Are they stored in the database along with "en" and "es" respectively?

Avinash Gupta 27-Feb-18 8:54am

No,It has to be hard coded

Karthik_Mahalingam 27-Feb-18 9:13am

hardcoded in a variable?
show the code

Avinash Gupta 27-Feb-18 9:18am

I want it to be a key for each returning value

Karthik_Mahalingam 27-Feb-18 9:21am

what is the value you are getting in result.Distinct().ToList();
and show how you are storing the mapping

Avinash Gupta 27-Feb-18 9:23am

[ "en",
"es"
]

This is what i am getting

Karthik_Mahalingam 27-Feb-18 9:34am

that is ok , but how will you know that en belongs to english and es belongs to spanish

Avinash Gupta 27-Feb-18 9:46am

Therefore I have to join another table which has description about the codes?

Karthik_Mahalingam 27-Feb-18 22:33pm

then it is simple.

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Answer 1 · 2018-02-27T02:33:00

Solution 1

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:

C#

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

Or a Dictionary:

C#

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

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.

Posted 27-Feb-18 2:33am

OriginalGriff

Comments

PIEBALDconsult 27-Feb-18 8:58am

It can return a snippet of XML or CSV. :D But that seems beyond the abilitites of the OP.

OriginalGriff 27-Feb-18 9:04am

Or JSON, or ...
But yes - that's why I tried to explain why it wasn't going to work!
At least changing the signature will force him to look at the stuff using the method already.

Do you think I should have suggested a list of tuples? :laugh:

Richard MacCutchan 27-Feb-18 9:38am

How about a List of Dictionaries of Lists of Tuples?