Array to JSON (key/ Value)

Question

I would like achieve Array to JSON object conversion in C# code.

Array : [a,b,c,d,e,f]

Json: {"a":"b","c":"d","e":"f"}

I tried to serialize the Array using newtonsoft and the output is not in a key value format. The input is an array of strings and the output need to be in JSON format key/value format.

Does this answer your question? [How do I turn a C# object into a JSON string in .NET?](https://stackoverflow.com/questions/6201529/how-do-i-turn-a-c-sharp-object-into-a-json-string-in-net) — Charlieface, Feb 09 '21 at 17:41
It looks like you should iterate over your array, taking alternate values as keys or values, adding them to whatever JSON library representation you're using (JObject). Which JSON library are you using, and have you tried anything and got stuck? — Jon Skeet, Feb 09 '21 at 17:42
Thanks for all responses. I tried serialize of the object (newtonsoft) and the output is not a key value format. The input is array of string and the output need to be in JSON format. — Anshu, Feb 09 '21 at 18:47

dbc · Answer 1 · 2021-02-09T20:19:38.660

Given a string [] array, you can convert it to a dictionary using LINQ, then serialize the dictionary.

E.g. using json.net:

var dictionary = array.AsPairs().ToDictionary(t => t.Key, t => t.Value);
var newJson = JsonConvert.SerializeObject(dictionary, Formatting.Indented);

Demo fiddle #1 here.

Or, to serialize with system.text.json do:

var newJson = JsonSerializer.Serialize(dictionary, new JsonSerializerOptions { WriteIndented = true });

Demo fiddle #2 here.

Both options use the extension method:

public static class EnumerableExtensions
{
    public static IEnumerable<(T Key, T Value)> AsPairs<T>(this IEnumerable<T> enumerable)
    {
        return AsPairsEnumerator(enumerable ?? throw new ArgumentNullException());
        static IEnumerable<(T key, T value)> AsPairsEnumerator(IEnumerable<T> enumerable)
        {
            bool saved = false;
            T key = default;
            foreach (var item in enumerable)
            {
                if (saved)
                    yield return (key, item);
                else
                    key = item;
                saved = !saved;
            }
        }
    }
}

And generate the result

{
  "a": "b",
  "c": "d",
  "e": "f"
}

@Anshu - you're welcome. If the question is answered please do [mark it as such](https://meta.stackexchange.com/q/86978). — dbc, Feb 11 '21 at 02:30

Array to JSON (key/ Value)

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