How to Convert a Map to a JSON String in Dart

How to Convert a Map to a JSON String in Dart ?

Answer

To convert a map to a JSON string in Dart, you can use the jsonEncode function from the dart:convert library. This function converts a Dart object (such as a map) into a JSON string.

✐ Examples

1 Converting a Map to a JSON String

We can convert a map to a JSON string in Dart using the jsonEncode function from the dart:convert library.

For example,

We start by importing the dart:convert library.
We declare and initialize a map named myMap with key-value pairs.
We convert the map to a JSON string using the jsonEncode function.
We print the resulting JSON string to the console using the print function.

Dart Program

import 'dart:convert';

void main() {
  // Declare and initialize a map
  var myMap = {
    1: 10,
    2: 20,
    3: 30,
    4: 40,
    5: 50
  };

  // Convert the map to a JSON string
  var jsonString = jsonEncode(myMap);

  // Print the resulting JSON string
  print('JSON string from map: $jsonString');
}

Output

JSON string from map: {"1":10,"2":20,"3":30,"4":40,"5":50}

Summary

In this tutorial, we learned How to Convert a Map to a JSON String in Dart language with well detailed examples.

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