How to parse a json file into a JsonArray object in C#

Question

I need to parse a json file to a JsonArray object in C#.

[
  {
    "id": 1,
    "first_name": "LAkshan",
    "last_name": "Parcell",
   
  },
  {
    "id": 2,
    "first_name": "Lakshan",
    "last_name": "Clement",
   
  }
]

Json file's contains are like that. I need to get that data into a JsonArray object, not to specific object that created by me. When I try to do it like this

JsonArray list = JsonConvert.DeserializeObject<JsonArray>(File.ReadAllText(JsonFilePath));

It throws this error

Newtonsoft.Json.JsonSerializationException: Unable to find a constructor to use for type System.Text.Json.Nodes.JsonArray. Path '', line 1, position 1.

Do you want to use the Newtonsoft.Json APIs or the System.Text.Json APIs? Pick one. — Sweeper
– Sweeper, Commented Sep 2, 2022 at 7:34
Basically, if you're happy using Newtonsoft.Json, deserialize into JArray instead of JsonArray. — Jon Skeet
– Jon Skeet, Commented Sep 2, 2022 at 7:35
@sweeper Ok I need to get a System JsonArray object by that file. So is there any method to do that using System.Text.Json API? — Pasindu Lakshan
– Pasindu Lakshan, Commented Sep 2, 2022 at 7:36
@ Jon Skeet I need specifically a System JsonArray because it is needed to parse to another package (Fast report data souce) by JsonArray. — Pasindu Lakshan
– Pasindu Lakshan, Commented Sep 2, 2022 at 7:39
@PasinduLakshan you've mixed up different libraries. JsonConvert is a JSON.NET class while JsonArray is a System.Text.Json class. Use JsonSerializer.Deserialize if you want to use System.Text.Json — Panagiotis Kanavos
– Panagiotis Kanavos, Commented Sep 2, 2022 at 10:55

CodingMytra · Accepted Answer · 2022-09-02 10:44:03Z

4

Do this if you want to use JsonArray

JsonArray list = JsonSerializer.Deserialize<JsonArray>(File.ReadAllText(JsonFilePath),
        new JsonSerializerOptions()
        {
            AllowTrailingCommas = true,
        });

edited Sep 2, 2022 at 10:44

answered Sep 2, 2022 at 10:07

CodingMytra

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1 Comment

INLD Over a year ago

His json contains trailing commas so you need to add the corresponding option, otherwise this will throw an exception

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