Deserialize JSON array to string array with JSON.NET

Question

I'm trying to deserialize a JSON array to a string list with:

Newtonsoft.Json.Linq.JArray jsonResponse = JsonConvert.DeserializeObject(result) as Newtonsoft.Json.Linq.JArray;
List<string> response = jsonResponse.ToObject<List<string>>();

The JSON has the following structure:

[["No Es Posible Importar Dos Numeros De Servicios Iguales","No Es Posible Importar Dos Codigos Iguales"]]

But that throws the following error:

Error reading string. Unexpected token: StartArray. Path '[0]'.

How I can deserialize the object without errors?

why does your json start with two [[? did you intend to have an array inside an array? — Claies
– Claies, Commented Mar 27, 2018 at 22:42
It's a nested, jagged array so do var lists = JsonConvert.DeserializeObject<List<List<string>>(result). There's no need for the intermediate JArray representation by the way. — dbc
– dbc, Commented Mar 27, 2018 at 22:45
@Claies i dont now, im receiving the string from a web service, when i put this in a JSON viewer works fine — Brayan Zavala
– Brayan Zavala, Commented Mar 27, 2018 at 22:45
it's a list of lists of strings, so you either need to use the option @dbc mentioned, or List<List<string>> response = jsonResponse.ToObject<List<List<string>>>() — Claies
– Claies, Commented Mar 27, 2018 at 22:48

Brayan Zavala · Accepted Answer · 2018-03-27 23:01:12Z

4

Thanks!!!

i followed the recommendations in the comments and all is working fine.

i only changed the code to:

var jsonResponse = JsonConvert.DeserializeObject<List<List<string>>>(result);

to get a list of lists.

answered Mar 27, 2018 at 23:01

Brayan Zavala

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user9244629 · Accepted Answer · 2018-03-27 22:50:40Z

1

This should work:-

var list = JArray.Parse(@"[[""a"", ""b"", ""c""]]").Values().Select(x => x.Value<string>()).ToList();

Hope that helps!

answered Mar 27, 2018 at 22:50

user9244629

Comments

App-Devon · Accepted Answer · 2018-03-28 00:21:50Z

1

I had spent some time working on this with a C# Fiddle (I love these for collaboration) while you got it running locally, but I took your solution and put it into a fiddle so that some others later might have complete code that runs and they can play with.

https://dotnetfiddle.net/mAU6gi

Additionally this highlights the need to include, and has the nuget packages needed readily available on the page!

using Newtonsoft.Json;
using System.Collections.Generic;

This also then shows a user how to enumerate their new nested list and display all of the values in the order they came in from the JSON.

Thanks! -App-Devon

edited Mar 28, 2018 at 0:21

answered Mar 27, 2018 at 23:30

App-Devon

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