Convert object array string to list string

Question

I have object value

{[
  "Temp",
  "Humidity"
]}

I want to Convert it to list string I try

var res= (List<string>)value ;
var res1= value.OfType <List<string>>().ToList();

but it return null

Does this answer your question? [Conversion of System.Array to List](https://stackoverflow.com/questions/1603170/conversion-of-system-array-to-list) — Kristian, Dec 03 '21 at 07:21
Did you try to cast it to an array? `var res= (string[])value ` — Eldar, Dec 03 '21 at 07:21
@eldar i get this err Error: System.InvalidCastException: Unable to cast object of type 'Newtonsoft.Json.Linq.JArray' to type 'System.String[]'. — tu pham, Dec 03 '21 at 07:30
@Kristian i have error cannot convert from 'object' to 'System.Collections.Generic.IEnumerable — tu pham, Dec 03 '21 at 07:32
Ok, now you know the exact type of it. So cast it to the correct type and then Deserialize that `JArray` into string array or list as you want. — Eldar, Dec 03 '21 at 07:32
I later saw that it is a JArray. Either make the conversion typed at source, or Deserialize it converting to string with ToString() (see below). — Cetin Basoz, Dec 03 '21 at 07:47

Cetin Basoz · Accepted Answer · 2021-12-03T07:46:15.247

(Would be mess in a comment). If that is coming in as a string, then you could use Newtonsoft from nuget to convert. ie:

var str = @"{[
  ""Temp"",
  ""Humidity""
]}  ";
var json = str.Trim(new char[] { ' ', '{', '}'});
var strlist = JsonConvert.DeserializeObject<List<string>>(json);

EDIT: Along the comments, you say it is a Newtonsoft.Json.Linq.JArray, then this would do:

var lstString = JsonConvert.DeserializeObject<List<string>>(myObject.ToString());

Convert object array string to list string

1 Answers1