Deserialize Json Array using Newtonsoft.Json

Question

I have an array of objects like this in json as per below format

[{"GroupID":5},{"GroupID":47}]

What's the correct way to deserialize it?

I have the Group object:

 public class Group
    {
        [JsonProperty("GroupID")]
        public int Id { get; set; }
    }

I'm trying to deserialize by:

Group[] arr = JsonConvert.DeserializeObject<Group[]>(json).Select(j => j.Group).ToArray()

but I get a compiler error - probably due to a missing linking class:

'Group' does not contain a definition for 'Group' and no extension method 'Group' accepting a first argument of type 'Group' could be found (are you missing a using directive or an assembly reference?)

Yuval Itzchakov · Accepted Answer · 2015-01-22 16:55:56Z

3

This:

Select(j => j.Group)

Means: "select the property Group from all the elements in the array".

You don't have a property called Group, you have a class called Group.

All you need is:

Group[] arr = JsonConvert.DeserializeObject<Group[]>(json)

answered Jan 22, 2015 at 16:55

Yuval Itzchakov

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