Unity for each JSONnode in JSONObject

Question

I am working with Unity and Socket.IO and a NodeJS server when a player joins i need to send him the info abbout the other players to add them to his game. The server sends this json string:

{  
   "players":{  
      "/#3vd98L1t96vgMwRsAAAB":{  
         "name":"Player #2",
         "x":0,
         "y":0
      },
      "/#RaLyZw7Rnp94nDXkAAAF":{  
         "name":"Player #6",
         "x":0,
         "y":0
      }
   }
}

But i can't find out how to forloop this in unity? I thought making a object out of it would work so this is what i came up with:

JSONObject players = new JSONObject(e.data.GetField("players").ToString());

But how can i make a foreach loop out of it?

I am not getting the question here, can you give the sample output — Devank, Apr 30 '16 at 17:34
@Devank i need a for each loop to insert all players so a for each loop that loops through: "/#3vd98L1t96vgMwRsAAAB" and through: "/#RaLyZw7Rnp94nDXkAAAF" The sample output is just the string as the example above: {"players":{"/#z91LtpNg70y3GiUDAAAA":{"name":"Player #1","x":0,"y":0}}} — Menno van Hout, Apr 30 '16 at 17:37

dbc · Accepted Answer · 2016-04-30T18:07:03.963

Assuming that your e.data is a JSONObject created from the JSON you show, you can do:

var players = e.data.GetField("players");

for(int i = 0; i < players.list.Count; i++)
{
    string playerKey = (string)players.keys[i];
    JSONObject playerData = (JSONObject)players.list[i];
    // Process the player key and data as you need.
}

For the relevant docs see JSONObject: Decoding.

For convenience, you might want to encapsulate this logic in an extension method for later re-use:

public static class JSONObjectExtensions
{
    public static IEnumerable<KeyValuePair<string, JSONObject>> NameValuePairs(this JSONObject obj)
    {
        if (obj == null)
            throw new ArgumentNullException();
        if (obj.type != JSONObject.Type.OBJECT)
            throw new InvalidOperationException(string.Format("Incoming object type {0} is not JSONObject.Type.OBJECT.", obj.type));
        for (int i = 0; i < obj.list.Count; i++)
        {
            string key = (string)obj.keys[i];
            JSONObject j = (JSONObject)obj.list[i];
            yield return new KeyValuePair<string, JSONObject>(key, j);
        }
    }
}

Then you can do

foreach (var pair in players.NameValuePairs())
{
    // Process the player key and data as you need.
}

Thank you for your fast and easy solution! it fits perfect and it does the job! thank you so much! — Menno van Hout, Apr 30 '16 at 18:00

score 0 · Answer 2 · edited May 23 '17 at 12:23

You did not mention the library you are using. Unity added native Jason serialzer in version 5.3.

Convert Class to Json string:

string jsonString = JsonUtility.ToJson(className);

Convert Json string to class:

ClassName serializedPlayer = new ClassName();
serializedPlayer = JsonUtility.FromJson<ClassName>(jsonString);

The answer I provided here describes how to use array json. It's a long process to be reposted but it is what you are looking for. You should read the second solution that says "2. MULTIPLE DATA(ARRAY JSON)."

Unity for each JSONnode in JSONObject

2 Answers2