c# - Populating Lists from json file -

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• serialize , deserialize json , json array in unity 4 answers

i'm trying populate 3 lists according json file.

the goal load data json file, assign lists can add/modify values , re-save them json file.

however there seems problem line

level.add(new level(i, (string)levelsjson[i]["name"]), props ); 

specifically props.

i appreciate solution on how populate levels list , modify!

this json structure

[   {     "id": 0,     "name": "greatest level",     "props": [       {         "name": "stone",         "position": [ 4, 2 ]       },       {         "name": "tree",         "position": [ 1, 7 ]       }     ]   },   {     "id": 1,     "name": "shitty level",     "props": [       {         "name": "stone",         "position": [ 2, -5 ]       },       {         "name": "tree",         "position": [ 15, 2 ]       }     ]   } ] 

this entire code

using system.collections; using system.collections.generic; using unityengine; using system.io; using litjson;  public class json : monobehaviour {      private list<levels> levels = new list<levels>();     private jsondata levelsjson;      void start () {         loadlevels();     }      void loadlevels() {         levelsjson = jsonmapper.toobject(file.readalltext(application.datapath + "/streamingassets/levels.json"));          //this im trying populate lists         for(int = 0; < levelsjson.count; i++) {         list<level> level = new list<level>();         list<prop> props = new list<prop>();         for(int prop = 0; prop < levelsjson[i]["props"].count; prop++) {             props.add(new prop((string)levelsjson[i]["props"]["name"], new int[] { (int)levelsjson[i]["props"]["position"][0], (int)levelsjson[i]["props"]["position"][1]}));         }         level.add(new level(i, (string)levelsjson[i]["name"]), props );     }  }  public class levels {     public level[] levels;      public levels(level[] l) {         levels = l;     } }  public class level {     public int id;     public string name;     public prop[] props;      public level(int i, string n, prop[] p) {         id = i;         name = n;         props = p;     } }  public class prop {     public string name;     public int[] position;      public prop(string n, int[] p) {         name = n;         position = p;     } } 

one issue see you're initializing level list inside of initial loop populate level list. cause level variable re-initialized new empty list @ start of each iteration.

try moving line: list<level> level = new list<level>();

before line: for(int = 0; < levelsjson.count; i++) {