Reputation: 677
I have a JSON file that looks like the one beneath. The "Questions" node contains a list of arrays. Each one of these arrays contains 5 strings. One questions, 4 answers. I'm trying to read the information using Unity. The built in JsonUtility apparently can't handle arrays in nested JSON files very well, so I tried using SimpleJSON instead. It works great for creating a file, however I do not need that functionality.
I need to extract all the information from my JSON file. Preferably in a variable like List<List<string>>
, or Dictionary<string,List<string>>
. The file was created like so:
public void SerializeData()
{
JSONObject questionJson1 = new JSONObject();
JSONObject questionJson = new JSONObject();
for (int i = 0; i < 5; i++)
{
JSONArray question = new JSONArray();
question.Add("This is the question string itself " + i);
question.Add("Correct answer! " + i);
question.Add("Answer 1 " + i);
question.Add("Answer 2 " + i);
question.Add("Answer 3 " + i);
questionJson1.Add(i+"", question);
}
questionJson.Add("Questions",questionJson1);
File.WriteAllText(path, questionJson.ToString());
}
I have tried all sorts of different foreach loops to try and extract the data, but it has not worked so far. Here is one of my attemps:
public void DeserializeData()
{
string jsonString = File.ReadAllText(path);
JSONObject questions = (JSONObject)JSON.Parse(jsonString);
print("UNDER HERE");
foreach(JSONArray s in questions.AsArray[0])
{
foreach(KeyValuePair<string, SimpleJSON.JSONNode> t in s)
{
print(t.Key + " " + t.Value);
}
}
}
If anyone has any experience with reading data from similar Json files, please let me know! I'm open to using other tools than SimpleJSON!
{
"Questions":{
"0":[
"This is the question string itself 0",
"Correct answer! 0",
"Answer 1 0",
"Answer 2 0",
"Answer 3 0"
],
"1":[
"This is the question string itself 1",
"Correct answer! 1",
"Answer 1 1",
"Answer 2 1",
"Answer 3 1"
],
"2":[
"This is the question string itself 2",
"Correct answer! 2",
"Answer 1 2",
"Answer 2 2",
"Answer 3 2"
],
"3":[
"This is the question string itself 3",
"Correct answer! 3",
"Answer 1 3",
"Answer 2 3",
"Answer 3 3"
],
"4":[
"This is the question string itself 4",
"Correct answer! 4",
"Answer 1 4",
"Answer 2 4",
"Answer 3 4"
]
}
}
Upvotes: 0
Views: 820
Reputation: 8311
Try this code using the https://www.newtonsoft.com/json library for .NET:
using Newtonsoft.Json.Linq;
string json =
"{\r\n\r\n \"Questions\":{\r\n\r\n \"0\":[\r\n\r\n \"This is the question string itself 0\",\r\n \"Correct answer! 0\",\r\n \"Answer 1 0\",\r\n \"Answer 2 0\",\r\n \"Answer 3 0\"\r\n ],\r\n \"1\":[\r\n\r\n \"This is the question string itself 1\",\r\n \"Correct answer! 1\",\r\n \"Answer 1 1\",\r\n \"Answer 2 1\",\r\n \"Answer 3 1 \"\r\n ],\r\n \"2\":[\r\n\r\n \"This is the question string itself 2\",\r\n \"Correct answer! 2\",\r\n \"Answer 1 2\",\r\n \"Answer 2 2\",\r\n \"Answer 3 2 \"\r\n ],\r\n \"3\":[\r\n\r\n \"This is the question string itself 1\",\r\n \"Correct answer! 1\",\r\n \"Answer 1 3\",\r\n \"Answer 2 3\",\r\n \"Answer 3 3\"\r\n ],\r\n \"4\":[\r\n\r\n \"This is the question string itself 1\",\r\n \"Correct answer! 1\",\r\n \"Answer 1 1\",\r\n \"Answer 2 1\",\r\n \"Answer 3 4\"\r\n ]\r\n }\r\n}";
JObject jo = JObject.Parse(json);
Dictionary<string, List<string>> values = jo.SelectToken("Questions", false).ToObject<Dictionary<string, List<string>>>();
//This will run 5 times as per your JSON structure
foreach (var kv in values)
{
Console.WriteLine(kv.Value[0]); //Your question
Console.WriteLine(kv.Value[1]); //Correct Answer
Console.WriteLine(kv.Value[2]); //Answer 1
Console.WriteLine(kv.Value[3]); //Answer 2
Console.WriteLine(kv.Value[4]); //Answer 3
}
Upvotes: 2