How to pass list of objects in json object - json

Question

Hi I am developing small application in which I am trying to pass some data in http post method. So I want to send my data like this form
"storeid": "151",
"floordata": {
"entry": [
10,
15
],
"exit": [
10,
15
],
"section": [
{
"id": "0",
"sectionname": "ABC",
"category": "office",
"boundary": [
[
85,
258
],
[
85,
298
],
[
125,
298
],
[
125,
258
],
[
85,
258
]
"description": "Mobile based company"
}
]
},
"category": null,
"description": null
so my problem is regarding section parameter. I am doing this for section parameter.
String section = "section=";
// Problem for me is here ...
JSONArray sections = new JSONArray();
List<List<Float>> sectionCords = new ArrayList<List<Float>>();
List<Float> sectionCordData = new ArrayList<Float>();
sectionCordData.add(0.0f);
sectionCordData.add(0.1f);
List<Float> sectionCordData1 = new ArrayList<Float>();
sectionCordData1.add(0.0f);
sectionCordData1.add(0.1f);
sectionCords.add(sectionCordData);
sectionCords.add(sectionCordData1);
JSONObject sectionObj = new JSONObject();
//List<JSONObject> cordList = new ArrayList<JSONObject>();
try {
sectionObj.put("category", "office");
sectionObj.put("description", "Mobile based company");
sectionObj.put("sectionname", "mobiotics");
sectionObj.put("id", 0);
sectionObj.put("boundary", sectionCords); // Check Here i am sending as list ...
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
sections.put(sectionObj);
section += sections;
section +="&";
But In actual it my section boundary parameter going as string instead of list. Like this
boundary=[
[
0.0,
0.1
],
[
0.0,
0.1
]
],storeid=156&floor=2&section=[
{
"id": 0,
"sectionname": "mobiotics",
"category": "office",
"boundary": "[[0.0, 0.1], [0.0, 0.1]]", // See here is my problem ...
"description": "Mobile based company"
}
],entry=[
10,
15
],exit=[
10,
15
]
How to send it as list instead of string. Need Help. Thank you.

Answer 1

Define sectionChords, and sectionCordData* as JSONArray instead of List:
JSONArray sectionChords = new JSONArray();
JSONArray sectionCordData = new JSONArray();
sectionCordData.put(0.0f);
sectionCordData.put(0.1f);
JSONArray sectionCordData1 = new JSONArray();
sectionCordData1.put(0.0f);
sectionCordData1.put(0.1f);
sectionCords.put(sectionCordData);
sectionCords.put(sectionCordData1);

Answer 2

It must do what you want according to docs.
Put a key/value pair in the JSONObject, where the value will be a JSONArray which is produced from a Collection.
But it puts JSON representation of your object as String. So you should use either JSONArrays or Java objects. You should not mix them.

Answer 3

controller :
public JsonResult Index()
{
List<Location> location = (from a in db.Locations select a).ToList();
return Json(location, JsonRequestBehavior.AllowGet);
}