How to parse a polymorphic JSON array?

Question

I have a JSON file with an entry for individual users. Some users have a comment box stuck in the middle of their posts. I just want to parse the top-level elements (full name contributorName email)

using the parser Newtonsoft.JSON, but I can not get it to recognize individual objects. When I parse the entire string into one large object, I do not know how to iterate the individual.

This is how I tried to do this (property by property), but it did not work if they were out of order or had sub-properties. Instead, I have to put it in an object:

StreamReader re = File.OpenText("C:\\dropbox\\my dropbox\\clients\\towson\\english 317\\Ning Archive\\ning-members.json");
JsonTextReader reader = new JsonTextReader(re);
string ct = "";

try
{
    ct += "<table style='border:1px solid black'>";
    while (reader.Read())
    {
        if (reader.TokenType == JsonToken.PropertyName)
        {
            if (reader.Value.ToString() == "fullName")
            {
                reader.Read();
                ct += "\r\n\r\n<tr><td>" + reader.Value + "</td>";
            }
            if (reader.Value.ToString() == "contributorName")
            {
                reader.Read();
                ct += "<td>" + reader.Value + "</td></tr>";
            }
            if (reader.Value.ToString() == "email")
            {
                reader.Read();
                ct += "<td>" + reader.Value + "</td>";
            }
        }
    }       
}
catch { }

ct+="</table>";
namesText.Text = ct;

Please note that in the first entry there is a comment field that does not bother me, but interferes with when I try to parse as a stream.

[
{
    "createdDate": "2010-09-10T14:16:08.271Z",
    "fullName": "Lisa Meloncon",
    "gender": "f",
    "country": "US",
    "birthdate": "1969-05-14",
    "comments": [
        {
            "id": "6292914:Comment:272",
            "contributorName": "0upfj0fd33932",
            "description": "Thanks for joining! I'm working up a schedule for the students a bit late so I can assess some of their early writing (including the first assignment, a general evaluation of business writing skills) and determine a course that will address their needs. I plan to make liberal use of technology this semester, with a Screencasting assignment, some intermediate Word formatting drills, and various other activities.",
            "createdDate": "2010-09-10T18:07:38.272Z"
        }
    ],
    "email": "[e-mail]",
    "profilePhoto": "http://api.ning.com:80/files/251IcCtIBC3dGALHpG3ruYfg0Ip*EFJApPyMVGkiVArSUEvF*dK8A5grvPvl8eC7i7H0grhRH4pakLc9jSOww2GpU2OTq2nq/626617250.png?crop=1%3A1",
    "level": "member",
    "state": "active",
    "contributorName": "2z42css3dgvoi"
},
{
    "createdDate": "2010-09-08T02:57:00.225Z",
    "fullName": "Robert Calabrese",
    "gender": "m",
    "location": "Baltimore, MD",
    "country": "US",
    "zip": "21284",
    "birthdate": "1989-09-29",
    "email": "[e-mail]",
    "profilePhoto": "http://api.ning.com:80/files/251IcCtIBC3dGALHpG3ruYfg0Ip*EFJApPyMVGkiVArSUEvF*dK8A5grvPvl8eC7i7H0grhRH4pakLc9jSOww2GpU2OTq2nq/626617250.png?crop=1%3A1",
    "level": "member",
    "state": "active",
    "contributorName": "199ru4hzwc4n4"
},
{
    "createdDate": "2010-09-04T22:36:51.158Z",
    "fullName": "Regis Bamba",
    "gender": "m",
    "location": "Baltimore, MD",
    "country": "US",
    "zip": "21210",
    "birthdate": "1986-09-29",
    "email": "rbamba2xxx.edu",
    "profilePhoto": "http://api.ning.com:80/files/251IcCtIBC3dGALHpG3ruYfg0Ip*EFJApPyMVGkiVArSUEvF*dK8A5grvPvl8eC7i7H0grhRH4pakLc9jSOww2GpU2OTq2nq/626617250.png?crop=1%3A1",
    "level": "member",
    "state": "active",
    "contributorName": "2seadgzt89n6x"
},

Answer 1

- :

JArray root = JArray.Load(reader);
foreach(JObject o in root)
{
    ct += "\r\n\r\n<tr><td>" + (string)o["fullName"] + "</td>";
    ct += "<td>" + (string)o["contributorName"] + "</td>";
    ct += "<td>" + (string)o["email"] + "</td>";
}

JToken, JObject.Item.

StringBuilder, .