Parsing Multidimensional JSON Array with Newtonsoft Json.NET

Question

I have Json returning as the following:

[{\"CreatedBy\":\"GIS_DB\",\"CreatedDate\":\"3/8/2012 10:44:00 AM\",\"Id\":39,\"ModifiedBy\":\"\",\"ModifiedDate

Answer 1

Instead of declaring a lot of classes, I would parse the json string as follows

JArray jArr = (JArray)JsonConvert.DeserializeObject(jsonstr);
foreach (var item in jArr)
{
    foreach(var subitem in item["TrailCoordinates"])
    {
        Console.WriteLine(subitem["Longitude"] + " " + subitem["Latitude"]);
    }
}

If monotouch supports dynamic you can also write

dynamic jArr2 = JsonConvert.DeserializeObject(jsonstr);
foreach (dynamic item in jArr2)
{
    foreach (var subitem in item.TrailCoordinates)
    {
        Console.WriteLine(subitem.Longitude + " " + subitem.Latitude);
    }
}

You can even use Linq

JArray jArr = (JArray)JsonConvert.DeserializeObject(jsonstr);
var coords = jArr
            .Select(x => x["TrailCoordinates"])
            .SelectMany(x=>x)
            .Where(x => x["TrailId"].ToString() == "40")
            .Select(x => new { Lat = double.Parse(x["Latitude"].ToString()), Lon=double.Parse(x["Longitude"].ToString()) })
            .ToArray();