Parsing an Array of Json into a C# Class

Question

Here is my code:

Encoding enc = System.Text.Encoding.GetEncoding(1252);
StreamReader loResponseStream = new StreamReader(resp.GetResponseStream(), enc);
JsonSerializer serializer = new JsonSerializer();
JsonTextReader jsreader = new JsonTextReader(loResponseStream);
results = (mHealthData)serializer.Deserialize(jsreader, typeof(mHealthData)); ***
loResponseStream.Close();

public class mHealthData
{ // Class for the Mhealth Data
    public class RootObject
    {
        public string source { get; set; }
        public string name { get; set; }
        public string type { get; set; }
        public string unit { get; set; }
        public double value { get; set; }
        public string timestamp { get; set; }
    }
}   

This is the error I receive On the line marked with a **:

Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'MHealthPlugin.mHealthData' because the type requires a JSON object (e.g. {"name":"value"}) to deserialize correctly. To fix this error either change the JSON to a JSON object (e.g. {"name":"value"}) or change the deserialized type to an array or a type that implements a collection interface (e.g. ICollection, IList) like List<T> that can be deserialized from a JSON array. JsonArrayAttribute can also be added to the type to force it to deserialize from a JSON array.

I have no clue how to fix this. I've tried putting List<mHealthData> practically everywhere in the code and it doesn't help. The other rest Calls I do work fine. For reference, here is an example of what the JSON I'm trying to parse looks like:

[{"source":"hi","name":"G","type":"number","unit":null,"value":126,"timestamp":"1974-07-27T09:35:12Z"},{"source":"hi","name":"G","type":"number","unit":null,"value":120,"timestamp":"1974-07-27T09:35:12Z"}]

Answer 1

Your mHealthData class doesn't have anything in it, except a nested class. Take a step back and see how your data is supposed to be defined.

It looks like you want a RootObject class. In that case, the class should be:

public class RootObject
{
    public string source { get; set; }
    public string name { get; set; }
    public string type { get; set; }
    public string unit { get; set; }
    public double value { get; set; }
    public string timestamp { get; set; }
}

Then when you deserialize, you'll end up with an object of type RootObject[] - your JSON is simply an array, not an object containing an array.