How to parse nested JSON string using .NET

Question

I'm trying to parse a nested JSON string returned from the GCM (Google Could Messaging) server using VB.NET. The JSON string looks like this:

{ "multicast_id": 216,
  "success": 3,
  "failure": 3,
  "canonical_ids": 1,
  "results": [
    { "message_id": "1:0408" },
    { "error": "Unavailable" },
    { "error": "InvalidRegistration" },
    { "message_id": "1:1516" },
    { "message_id": "1:2342", "registration_id": "32" },
    { "error": "NotRegistered"}
  ]
}

I would like to get the results array in the above string.

I found the following example helpful, example but it does not show how to get to the nested parts, specifically message_id, error and registration_id inside the results array.

Thanks

I4V · Accepted Answer · 2013-05-18 22:22:44Z

4

I'll give an answer using c# and Json.net

var jobj = JsonConvert.DeserializeObject<Response>(json);

You can also use JavaScriptSerializer

var jobj2 = new JavaScriptSerializer().Deserialize<Response>(json);

public class Result
{
    public string message_id { get; set; }
    public string error { get; set; }
    public string registration_id { get; set; }
}

public class Response
{
    public int multicast_id { get; set; }
    public int success { get; set; }
    public int failure { get; set; }
    public int canonical_ids { get; set; }
    public List<Result> results { get; set; }
}

answered May 18, 2013 at 22:22

I4V

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2 Comments

Netricity Over a year ago

@KashifB use Telerik's Code Converter to translate the C# to VB.NET

katit Over a year ago

Multicast Id and others should be long - int is too small for what google sends back

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