Question

I have a webservice that outputs a JSON string upon request.

Currently, I have a class set up to receive that looks like this

[DataContract]
public class user_new_register
{
    [DataMember(Name="ErrorStatus")]
    public string ErrorStatus{ get; set; }
    [DataMember(Name="ErrorMessages")]
    public string []ErrorMessages { get; set; }
    [DataMember(Name="UserID")]
    public int UserID { get; set; }
}

I pass the string to the server like this

var httpReq = (HttpWebRequest)HttpWebRequest.Create (new Uri (createUser));
httpReq.BeginGetResponse ((ar) => {
var request = (HttpWebRequest)ar.AsyncState;
using (var response = (HttpWebResponse)request.EndGetResponse (ar)) {
   var s = response.GetResponseStream ();

This works and “s” contains the response from the server ok. My problem is now how to deserialize the reply to the [DataContract] class.

I have tried the following, but it doesn’t work

user_new_register register = new user_new_register ();
var stream = new MemoryStream ();
var serializer = new DataContractJsonSerializer (typeof(json.user_new_register));
var httpReq = (HttpWebRequest)HttpWebRequest.Create (new Uri (createUser));
httpReq.BeginGetResponse ((ar) => {
    var request = (HttpWebRequest)ar.AsyncState;
using (var response = (HttpWebResponse)request.EndGetResponse (ar)) {
    var s = response.GetResponseStream ();
        stream = (JsonObject)JsonObject.Load (s);
        register = (user_new_register)serializer.ReadObject (s);

This compiles but crashes at the register = line

Any help or advice would be appreciated here 🙂

Thanks

Paul

Answer 1

I would recommend using json.net. There is a branched version for Mono that is about a year back (version 4.0), but I have used it on more than a handful of projects and it has been reliable.