how to set the value of a json path using json.net

Question

I am trying to set an arbitrary path in a JSON structure and I am having difficulty figuring out how to do a simple set value...

What I would like is some method lik

Answer 1

    public string SetPreference(string username, string path, string value)
    {
        if (!value.StartsWith("[") && !value.StartsWith("{"))
            value = string.Format("\"{0}\"", value);

        var val = JObject.Parse(string.Format("{{\"x\":{0}}}", value)).SelectToken("x");

        var prefs = GetPreferences(username);

        var jprefs = JObject.Parse(prefs ?? @"{}");

        var token = jprefs.SelectToken(path) as JValue;

        if (token == null)
        {
            dynamic jpart = jprefs;

            foreach (var part in path.Split('.'))
            {
                if (jpart[part] == null)
                    jpart.Add(new JProperty(part, new JObject()));

                jpart = jpart[part];
            }

            jpart.Replace(val);
        }
        else
            token.Replace(val);

        SetPreferences(username, jprefs.ToString());

        return jprefs.SelectToken(path).ToString();
    }