Json.NET: Deserilization with Double Quotes

Question

I am trying to deserialize a json string received as a response from the service. The client is Windows Phone 7, in C#. I am using Json .NET - James Newton-King deserializor to directly convert the Json string to objects. But sometimes the Json string contains some comments information with double quotes (") in them and the deserializer fails and throws an error. Looks like this is an invalid Json string according to Jsonlint.

{
    "Name": "A1",
    "Description": "description of the "object" A1"
}

How to handle such Json String. If it is (\"), then it works. But I cannot replace all (") with (\") as there might be double quotes in other part of the json string. Is there any decode function of Json .Net?

Answer 1

You can improving this.

    static private T CleanJson<T>(string jsonData)
    {
        var json = jsonData.Replace("\t", "").Replace("\r\n", "");
        var loop = true;
        do
        {
            try
            {
                var m = JsonConvert.DeserializeObject<T>(json);
                loop = false;
            }
            catch (JsonReaderException ex)
            {
                var position = ex.LinePosition;
                var invalidChar = json.Substring(position - 2, 2);
                invalidChar = invalidChar.Replace("\"", "'");
                json = $"{json.Substring(0, position -1)}{invalidChar}{json.Substring(position)}";
            }
        } while (loop);
        return JsonConvert.DeserializeObject<T>(json);
    }

Example;

var item = CleanJson<ModelItem>(jsonString);

Answer 2

It looks like HttpUtility.JavaScriptStringEncode might solve your issue.

HttpUtility.JavaScriptStringEncode(JsonConvert.SerializeObject(yourObject))