Access the data within the nested JSON object

As I attempt to retrieve a value from a deeply nested Json object, I encounter a Parse error:

The Json data I'm working with:

{
    "MessageId": "f6774927-37cf-4608-b985-14a7d86a38f9",
    "Time": "2017-04-06T16:28:38.0719933+02:00",
    
    "Data":
    {
        "ID":
        {
            "value": "0008044834"
        },
        "Carrier":
        {
            "value": 0
        },
        "Tool":
        {
            "value": 0
        }
    }
}
          var myJsonString = File.ReadAllText(_currentDictory.FullName + @"\test\" + completeFilename);


            var myJObject = JObject.Parse(myJsonString);


            var serial = myJObject.SelectToken("Data.ID").Value<String>();

System.InvalidCastException
  HResult=0x80004002
  Message=Cannot cast Newtonsoft.Json.Linq.JObject to Newtonsoft.Json.Linq.JToken.
  Source=Newtonsoft.Json

While I can successfully retrieve other values like "MessageID", attempting to retrieve "Data.XYZ" triggers the aforementioned error.

Answer â„–1

In order to retrieve the value from your json path, make sure to include the value property:

var serial = myJObject.SelectToken("Data.ID.value").Value<String>();

The current path you have selected returns a JObject with a single property called value, which cannot be directly converted to a string.

Answer â„–2

MessageId is a type of data that is stored as a string, allowing for direct reading of its value. Data, on the other hand, consists of objects enclosed in curly braces {}. This requires a specific method to access the values within.

var serial = myJObject.SelectToken("Data.ID.value").Value<String>();

To learn more about handling similar JSON data retrieval issues, refer to: Getting 'Cannot cast Newtonsoft.Json.Linq.JObject to Newtonsoft.Json.Linq.JToken' when retrieving items from JSON

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