How to validate JSON objects using Newton JSON and C#

Question

I am new to Tests in Visual Studio , normally I always used proper test tool in order to validate the json file and its data

I am stuck how to validate JSON objects , data inside in the JSON File

through following code I am Reading the JSON file , further i would like to validate the JSON objects

here is my readJSON method which reads the file but now I would like to either check if it contains any given specific value let say I would like to check if it contains the "Details" and its value "XYZG" or not

I tried to convert JSON into ToString() and then user .count method but it gives me the value 0 in output so I removed that ToString() block from the code

JSON Data

{
    "Details":"XYZG",
    "City":"Tokyo",
    "Id":"ATOOO",
    "Name":"Johny"
}

read json method

public string ReadMyJsonFile(String FilePath)
        {
            string storeValue = "";
            using (StreamReader readerobject = new StreamReader(FilePath))
            {
                string jsonString = readerobject.ReadToEnd();

            }
            return storeValue;

        }

TestMethod

public async TaskTest()
        {
          var json = ReadMyJsonFile(@"FilePath/Test.json");
            var testobject = JsonConvert.DeserializeObject<JObject>(json);
            Console.WriteLine(testobject);

            try
            {
                if (testobject.SelectTokens("$..Id").Any(t => t.Value<string>() == "$..Id"))
                {
                    Console.WriteLine("\n \n value exist");
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine("error keyword");
            }

        }

´´´

I am kinda stuck with the validation part of my json data

Answer 1

you better print a json string, not a JObject

     try
    {
        var json = ReadMyJsonFile(@"FilePath/Test.json");

        if (!string.IsNullOrEmpty(json))
        {
            Console.WriteLine("json file exists \n");
            Console.WriteLine(json);
        }
        else
        {
            Console.WriteLine("json file not exists \n");
            return;
        }

        var testObject = JObject.Parse(json);

        if (!string.IsNullOrEmpty((string)testObject["Id"]))
        {
            Console.WriteLine("\n Id value exists");
            Console.WriteLine((string)testObject["Id"]);
        }
        else
            Console.WriteLine("\n Id value doesnt exist");
    }
    catch (Exception ex)
    {
        Console.WriteLine("error "+ex.Message);
    }