How to pass string variables to JObject C# – Could not load file or assembly 'System.Text.Json

Good day, I need to assign variables to JObjet:

 JObject json = JObject.Parse(@"{
RequestData: {
  AccountCredential: {
    AccountLink: 'dFyRCVYNM0aGb1LSR/0B8e+eSVr1Zf1xj9YHmMVoiZWk28XtWEyIxEbGXnr1EdvS+QBPzjweau7tbf5QlDv97IQ2jwfUB=='
  },
  AccountNumber: '000011887755',
  BookingDateStart: '2022-07',
  BookingDateEnd: '2022-07'
}  }");

I want to pass values ​​to AccountLink, AccountNumber, BookingDateStart, BookingDateEnd. If you notice, I set the values ​​to hard, but these change, where I should use it by passing the parameters.

I have tried to use the JsonSerializerOptions, but I get error Could not load file or assembly ‘System.Text.Json. I want to be able to use it in an asynchronous task.

If anyone has any ideas, your help is appreciated.

Greetings

>Solution :

There are two major C# JSON libraries: Newtonsoft.Json and System.Text.Json. JObject is a class from the former, and JsonSerializerOptions is a class from the latter. You can’t just mix them together. If you want to modify Newtonsoft.Json serialization, you need to look up how to do that in Netwonsoft.Json.

That having been said, you don’t need a serializer for what you are trying to do. Creating a JObject from variable data is simple in Netwonsoft.Json. Your code would look similar to that (fiddle):

    var json = new JObject(
        new JProperty("RequestData",
            new JObject(
                new JProperty("AccountCredential", 
                    new JObject(
                        new JProperty("AccountLink", "...")
                    )
                ),
                new JProperty("AccountNumber", "..."),
                new JProperty("BookingDateStart", "..."),
                new JProperty("BookingDateEnd", "...")
            )
        )
    );

Just replace "…" with the value you want to fill your JObject with.