How to set json field name from property value in run-time .net-CodePudding

How to serialize an object to json through setting json field name from object's property value?

I am using NewtonsoftJson as a json library.

public class Data
{
  public string Question {get;set;} = "Test Question?";
  public string Answer {get;set;} = "5";
}

expected json output:

{
  "Test Question?": {
    "Answer": "5"
  }
}

CodePudding user response：

You can use a dictionary for that:

JsonSerializer.Serialize(
    new Dictionary<string, object>
    {
        {
            data.Question, new
            {
                data.Answer
            }
        }
    });

or if you are using Newtonsoft, you can use the JsonConvert.SerializeObject method for serialization, with the same input.

CodePudding user response：

Here is an example of how you could set the field name of a JSON object in .NET using the dynamic type:

// Define the property value and field name
string propertyValue = "fieldValue";
string fieldName = "fieldName";

// Create a dynamic object
dynamic obj = new ExpandoObject();

// Set the value of the field using the property value as the field name
obj[propertyValue] = "some value";

// Serialize the object to JSON
string json = JsonConvert.SerializeObject(obj);

// The resulting JSON will be {"fieldName": "some value"}

In the example above, we create a dynamic object and use the [propertyValue] syntax to set the value of a field using the value of the propertyValue variable as the field name. We then use the JsonConvert.SerializeObject method to serialize the object to a JSON string.

CodePudding user response：

Just for a record

var data = new Data();

string json = new JObject { [data.Question] = new JObject { ["Answer"] = data.Answer } }.ToString();