I am facing an issue by converting JSON to c# using JSON converter

Question

I am facing an issue by converting JSON to c# using JSON converter. where I have a field decimal value is 10000 when converting the value is 10000.0 — how to restrict that?

using System;
using Newtonsoft.Json;


public class Program
{
    public class Employee  
{  
    public int ID { get; set; }  
    public string Name { get; set; }  
    public decimal? Salary { get; set; }  
}  
    public static void Main()
    {
         // Serializaion  
    Employee empObj = new Employee();  
    empObj.ID = 1;  
    empObj.Name = "Manas";  
    empObj.Salary = 10000;

    // Convert Employee object to JOSN string format   
    string jsonData = JsonConvert.SerializeObject(empObj);  

    Console.WriteLine(jsonData); 
    }
}

Actual Result:

{"ID":1,"Name":"Manas","Salary":10000.0}

Expected Result:

{"ID":1,"Name":"Manas","Salary":10000}

I would say 10000.0 is the expected result for a decimal. When you want to have 10000 change decimal to int. — user743414, May 22 '19 at 06:37
Please elaborate what you mean by "need decimal"? Give some example. — Sateesh Pagolu, May 22 '19 at 06:44
What is wrong with `10000.0`? Many parsers will convert `10000` to a `10000I` rather than `10000m` or `10000d`. — Aron, May 22 '19 at 06:48
When I give salary is 10000 it will convert 10000 and I will give 10000.50 it will return 10000.50 — Ramesh, May 22 '19 at 06:49
This is not answer for your question but may be helpfull: https://tgebarowski.github.io/2017/07/13/json-and-decimal-values/ — Marcin, May 22 '19 at 06:50
Looks like there is an answer to your question here: https://stackoverflow.com/questions/34568963/how-can-i-force-a-minimum-number-of-decimal-places-in-json-net — Ilya Chernomordik, May 22 '19 at 07:01

score 1 · Answer 1 · edited May 22 '19 at 07:08

Try using a custom converter, see the snippet below.

using System;
using System.Globalization;
using Newtonsoft.Json;


public class Program
{
    public class Employee
    {
        public int ID { get; set; }
        public string Name { get; set; }

        [JsonConverter(typeof(CustomDecimalConverter))]
        public decimal? Salary { get; set; }
    }
    public static void Main()
    {
        // Serializaion  
        var empObj = new Employee { ID = 1, Name = "Manas", Salary = 10000 };

        // Convert Employee object to JOSN string format   
        var jsonData = JsonConvert.SerializeObject(empObj);

        Console.WriteLine(jsonData);
        Console.ReadLine();
    }

    public class CustomDecimalConverter : JsonConverter    
    {    
        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)    
        {    
            writer.WriteValue(((decimal)value).ToString(CultureInfo.InvariantCulture));    
        }

        public override bool CanRead => false;

        public override bool CanConvert(Type objectType)    
        {    
            return objectType == typeof(decimal) || objectType == typeof(decimal?);    
        }

        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)    
        {    
            throw new NotImplementedException();    
        }       
    }
}

I am facing an issue by converting JSON to c# using JSON converter

1 Answers1