Int to Enum or Enum to Int in C#

In previous article, I have mentioned Converting String to Enum OR Enum to String in C# but in this article, I have mentioned how we can convert Int to Enum in C# or Enum to int in C#, quickly and easily using console application example.

Using Typecasting (Int To Enum)

We can convert int to Enum using typecasting in C#, so here is the simple console application example to do it.

using System;
using System.IO;

namespace IntToEnum
{
    internal class Program
    {
        public enum Months
        {
            January,
            February,
            March,
            April,
            May,
            June,
            July,
            August,
            September,
            October,
            November,
            December
        }

        static void Main(string[] args)
        {
            int i = 2, j = 6, k = 11;
            Months month1, month2, month3;

            month1 = (Months)i; 
            month2 = (Months)j;
            month3 = (Months)k;

            Console.WriteLine(month1);//March
            Console.WriteLine(month2);//July
            Console.WriteLine(month3);//December
        }


    }
}

Output:

March
July
December

Using Enum.ToObject() Method (Int to Enum)

Instead of using above Typecasting method, we can also use Enum.ToObject method of C# to convert int to enum, considering above example, if we use typecasting, then we will have to update below code

            int i = 2, j = 6, k = 11;
            Months month1, month2, month3;

            month1 = (Months)Enum.ToObject(typeof(Months), i);
            month2 = (Months)Enum.ToObject(typeof(Months), j);
            month3 = (Months)Enum.ToObject(typeof(Months), k); ;

So complete console application code will look like below

using System;
using System.IO;

namespace IntToEnum
{
    internal class Program
    {
        public enum Months
        {
            January,
            February,
            March,
            April,
            May,
            June,
            July,
            August,
            September,
            October,
            November,
            December
        }

        static void Main(string[] args)
        {
            int i = 2, j = 6, k = 11;
            Months month1, month2, month3;

            month1 = (Months)Enum.ToObject(typeof(Months), i);
            month2 = (Months)Enum.ToObject(typeof(Months), j);
            month3 = (Months)Enum.ToObject(typeof(Months), k); ;

            Console.WriteLine(month1);//March
            Console.WriteLine(month2);//July
            Console.WriteLine(month3);//December

        }


    }
}

Output, is same as above.

March
July
December

Enum to Int in C#

If you want to convert Enum to Int or want to get int from Enum value, then we can again use typecasting in C# or use Enum.Parse or directlt Convert Enum to int using Convert.ToInt(), here is the sample console application.

using System;
using System.IO;

namespace EnumToInt
{
    internal class Program
    {
        public enum Months
        {
            January,
            February,
            March,
            April,
            May,
            June,
            July,
            August,
            September,
            October,
            November,
            December
        }

        static void Main(string[] args)
        {
            Enum en = Months.February;

            Console.WriteLine(Convert.ToInt32(en)); // 1
            Console.WriteLine((int)(object)en); // 1

            Console.WriteLine((int)Enum.Parse(en.GetType(), en.ToString())); //using Enum.Parse 
            Console.WriteLine((int)(object)en); 
        }


    }
}

That's it, hope it helps.

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