Manually Encryption-Decryption customization in MVC || RAJESH GAMI

ENC – Encryption ID

using System;

using System.Data.Entity;

namespace MyProject.Models

{

    public class enc

    {

        public static string Encrypt(int value)

        {

            string str = Convert.ToBase64String(BitConverter.GetBytes(value));

            str = str.Replace("==", "");

            str = str.Replace("+", "#");

            str = str.Replace("/", "@");

            return GetLetter() + str + GetLetter();

            //return Convert.ToBase64String(BitConverter.GetBytes(value)).Replace("==", "");

        }

        public static int Decrypt(string value)

        {

            value = value.Replace("@", "/");

            value = value.Replace("#", "+");

            if (value.Length != 6)

                throw new ArgumentException("Invalid length.");

            return BitConverter.ToInt32(Convert.FromBase64String(value + "=="), 0);

        }

        static Random _random = new Random();

        public static char GetLetter()

        {

            // This method returns a random lowercase letter.

            // ... Between 'a' and 'z' inclusize.

            int num = _random.Next(0, 26); // Zero to 25

            char let = (char)('A' + num);

            return let;

        }

        public class encContext : DbContext

        {

            public encContext()

                : base("ConString_name")

            {

            }

            public DbSet<enc> enc { get; set; }

        }

    }

}