// Entity Framework Classic

// Doc: https://entityframework-classic.net/audit

​

// @nuget: Z.EntityFramework.Classic

​

using System;

using System.Linq;

using System.Collections.Generic;

using System.Data.Entity;

using System.Text;

using Z.EntityFramework.Classic;

​

public class Program

{

    public class EntityContext : DbContext

    {

        public EntityContext() : base(FiddleHelper.GetConnectionStringSqlServer())

        {

            // Add your configuration here

            this.Configuration.Audit.AutoSaveAction = (context, auditing) => {

                foreach(var entry in auditing.EntriesXml)

                {

                    Log.AppendLine("EntitySetName: " + entry.EntitySetName);

                    Log.AppendLine("EntityTypeName: " + entry.EntityTypeName);

                    Log.AppendLine("State: " + entry.State);

                    Log.AppendLine("StateName: " + entry.StateName);

                    Log.AppendLine("CreatedBy: " + entry.CreatedBy);

                    Log.AppendLine("CreatedDate: " + entry.CreatedDate);

                    Log.AppendLine("XmlProperties: " + entry.XmlProperties);

                    Log.AppendLine("---");

                    Log.AppendLine("---");

                    Log.AppendLine("---");

                }               

            };

            this.Configuration.Audit.IsEnabled = true;

        }

        public DbSet<Customer> Customers { get; set; }

    }

    public static StringBuilder Log = new StringBuilder();

    public static void Main()

    {

        using (var context = new EntityContext())

        {

            context.Customers.Add(new Customer() { Name = "Customer_A", Description = "Description" });

            // Save changes with Audit Enabled

            context.SaveChanges();

        }

        // Display Audit Trail

        Console.WriteLine(Log.ToString());

    }

​

    public class Customer

    {

        public int CustomerID { get; set; }

        public string Name { get; set; }

        public string Description { get; set; }

    }

}