InterceptingWithDuckTyping.cs

InterceptingWithDuckTyping.cs

namespace DynamicProxy.Console
{
    class Program
    {
        static void Main()
        {         
            var myContext = new MyContext();
            //create entries in DbContext
            Customer entry = myContext.Customers.FirstOrDefault();

            //MyContext doesn't implement IDbContext, but contains the methods of IDbContext
            //so acts like a IDbContext
            IDbContext duck = Impromptu.ActLike<IDbContext>(myContext);

            IDbContext proxy = ObjectProxyFactory.CreateUsingActions(duck,
                pre =>
                {
                    System.Console.WriteLine("Entering \"{0}\" method from {1}", pre.CallCtx.MethodName, pre.Target);
                },
                post =>
                {
                    System.Console.WriteLine("Exiting {0} method from {1}", post.CallCtx.MethodName, post.Target);
                }, null, false, e => e.Entry(null));

            var dbEntry = proxy.Entry(entry);
            System.Console.WriteLine(dbEntry.Entity.ToString());
            System.Console.ReadKey();
        }
}

/*
Output of the console will be:

Entering "Entry" method from DynamicProxy.Console.Model.MyContext
Exiting Entry method from DynamicProxy.Console.Model.MyContext
System.Data.Entity.Infrastructure.DbEntityEntry

*/

using System.Data.Entity.Infrastructure;

namespace DynamicProxy.Console.Model
{
    //DbContext from EntityFramework contains a method called Entry
    public interface IDbContext
    {
        DbEntityEntry Entry(object entry);
    }
}

using System.Data.Entity;
using DynamicProxy.Console.Infra;

namespace DynamicProxy.Console.Model
{    
    public class MyContext : DbContext
    {
        public MyContext()
            : base("MyContext")
        {
            Configuration.AutoDetectChangesEnabled = false;
            Configuration.LazyLoadingEnabled = false;
            Configuration.ProxyCreationEnabled = false;
            Configuration.ValidateOnSaveEnabled = false;
        }

        public IDbSet<Customer> Customers { get; set; }
        public IDbSet<Order> Orders { get; set; }
        public IDbSet<CustomerOrder> CustomerOrders { get; set; }


        static MyContext()
        {
            //Database.SetInitializer(new DropCreateDatabaseAlways<MyContext>());
        }
    }
}