<register type="UBICACION DE LA INTERFAZ, NOMBRE PROYECTO " mapTo="UBICACION CLASE CONCRETA, NOMBRE PROYECTO/>

<?xml version="1.0" encoding="utf-8"?>
<unity xmlns="http://schemas.microsoft.com/practices/2010/unity">
  <container>    
    <register type="MvpPractica.Interfaces.IPresenterTabla, MvpPractica" mapTo="MvpPractica.Presenters.AR.PresenterTablaAR, MvpPractica"/>
    <!-- <register type="MvpPractica.Interfaces.IPresenterTabla, MvpPractica" mapTo="MvpPractica.Presenters.US.PresenterTablaUS, MvpPractica"/> -->
  </container>
</unity>

  <configSections>
    	<section name="unity" type="Microsoft.Practices.Unity.Configuration.UnityConfigurationSection, Unity.Configuration" />    
  </configSections>
  <unity configSource="Configuration\unity.config" />

using DotNetNuke.Web.Api;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using Unity;
using MvpPractica.Interfaces;
using Microsoft.Practices.Unity.Configuration;

namespace MvpPractica
{     
      public class RouteMapper : IServiceRouteMapper, IContainerAccessor
      {
          public static IUnityContainer Container { get; private set; }

          IUnityContainer IContainerAccessor.Container
          {
              get
              {
                  return Container;
              }
          }

          public void RegisterRoutes(IMapRoute mapRouteManager)
          {
              //seteo ioC
              CreateContainer();               
          }

          public static void CreateContainer()
          {
              IUnityContainer container = new UnityContainer();

              container.LoadConfiguration();

              Container = container;
          }
      }
  }

using System;  
  using System.Collections.Generic;  
  using System.Linq;  
  using System.Web;  
  using System.Web.UI;  
  using Unity;  
    
  namespace MvpPractica	{  
      public class BasePage<T> : Page where T : class  
      {  
          public BasePage()
      {  
              InjectDependencies();  
          }  
    
          protected virtual void InjectDependencies()
          {  
              try  
              {  
                  if (RouteMapper.Container == null)  
                  {  
                      RouteMapper.CreateContainer();  
                  }  
    
                  IUnityContainer container = RouteMapper.Container;  
    
                  container.BuildUp(this as T);  
              }  
              catch (Exception ex)  
              {  
                  throw ex;  
              }  
          }  
    
      }  
  }  

public interface IMainView
{   
  string LabelTabla { set; get; }
  GridView UserGridView { set; get; }
}

    public interface IPresenterTabla
    {
        void SetView(IMainView view);
        void CargarTablaEmpleados();
        void CargarTablaEmpresas();    
    }

//Clase abstracta
    public abstract class PresenterTabla : IPresenterTabla
    {
        public IMainView _view;

        public abstract void CargarTablaEmpleados();

        public abstract void CargarTablaEmpresas();      

        public void SetView(IMainView view)
        {
            this._view = view;
        }      
    }

   

public class PresenterTablaAR : PresenterTabla    {

	public override void CargarTablaEmpleados()
	{
	   //En PresenterTablaUS cambia por 
	   // using (BDEEUUEntities bd = new BDEEUUEntities())
	    using (BDArgentinaEntities bd = new BDArgentinaEntities())
	    {
	   	this._view.LabelTabla = "Empleados de Argentina";
		this._view.UserGridView.DataSource = bd.Empleadoes.ToList();
		this._view.UserGridView.DataBind();
	    }
	}

	public override void CargarTablaEmpresas()
	{
	    using (BDArgentinaEntities bd = new BDArgentinaEntities())
	    {
	   	this._view.LabelTabla = "Empresas de Argentina";
		this._view.UserGridView.DataSource = bd.Empresas.ToList();
		this._view.UserGridView.DataBind();
	    }
	}
} 

    public partial class About : BasePage<About>, IMainView
    {
        [Dependency]
       
       public IPresenterTabla _presenterTabla { get; set; }       
       public GridView UserGridView{ get => GridView1; set => GridView1 = value; }
       public string LabelTabla { get => LabelMensaje.Text; set => LabelMensaje.Text = value; }

        protected void Page_Load(object sender, EventArgs e)
        {

            _presenterTabla.SetView(this);           
          
        }

        protected void ButtonEmpleados_Click(object sender, EventArgs e)
        {
            _presenterTabla.CargarTablaEmpleados();
        }

        protected void ButtonEmpresas_Click(object sender, EventArgs e)
        {
            _presenterTabla.CargarTablaEmpresas();
        }
    }