AOP using System.Reflection.Emit - Code Injection IL

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using SadasSof.Aspects;
using EnterpriseDemo;
using SadasSof.Aspects.Attributes;

namespace WebTestAspects
{
	/// <summary>
	/// Summary description for WebForm1.
	/// </summary>
	public  class WebForm1 : System.Web.UI.Page
				   {
		protected System.Web.UI.WebControls.Button Button1;
		protected System.Web.UI.WebControls.TextBox TextBox1;
		protected System.Web.UI.WebControls.DataGrid DataGrid1;
		protected System.Web.UI.WebControls.CheckBox ckbFilter;
		protected System.Web.UI.WebControls.RadioButtonList rdDelegaton;
		protected System.Web.UI.WebControls.Label Label1;
	
					   protected void Page_Load(object sender, System.EventArgs e)
					   {
						   if(!Page.IsPostBack)
						   {
							   ListItem lI1=new ListItem(BussinesLogicEmployees.Delegation.Madrid.ToString());
							   lI1.Selected=true;
							   rdDelegaton.Items.Add(lI1);
							   rdDelegaton.Items.Add(new ListItem(BussinesLogicEmployees.Delegation.Paris.ToString()) );
							   rdDelegaton.Items.Add(new ListItem(BussinesLogicEmployees.Delegation.London.ToString()) );
						   }
					   }

					   #region Web Form Designer generated code
					   override protected void OnInit(EventArgs e)
					   {
						   //
						   // CODEGEN: This call is required by the ASP.NET Web Form Designer.
						   //
						   InitializeComponent();
						   base.OnInit(e);
					   }
		
					   /// <summary>
					   /// Required method for Designer support - do not modify
					   /// the contents of this method with the code editor.
					   /// </summary>
					   private void InitializeComponent()
					   {    
						   this.Button1.Click += new System.EventHandler(this.Button1_Click);

					   }
					   #endregion

					   protected void Button1_Click(object sender, System.EventArgs e)
					   {
		
						   IBussinesLogicEmployees iBLExternal=null;

						   if(ckbFilter.Checked)
							   iBLExternal=(IBussinesLogicEmployees)CodeInjection.Create(
								   new BussinesLogicEmployees(),
								   typeof(IBussinesLogicEmployeesExternalFilter));
						   else
							   iBLExternal=(IBussinesLogicEmployees)CodeInjection.Create(
								   new BussinesLogicEmployees(),
								   typeof(IBussinesLogicEmployeesAll));
			
						   Employees dsE=null;
			
						   switch(rdDelegaton.SelectedValue)
						   {
							   case "Madrid":
								   dsE = iBLExternal.GetEmployees(BussinesLogicEmployees.Delegation.Madrid);
								   break;

							   case "Paris":
								   dsE = iBLExternal.GetEmployees(BussinesLogicEmployees.Delegation.Paris);
								   break;

							   case "London":
								   dsE = iBLExternal.GetEmployees(BussinesLogicEmployees.Delegation.London);
								   break;
						   }
			
						   TextBox1.Text = CountingCalls.Calls("GetEmployees").ToString();
			
						   DataGrid1.DataSource=dsE;
						   DataGrid1.DataBind();
		
					   }



					   public interface IBussinesLogicEmployees
					   {
						   EnterpriseDemo.Employees GetEmployees(EnterpriseDemo.BussinesLogicEmployees.Delegation delegation);
		
					   }
		
					   public interface IBussinesLogicEmployeesAll:IBussinesLogicEmployees
					   {
						   [CountingCalls]
						   [LoggerExceptionToFile(@"C:\Inetpub\wwwroot\WebTestAspects\logExceptions.txt")]
						   new EnterpriseDemo.Employees GetEmployees(EnterpriseDemo.BussinesLogicEmployees.Delegation delegation);
					   }

					   public interface IBussinesLogicEmployeesExternalFilter:IBussinesLogicEmployees
					   {
						   [CountingCalls]
						   [ExternalFilter]
						   [LoggerToFile(@"C:\Inetpub\wwwroot\WebTestAspects\log.txt")]
						   [LoggerExceptionToFile(@"C:\Inetpub\wwwroot\WebTestAspects\logExceptions.txt")]
						   new EnterpriseDemo.Employees GetEmployees(EnterpriseDemo.BussinesLogicEmployees.Delegation delegation);
					   }
				   }
}