AOP using System.Reflection.Emit - Code Injection IL

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Reflection;
using System.Reflection.Emit;
using EnterpriseDemo;
using SadasSof.Aspects;
using SadasSof.Aspects.Attributes;

namespace WinTestAspect
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.CheckBox ckbFilter;
		private System.Windows.Forms.TextBox TextBox1;
		private System.Windows.Forms.DataGrid DataGrid1;
		private System.Windows.Forms.RadioButton rdDelegation1;
		private System.Windows.Forms.RadioButton rdDelegation2;
		private System.Windows.Forms.RadioButton rdDelegation3;
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();

			//
			// TODO: Add any constructor code after InitializeComponent call
			//
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.button1 = new System.Windows.Forms.Button();
			this.TextBox1 = new System.Windows.Forms.TextBox();
			this.DataGrid1 = new System.Windows.Forms.DataGrid();
			this.ckbFilter = new System.Windows.Forms.CheckBox();
			this.rdDelegation1 = new System.Windows.Forms.RadioButton();
			this.rdDelegation2 = new System.Windows.Forms.RadioButton();
			this.rdDelegation3 = new System.Windows.Forms.RadioButton();
			((System.ComponentModel.ISupportInitialize)(this.DataGrid1)).BeginInit();
			this.SuspendLayout();
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(40, 56);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(80, 23);
			this.button1.TabIndex = 0;
			this.button1.Text = "GetEmployees";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// TextBox1
			// 
			this.TextBox1.Location = new System.Drawing.Point(400, 64);
			this.TextBox1.Name = "TextBox1";
			this.TextBox1.Size = new System.Drawing.Size(64, 20);
			this.TextBox1.TabIndex = 3;
			this.TextBox1.Text = "";
			// 
			// DataGrid1
			// 
			this.DataGrid1.DataMember = "";
			this.DataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText;
			this.DataGrid1.Location = new System.Drawing.Point(32, 104);
			this.DataGrid1.Name = "DataGrid1";
			this.DataGrid1.Size = new System.Drawing.Size(440, 208);
			this.DataGrid1.TabIndex = 6;
			this.DataGrid1.Visible = false;
			// 
			// ckbFilter
			// 
			this.ckbFilter.Location = new System.Drawing.Point(128, 56);
			this.ckbFilter.Name = "ckbFilter";
			this.ckbFilter.TabIndex = 7;
			this.ckbFilter.Text = "External Filter";
			// 
			// rdDelegation1
			// 
			this.rdDelegation1.Checked = true;
			this.rdDelegation1.Location = new System.Drawing.Point(240, 16);
			this.rdDelegation1.Name = "rdDelegation1";
			this.rdDelegation1.TabIndex = 9;
			this.rdDelegation1.TabStop = true;
			this.rdDelegation1.Text = "Madrid";
			// 
			// rdDelegation2
			// 
			this.rdDelegation2.Location = new System.Drawing.Point(240, 40);
			this.rdDelegation2.Name = "rdDelegation2";
			this.rdDelegation2.TabIndex = 10;
			this.rdDelegation2.Text = "Paris";
			// 
			// rdDelegation3
			// 
			this.rdDelegation3.Location = new System.Drawing.Point(240, 64);
			this.rdDelegation3.Name = "rdDelegation3";
			this.rdDelegation3.TabIndex = 11;
			this.rdDelegation3.Text = "London";
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(496, 350);
			this.Controls.Add(this.rdDelegation3);
			this.Controls.Add(this.rdDelegation2);
			this.Controls.Add(this.rdDelegation1);
			this.Controls.Add(this.ckbFilter);
			this.Controls.Add(this.DataGrid1);
			this.Controls.Add(this.TextBox1);
			this.Controls.Add(this.button1);
			this.Name = "Form1";
			this.Text = "Form1";
			this.Load += new System.EventHandler(this.Form1_Load);
			((System.ComponentModel.ISupportInitialize)(this.DataGrid1)).EndInit();
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void Form1_Load(object sender, System.EventArgs e)
		{

		}

		private void button1_Click(object sender, System.EventArgs e)
		{

			try
			{
				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;

				string delegation=string.Empty;
				if(rdDelegation1.Checked)
					delegation="Madrid";
				else if(rdDelegation2.Checked)
					delegation="Paris";
				else
					delegation="London";
			
				switch(delegation)
				{
					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.Visible=true;
				DataGrid1.DataSource=dsE.Tables[0];
			}
			catch(Exception ex)
			{
				DataGrid1.Visible=false;
				MessageBox.Show(ex.InnerException.ToString());
			}
			
		}



	}



	public interface IBussinesLogicEmployees
	{
		EnterpriseDemo.Employees GetEmployees(EnterpriseDemo.BussinesLogicEmployees.Delegation delegation);
		
	}
		
	public interface IBussinesLogicEmployeesAll:IBussinesLogicEmployees
	{
		[CountingCalls]
		[LoggerExceptionToFile]
		new EnterpriseDemo.Employees GetEmployees(EnterpriseDemo.BussinesLogicEmployees.Delegation delegation);
	}

	public interface IBussinesLogicEmployeesExternalFilter:IBussinesLogicEmployees
	{
		[CountingCalls]
		[ExternalFilter]
		[LoggerToFile]
		[LoggerExceptionToFile]
		new EnterpriseDemo.Employees GetEmployees(EnterpriseDemo.BussinesLogicEmployees.Delegation delegation);
	}

}