Proxy Delegates

using System;
using System.Drawing;
using System.Reflection;
using System.Windows.Forms;

namespace ProxyDemo
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private MethodInfo mi;

		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Button button2;
		private System.Windows.Forms.TextBox textBox1;
		private System.Windows.Forms.Label label1;
		/// <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.button2 = new System.Windows.Forms.Button();
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.label1 = new System.Windows.Forms.Label();
			this.SuspendLayout();
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(24, 24);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(96, 24);
			this.button1.TabIndex = 0;
			this.button1.Text = "Load Plug In";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// button2
			// 
			this.button2.Enabled = false;
			this.button2.Location = new System.Drawing.Point(24, 64);
			this.button2.Name = "button2";
			this.button2.Size = new System.Drawing.Size(96, 24);
			this.button2.TabIndex = 1;
			this.button2.Text = "Invoke";
			this.button2.Click += new System.EventHandler(this.button2_Click);
			// 
			// textBox1
			// 
			this.textBox1.Location = new System.Drawing.Point(88, 108);
			this.textBox1.Name = "textBox1";
			this.textBox1.ReadOnly = true;
			this.textBox1.Size = new System.Drawing.Size(128, 20);
			this.textBox1.TabIndex = 2;
			this.textBox1.Text = "";
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(24, 112);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(56, 23);
			this.label1.TabIndex = 3;
			this.label1.Text = "Callback:";
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(292, 142);
			this.Controls.AddRange(new System.Windows.Forms.Control[] {
															   this.label1,
															   this.textBox1,
															   this.button2,
															   this.button1});
			this.Name = "Form1";
			this.Text = "Proxy Demo";
			this.ResumeLayout(false);

		}
		#endregion

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

		private void button1_Click(object sender, System.EventArgs e)
		{
			button1.Enabled=false;
			button2.Enabled=true;
			mi=GetMethodInfo("PlugIn.dll/PlugIn.PlugIn/Test");
		}

		private void button2_Click(object sender, System.EventArgs e)
		{
			Proxy.Callback cbck=new Proxy.Callback(CallbackTest);
			object[] parms=new object[] {cbck};
			mi.Invoke(null, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.InvokeMethod | BindingFlags.Static, null, parms, null);
		}

		private void CallbackTest(string s)
		{
			textBox1.Text=s;
		}

		/// <summary>
		/// Returns a MethodInfo object with the parsed reflect string.
		/// </summary>
		/// <param name="reflection">A reflection method name, in the format "assembly/namespace.class/method".</param>
		/// <returns></returns>
		public static MethodInfo GetMethodInfo(string reflection)
		{
			MethodInfo mi=null;
			string[] info=reflection.Split(new char[] {'/'});
			Assembly mainAssembly=Assembly.LoadFrom(info[0]);
			Type type=mainAssembly.GetType(info[1]);
			mi=type.GetMethod(info[2]);
			return mi;
		}
	}
}