An introduction to Microsoft's Peer-to-Peer Graphing technology

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

using Peer.Graph;

namespace article_src
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		internal System.Windows.Forms.GroupBox GroupBox2;
		internal System.Windows.Forms.Button Button3;
		internal System.Windows.Forms.Button button1;
		internal System.Windows.Forms.StatusBar StatusBar1;
		internal System.Windows.Forms.StatusBarPanel Listening;
		internal System.Windows.Forms.StatusBarPanel Synchronized;
		internal System.Windows.Forms.StatusBarPanel HasConnections;
		private System.Windows.Forms.TextBox textBox2;
		private System.Windows.Forms.GroupBox groupBox1;
		private System.Windows.Forms.TextBox textBox1;
		internal System.Windows.Forms.Button button4;
		internal System.Windows.Forms.Button Button2;
		private System.Windows.Forms.ListBox listBox1;
		/// <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.GroupBox2 = new System.Windows.Forms.GroupBox();
			this.listBox1 = new System.Windows.Forms.ListBox();
			this.textBox2 = new System.Windows.Forms.TextBox();
			this.button1 = new System.Windows.Forms.Button();
			this.Button3 = new System.Windows.Forms.Button();
			this.StatusBar1 = new System.Windows.Forms.StatusBar();
			this.Listening = new System.Windows.Forms.StatusBarPanel();
			this.Synchronized = new System.Windows.Forms.StatusBarPanel();
			this.HasConnections = new System.Windows.Forms.StatusBarPanel();
			this.groupBox1 = new System.Windows.Forms.GroupBox();
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.button4 = new System.Windows.Forms.Button();
			this.Button2 = new System.Windows.Forms.Button();
			this.GroupBox2.SuspendLayout();
			((System.ComponentModel.ISupportInitialize)(this.Listening)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.Synchronized)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.HasConnections)).BeginInit();
			this.groupBox1.SuspendLayout();
			this.SuspendLayout();
			// 
			// GroupBox2
			// 
			this.GroupBox2.Controls.Add(this.listBox1);
			this.GroupBox2.Controls.Add(this.textBox2);
			this.GroupBox2.Controls.Add(this.button1);
			this.GroupBox2.Controls.Add(this.Button3);
			this.GroupBox2.Location = new System.Drawing.Point(8, 8);
			this.GroupBox2.Name = "GroupBox2";
			this.GroupBox2.Size = new System.Drawing.Size(368, 208);
			this.GroupBox2.TabIndex = 14;
			this.GroupBox2.TabStop = false;
			this.GroupBox2.Text = "Open Graph";
			// 
			// listBox1
			// 
			this.listBox1.Location = new System.Drawing.Point(8, 64);
			this.listBox1.Name = "listBox1";
			this.listBox1.Size = new System.Drawing.Size(344, 134);
			this.listBox1.TabIndex = 17;
			// 
			// textBox2
			// 
			this.textBox2.Location = new System.Drawing.Point(96, 24);
			this.textBox2.Name = "textBox2";
			this.textBox2.Size = new System.Drawing.Size(176, 20);
			this.textBox2.TabIndex = 14;
			this.textBox2.Text = "User1";
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(280, 24);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(72, 24);
			this.button1.TabIndex = 11;
			this.button1.Text = "Close";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// Button3
			// 
			this.Button3.Location = new System.Drawing.Point(16, 24);
			this.Button3.Name = "Button3";
			this.Button3.Size = new System.Drawing.Size(72, 24);
			this.Button3.TabIndex = 10;
			this.Button3.Text = "Open";
			this.Button3.Click += new System.EventHandler(this.Button3_Click);
			// 
			// StatusBar1
			// 
			this.StatusBar1.Location = new System.Drawing.Point(0, 290);
			this.StatusBar1.Name = "StatusBar1";
			this.StatusBar1.Panels.AddRange(new System.Windows.Forms.StatusBarPanel[] {
																						  this.Listening,
																						  this.Synchronized,
																						  this.HasConnections});
			this.StatusBar1.ShowPanels = true;
			this.StatusBar1.Size = new System.Drawing.Size(386, 22);
			this.StatusBar1.TabIndex = 15;
			this.StatusBar1.Text = "StatusBar1";
			// 
			// groupBox1
			// 
			this.groupBox1.Controls.Add(this.textBox1);
			this.groupBox1.Controls.Add(this.button4);
			this.groupBox1.Controls.Add(this.Button2);
			this.groupBox1.Location = new System.Drawing.Point(8, 224);
			this.groupBox1.Name = "groupBox1";
			this.groupBox1.Size = new System.Drawing.Size(368, 64);
			this.groupBox1.TabIndex = 17;
			this.groupBox1.TabStop = false;
			this.groupBox1.Text = "Create or Delete \"Test Graph\"";
			// 
			// textBox1
			// 
			this.textBox1.Location = new System.Drawing.Point(96, 24);
			this.textBox1.Name = "textBox1";
			this.textBox1.Size = new System.Drawing.Size(176, 20);
			this.textBox1.TabIndex = 16;
			this.textBox1.Text = "User1";
			// 
			// button4
			// 
			this.button4.Location = new System.Drawing.Point(280, 24);
			this.button4.Name = "button4";
			this.button4.Size = new System.Drawing.Size(72, 24);
			this.button4.TabIndex = 15;
			this.button4.Text = "Delete";
			this.button4.Click += new System.EventHandler(this.button4_Click);
			// 
			// Button2
			// 
			this.Button2.Location = new System.Drawing.Point(16, 24);
			this.Button2.Name = "Button2";
			this.Button2.Size = new System.Drawing.Size(72, 24);
			this.Button2.TabIndex = 14;
			this.Button2.Text = "Create";
			this.Button2.Click += new System.EventHandler(this.Button2_Click);
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(386, 312);
			this.Controls.Add(this.groupBox1);
			this.Controls.Add(this.StatusBar1);
			this.Controls.Add(this.GroupBox2);
			this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
			this.MaximizeBox = false;
			this.MinimizeBox = false;
			this.Name = "Form1";
			this.Text = "Peer Graph - Create / Open Demo";
			this.Load += new System.EventHandler(this.Form1_Load);
			this.GroupBox2.ResumeLayout(false);
			((System.ComponentModel.ISupportInitialize)(this.Listening)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.Synchronized)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.HasConnections)).EndInit();
			this.groupBox1.ResumeLayout(false);
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}
		
		private PeerGraph graph;
		string DatabaseName = @"Database";
		string GraphName = @"Test Graph";

		private void Form1_Load(object sender, System.EventArgs e)
		{
			graph = new PeerGraph(GraphName);
			graph.StatusChanged += new PeerGraph.StatusChangedHandler(OnStatusChanged);
		}

		private void LogMessage(string Member, string Message)
		{
			listBox1.Items.Add(String.Format("[{0}]: {1}", Member, Message));
		}

		private void OpenClose(bool state)
		{
			Button3.Enabled = state;
			textBox2.Enabled = state;
		}

		private void Button3_Click(object sender, System.EventArgs e)
		{
			try
			{
				graph.Open(DatabaseName, textBox2.Text);
				OpenClose(false);
				LogMessage(@"Open", @"Completed");
			}
			catch (Exception ex)
			{
				LogMessage(@"Open", ex.Message);
			}
		}


		private void button1_Click(object sender, System.EventArgs e)
		{
			try
			{
				graph.Close();
				OpenClose(true);
				LogMessage(@"Close", @"Completed");
			}
			catch (Exception ex)
			{
				LogMessage(@"Close", ex.Message);
			}
		}

		private void Button2_Click(object sender, System.EventArgs e)
		{
			try
			{
				PeerGraph.Create(GraphName, textBox1.Text, DatabaseName);
				LogMessage(@"Create", @"Completed");
			}
			catch (Exception ex)
			{
				LogMessage(@"Create", ex.Message);
			}
		}

		private void button4_Click(object sender, System.EventArgs e)
		{
			try
			{
				PeerGraph.Delete(GraphName, textBox1.Text, DatabaseName);
				LogMessage(@"Delete", @"Completed");
			}
			catch (Exception ex)
			{
				LogMessage(@"Delete", ex.Message);
			}
		}

		private void OnStatusChanged(object sender, PeerGraphStatusChangedEventArgs e)
		{
			string status = string.Empty;
			if (e.IsListening)
				 status = @"Listening";
			StatusBar1.Panels[0].Text = status;
			status = string.Empty;
			if (e.IsSynchronized)
				status = @"Synchronized";
			StatusBar1.Panels[1].Text = status;
			status = string.Empty;
			if (e.HasConnections)
				status = @"Has Connections";
			StatusBar1.Panels[2].Text = status;
		}

	}
}