SwitchNetConfig - Laptop users, quickly switch network and proxy configuration in different places

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Xml.Serialization;
using System.Xml;

namespace SwitchNetConfig
{
	/// <summary>
	/// Main Form displayed at startup
	/// </summary>
	public class MainForm : System.Windows.Forms.Form
	{
		#region Designer

		private System.Windows.Forms.Label lblProfile;
		private System.Windows.Forms.ComboBox cboProfiles;
		private System.Windows.Forms.Button btnNewProfile;
		private System.Windows.Forms.ComboBox cboNIC;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Label lblIP;
		private System.Windows.Forms.Label lblSubnet;
		private System.Windows.Forms.Label lblGateway;
		private System.Windows.Forms.Label lblDNS;
		private System.Windows.Forms.TextBox txtIP;
		private System.Windows.Forms.Button btnActivate;
		private System.Windows.Forms.Button btnClose;
		private System.Windows.Forms.TextBox txtDNS;
		private System.Windows.Forms.TextBox txtGateway;
		private System.Windows.Forms.TextBox txtSubnet;
		private System.Windows.Forms.GroupBox grpNIC;
		private System.Windows.Forms.GroupBox grpIEProxy;
		private System.Windows.Forms.CheckBox chkUseProxy;
		private System.Windows.Forms.Label lblProxy;
		private System.Windows.Forms.CheckBox chkByPassForLocal;
		private System.Windows.Forms.GroupBox grpProxy;
		private System.Windows.Forms.TextBox txtProxy;
		private System.Windows.Forms.GroupBox grpCurrent;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.Label label4;
		private System.Windows.Forms.Label label5;
		private System.Windows.Forms.Label lblCurrentDNS;
		private System.Windows.Forms.Label lblCurrentGateway;
		private System.Windows.Forms.Label lblCurrentSubnet;
		private System.Windows.Forms.Label lblCurrentIP;
		private System.Windows.Forms.Label label6;
		private System.Windows.Forms.Label lblCurrentProxy;
		private System.Windows.Forms.CheckBox chkDHCP;
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;

		public MainForm()
		{
			//
			// 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.cboProfiles = new System.Windows.Forms.ComboBox();
			this.lblProfile = new System.Windows.Forms.Label();
			this.btnNewProfile = new System.Windows.Forms.Button();
			this.grpNIC = new System.Windows.Forms.GroupBox();
			this.txtDNS = new System.Windows.Forms.TextBox();
			this.txtGateway = new System.Windows.Forms.TextBox();
			this.txtSubnet = new System.Windows.Forms.TextBox();
			this.txtIP = new System.Windows.Forms.TextBox();
			this.lblDNS = new System.Windows.Forms.Label();
			this.lblGateway = new System.Windows.Forms.Label();
			this.lblSubnet = new System.Windows.Forms.Label();
			this.lblIP = new System.Windows.Forms.Label();
			this.label1 = new System.Windows.Forms.Label();
			this.cboNIC = new System.Windows.Forms.ComboBox();
			this.btnActivate = new System.Windows.Forms.Button();
			this.btnClose = new System.Windows.Forms.Button();
			this.grpIEProxy = new System.Windows.Forms.GroupBox();
			this.grpProxy = new System.Windows.Forms.GroupBox();
			this.chkByPassForLocal = new System.Windows.Forms.CheckBox();
			this.txtProxy = new System.Windows.Forms.TextBox();
			this.lblProxy = new System.Windows.Forms.Label();
			this.chkUseProxy = new System.Windows.Forms.CheckBox();
			this.grpCurrent = new System.Windows.Forms.GroupBox();
			this.label2 = new System.Windows.Forms.Label();
			this.label3 = new System.Windows.Forms.Label();
			this.label4 = new System.Windows.Forms.Label();
			this.label5 = new System.Windows.Forms.Label();
			this.lblCurrentDNS = new System.Windows.Forms.Label();
			this.lblCurrentGateway = new System.Windows.Forms.Label();
			this.lblCurrentSubnet = new System.Windows.Forms.Label();
			this.lblCurrentIP = new System.Windows.Forms.Label();
			this.label6 = new System.Windows.Forms.Label();
			this.lblCurrentProxy = new System.Windows.Forms.Label();
			this.chkDHCP = new System.Windows.Forms.CheckBox();
			this.grpNIC.SuspendLayout();
			this.grpIEProxy.SuspendLayout();
			this.grpProxy.SuspendLayout();
			this.grpCurrent.SuspendLayout();
			this.SuspendLayout();
			// 
			// cboProfiles
			// 
			this.cboProfiles.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
			this.cboProfiles.Location = new System.Drawing.Point(64, 8);
			this.cboProfiles.Name = "cboProfiles";
			this.cboProfiles.Size = new System.Drawing.Size(368, 21);
			this.cboProfiles.TabIndex = 2;
			this.cboProfiles.SelectedIndexChanged += new System.EventHandler(this.cboProfiles_SelectedIndexChanged);
			// 
			// lblProfile
			// 
			this.lblProfile.AutoSize = true;
			this.lblProfile.Location = new System.Drawing.Point(8, 8);
			this.lblProfile.Name = "lblProfile";
			this.lblProfile.Size = new System.Drawing.Size(39, 17);
			this.lblProfile.TabIndex = 1;
			this.lblProfile.Text = "&Profile:";
			// 
			// btnNewProfile
			// 
			this.btnNewProfile.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
			this.btnNewProfile.Location = new System.Drawing.Point(440, 8);
			this.btnNewProfile.Name = "btnNewProfile";
			this.btnNewProfile.Size = new System.Drawing.Size(64, 23);
			this.btnNewProfile.TabIndex = 3;
			this.btnNewProfile.Text = "&New...";
			this.btnNewProfile.Click += new System.EventHandler(this.btnNewProfile_Click);
			// 
			// grpNIC
			// 
			this.grpNIC.Controls.Add(this.chkDHCP);
			this.grpNIC.Controls.Add(this.txtDNS);
			this.grpNIC.Controls.Add(this.txtGateway);
			this.grpNIC.Controls.Add(this.txtSubnet);
			this.grpNIC.Controls.Add(this.txtIP);
			this.grpNIC.Controls.Add(this.lblDNS);
			this.grpNIC.Controls.Add(this.lblGateway);
			this.grpNIC.Controls.Add(this.lblSubnet);
			this.grpNIC.Controls.Add(this.lblIP);
			this.grpNIC.Controls.Add(this.label1);
			this.grpNIC.Controls.Add(this.cboNIC);
			this.grpNIC.Enabled = false;
			this.grpNIC.Location = new System.Drawing.Point(8, 32);
			this.grpNIC.Name = "grpNIC";
			this.grpNIC.Size = new System.Drawing.Size(496, 168);
			this.grpNIC.TabIndex = 3;
			this.grpNIC.TabStop = false;
			this.grpNIC.Text = "IP Configuration";
			// 
			// txtDNS
			// 
			this.txtDNS.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.txtDNS.Location = new System.Drawing.Point(64, 136);
			this.txtDNS.Name = "txtDNS";
			this.txtDNS.Size = new System.Drawing.Size(424, 21);
			this.txtDNS.TabIndex = 13;
			this.txtDNS.Text = "";
			this.txtDNS.Leave += new System.EventHandler(this.txtDNS_Leave);
			// 
			// txtGateway
			// 
			this.txtGateway.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.txtGateway.Location = new System.Drawing.Point(64, 112);
			this.txtGateway.Name = "txtGateway";
			this.txtGateway.Size = new System.Drawing.Size(424, 21);
			this.txtGateway.TabIndex = 11;
			this.txtGateway.Text = "";
			this.txtGateway.Leave += new System.EventHandler(this.txtGateway_Leave);
			// 
			// txtSubnet
			// 
			this.txtSubnet.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.txtSubnet.Location = new System.Drawing.Point(64, 88);
			this.txtSubnet.Name = "txtSubnet";
			this.txtSubnet.Size = new System.Drawing.Size(424, 21);
			this.txtSubnet.TabIndex = 9;
			this.txtSubnet.Text = "";
			this.txtSubnet.Leave += new System.EventHandler(this.txtSubnet_Leave);
			// 
			// txtIP
			// 
			this.txtIP.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.txtIP.Location = new System.Drawing.Point(64, 64);
			this.txtIP.Name = "txtIP";
			this.txtIP.Size = new System.Drawing.Size(424, 21);
			this.txtIP.TabIndex = 7;
			this.txtIP.Text = "";
			this.txtIP.Leave += new System.EventHandler(this.txtIP_Leave);
			// 
			// lblDNS
			// 
			this.lblDNS.AutoSize = true;
			this.lblDNS.Location = new System.Drawing.Point(8, 136);
			this.lblDNS.Name = "lblDNS";
			this.lblDNS.Size = new System.Drawing.Size(30, 17);
			this.lblDNS.TabIndex = 12;
			this.lblDNS.Text = "&DNS:";
			// 
			// lblGateway
			// 
			this.lblGateway.AutoSize = true;
			this.lblGateway.Location = new System.Drawing.Point(8, 112);
			this.lblGateway.Name = "lblGateway";
			this.lblGateway.Size = new System.Drawing.Size(51, 17);
			this.lblGateway.TabIndex = 10;
			this.lblGateway.Text = "&Gateway:";
			// 
			// lblSubnet
			// 
			this.lblSubnet.AutoSize = true;
			this.lblSubnet.Location = new System.Drawing.Point(8, 88);
			this.lblSubnet.Name = "lblSubnet";
			this.lblSubnet.Size = new System.Drawing.Size(43, 17);
			this.lblSubnet.TabIndex = 8;
			this.lblSubnet.Text = "&Subnet:";
			// 
			// lblIP
			// 
			this.lblIP.AutoSize = true;
			this.lblIP.Location = new System.Drawing.Point(8, 64);
			this.lblIP.Name = "lblIP";
			this.lblIP.Size = new System.Drawing.Size(19, 17);
			this.lblIP.TabIndex = 6;
			this.lblIP.Text = "&IP:";
			// 
			// label1
			// 
			this.label1.AutoSize = true;
			this.label1.Location = new System.Drawing.Point(8, 16);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(76, 17);
			this.label1.TabIndex = 4;
			this.label1.Text = "Network &Card:";
			// 
			// cboNIC
			// 
			this.cboNIC.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
			this.cboNIC.Location = new System.Drawing.Point(96, 16);
			this.cboNIC.Name = "cboNIC";
			this.cboNIC.Size = new System.Drawing.Size(392, 21);
			this.cboNIC.TabIndex = 5;
			this.cboNIC.SelectedIndexChanged += new System.EventHandler(this.cboNIC_SelectedIndexChanged);
			// 
			// btnActivate
			// 
			this.btnActivate.Enabled = false;
			this.btnActivate.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
			this.btnActivate.Location = new System.Drawing.Point(264, 472);
			this.btnActivate.Name = "btnActivate";
			this.btnActivate.Size = new System.Drawing.Size(152, 23);
			this.btnActivate.TabIndex = 18;
			this.btnActivate.Text = "&Activate Profile...";
			this.btnActivate.Click += new System.EventHandler(this.btnActivate_Click);
			// 
			// btnClose
			// 
			this.btnClose.DialogResult = System.Windows.Forms.DialogResult.Cancel;
			this.btnClose.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
			this.btnClose.Location = new System.Drawing.Point(424, 472);
			this.btnClose.Name = "btnClose";
			this.btnClose.Size = new System.Drawing.Size(80, 23);
			this.btnClose.TabIndex = 19;
			this.btnClose.Text = "&Close";
			this.btnClose.Click += new System.EventHandler(this.btnClose_Click);
			// 
			// grpIEProxy
			// 
			this.grpIEProxy.Controls.Add(this.grpProxy);
			this.grpIEProxy.Controls.Add(this.chkUseProxy);
			this.grpIEProxy.Enabled = false;
			this.grpIEProxy.Location = new System.Drawing.Point(8, 200);
			this.grpIEProxy.Name = "grpIEProxy";
			this.grpIEProxy.Size = new System.Drawing.Size(496, 136);
			this.grpIEProxy.TabIndex = 6;
			this.grpIEProxy.TabStop = false;
			this.grpIEProxy.Text = "Internet Explorer Proxy";
			// 
			// grpProxy
			// 
			this.grpProxy.Controls.Add(this.chkByPassForLocal);
			this.grpProxy.Controls.Add(this.txtProxy);
			this.grpProxy.Controls.Add(this.lblProxy);
			this.grpProxy.Location = new System.Drawing.Point(8, 48);
			this.grpProxy.Name = "grpProxy";
			this.grpProxy.Size = new System.Drawing.Size(480, 80);
			this.grpProxy.TabIndex = 12;
			this.grpProxy.TabStop = false;
			this.grpProxy.Text = "Proxy";
			// 
			// chkByPassForLocal
			// 
			this.chkByPassForLocal.Location = new System.Drawing.Point(64, 48);
			this.chkByPassForLocal.Name = "chkByPassForLocal";
			this.chkByPassForLocal.Size = new System.Drawing.Size(152, 16);
			this.chkByPassForLocal.TabIndex = 17;
			this.chkByPassForLocal.Text = "&Bypass for local address";
			this.chkByPassForLocal.CheckedChanged += new System.EventHandler(this.chkByPassForLocal_CheckedChanged);
			// 
			// txtProxy
			// 
			this.txtProxy.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.txtProxy.Location = new System.Drawing.Point(64, 24);
			this.txtProxy.Name = "txtProxy";
			this.txtProxy.Size = new System.Drawing.Size(408, 21);
			this.txtProxy.TabIndex = 16;
			this.txtProxy.Text = "";
			this.txtProxy.Leave += new System.EventHandler(this.txtProxy_Leave);
			// 
			// lblProxy
			// 
			this.lblProxy.AutoSize = true;
			this.lblProxy.Location = new System.Drawing.Point(8, 24);
			this.lblProxy.Name = "lblProxy";
			this.lblProxy.Size = new System.Drawing.Size(36, 17);
			this.lblProxy.TabIndex = 15;
			this.lblProxy.Text = "Pro&xy:";
			// 
			// chkUseProxy
			// 
			this.chkUseProxy.Location = new System.Drawing.Point(8, 24);
			this.chkUseProxy.Name = "chkUseProxy";
			this.chkUseProxy.Size = new System.Drawing.Size(80, 16);
			this.chkUseProxy.TabIndex = 14;
			this.chkUseProxy.Text = "&Use Proxy";
			this.chkUseProxy.CheckedChanged += new System.EventHandler(this.chkUseProxy_CheckedChanged);
			// 
			// grpCurrent
			// 
			this.grpCurrent.Controls.Add(this.label2);
			this.grpCurrent.Controls.Add(this.label3);
			this.grpCurrent.Controls.Add(this.label4);
			this.grpCurrent.Controls.Add(this.label5);
			this.grpCurrent.Controls.Add(this.lblCurrentDNS);
			this.grpCurrent.Controls.Add(this.lblCurrentGateway);
			this.grpCurrent.Controls.Add(this.lblCurrentSubnet);
			this.grpCurrent.Controls.Add(this.lblCurrentIP);
			this.grpCurrent.Controls.Add(this.label6);
			this.grpCurrent.Controls.Add(this.lblCurrentProxy);
			this.grpCurrent.Location = new System.Drawing.Point(8, 336);
			this.grpCurrent.Name = "grpCurrent";
			this.grpCurrent.Size = new System.Drawing.Size(496, 128);
			this.grpCurrent.TabIndex = 7;
			this.grpCurrent.TabStop = false;
			this.grpCurrent.Text = "Current Configuration";
			// 
			// label2
			// 
			this.label2.AutoSize = true;
			this.label2.Location = new System.Drawing.Point(8, 96);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(30, 17);
			this.label2.TabIndex = 10;
			this.label2.Text = "DNS:";
			// 
			// label3
			// 
			this.label3.AutoSize = true;
			this.label3.Location = new System.Drawing.Point(8, 72);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(51, 17);
			this.label3.TabIndex = 9;
			this.label3.Text = "Gateway:";
			// 
			// label4
			// 
			this.label4.AutoSize = true;
			this.label4.Location = new System.Drawing.Point(8, 48);
			this.label4.Name = "label4";
			this.label4.Size = new System.Drawing.Size(43, 17);
			this.label4.TabIndex = 8;
			this.label4.Text = "Subnet:";
			// 
			// label5
			// 
			this.label5.AutoSize = true;
			this.label5.Location = new System.Drawing.Point(8, 24);
			this.label5.Name = "label5";
			this.label5.Size = new System.Drawing.Size(19, 17);
			this.label5.TabIndex = 7;
			this.label5.Text = "IP:";
			// 
			// lblCurrentDNS
			// 
			this.lblCurrentDNS.AutoSize = true;
			this.lblCurrentDNS.Location = new System.Drawing.Point(64, 96);
			this.lblCurrentDNS.Name = "lblCurrentDNS";
			this.lblCurrentDNS.Size = new System.Drawing.Size(0, 17);
			this.lblCurrentDNS.TabIndex = 10;
			// 
			// lblCurrentGateway
			// 
			this.lblCurrentGateway.AutoSize = true;
			this.lblCurrentGateway.Location = new System.Drawing.Point(64, 72);
			this.lblCurrentGateway.Name = "lblCurrentGateway";
			this.lblCurrentGateway.Size = new System.Drawing.Size(0, 17);
			this.lblCurrentGateway.TabIndex = 9;
			// 
			// lblCurrentSubnet
			// 
			this.lblCurrentSubnet.AutoSize = true;
			this.lblCurrentSubnet.Location = new System.Drawing.Point(64, 48);
			this.lblCurrentSubnet.Name = "lblCurrentSubnet";
			this.lblCurrentSubnet.Size = new System.Drawing.Size(0, 17);
			this.lblCurrentSubnet.TabIndex = 8;
			// 
			// lblCurrentIP
			// 
			this.lblCurrentIP.AutoSize = true;
			this.lblCurrentIP.Location = new System.Drawing.Point(64, 24);
			this.lblCurrentIP.Name = "lblCurrentIP";
			this.lblCurrentIP.Size = new System.Drawing.Size(0, 17);
			this.lblCurrentIP.TabIndex = 7;
			// 
			// label6
			// 
			this.label6.AutoSize = true;
			this.label6.Location = new System.Drawing.Point(256, 24);
			this.label6.Name = "label6";
			this.label6.Size = new System.Drawing.Size(36, 17);
			this.label6.TabIndex = 7;
			this.label6.Text = "Proxy:";
			// 
			// lblCurrentProxy
			// 
			this.lblCurrentProxy.AutoSize = true;
			this.lblCurrentProxy.Location = new System.Drawing.Point(256, 48);
			this.lblCurrentProxy.Name = "lblCurrentProxy";
			this.lblCurrentProxy.Size = new System.Drawing.Size(0, 17);
			this.lblCurrentProxy.TabIndex = 7;
			// 
			// chkDHCP
			// 
			this.chkDHCP.Location = new System.Drawing.Point(8, 40);
			this.chkDHCP.Name = "chkDHCP";
			this.chkDHCP.Size = new System.Drawing.Size(160, 16);
			this.chkDHCP.TabIndex = 6;
			this.chkDHCP.Text = "Obtain IP from &DHCP";
			this.chkDHCP.CheckedChanged += new System.EventHandler(this.chkDHCP_CheckedChanged);
			// 
			// MainForm
			// 
			this.AcceptButton = this.btnActivate;
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 14);
			this.CancelButton = this.btnClose;
			this.ClientSize = new System.Drawing.Size(512, 501);
			this.Controls.Add(this.grpCurrent);
			this.Controls.Add(this.grpIEProxy);
			this.Controls.Add(this.btnClose);
			this.Controls.Add(this.btnActivate);
			this.Controls.Add(this.grpNIC);
			this.Controls.Add(this.btnNewProfile);
			this.Controls.Add(this.lblProfile);
			this.Controls.Add(this.cboProfiles);
			this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.Name = "MainForm";
			this.Text = "SwitchNetConfig ver 1.0";
			this.Closing += new System.ComponentModel.CancelEventHandler(this.MainForm_Closing);
			this.Load += new System.EventHandler(this.MainForm_Load);
			this.grpNIC.ResumeLayout(false);
			this.grpIEProxy.ResumeLayout(false);
			this.grpProxy.ResumeLayout(false);
			this.grpCurrent.ResumeLayout(false);
			this.ResumeLayout(false);

		}
		#endregion

		#endregion

		#region Private Variables and properties

		// stores all the profiles
		private ArrayList _Profiles = new ArrayList();

		/// <summary>
		/// Returns the currently selected profile object
		/// </summary>
		private Profile _CurrentProfile
		{
			get
			{
				// find the profile for the currently selected profile
				foreach( Profile profile in _Profiles )
					if( profile.Name.Equals( _ProfileName ) )
						return profile;

				return null;
			}
		}

		/// <summary>
		/// Returns the NICProfile object for the currently selected NIC Name
		/// </summary>
		private NICProfile _CurrentNICProfile
		{
			get
			{
				// find the NIC Profile for the currently selected NIC name
				foreach( NICProfile profile in _CurrentProfile.NICProfiles )
					if( profile.Name.Equals( _NICName ) )
						return profile;
				
				// not found, create a new NIC Profile
				NICProfile newProfile = new NICProfile( cboNIC.Text );
				_CurrentProfile.NICProfiles.Add( newProfile );

				return newProfile;
			}
		}

		/// <summary>
		/// Returns the current NICName
		/// </summary>
		private string _NICName
		{
			get
			{
				return cboNIC.SelectedItem as string;
			}
		}

		/// <summary>
		/// returns the current profile name
		/// </summary>
		private string _ProfileName 
		{
			get
			{
				return cboProfiles.SelectedItem as string;
			}
		}

		#endregion

		#region Private Methods

		/// <summary>
		/// Load profile from configuration file
		/// </summary>
		private void loadProfiles()
		{
			_Profiles = ConfigurationHelper.LoadConfig();
		
			// populate the profile drop down list
			cboProfiles.Items.Clear();
			foreach( Profile profile in _Profiles )
			{
				cboProfiles.Items.Add( profile.Name );
			}
		}

		/// <summary>
		/// Load a particular profile
		/// </summary>
		/// <param name="profile"></param>
		private void loadProfile( Profile profile )
		{
			// load the NIC list
			loadNICs();

			// load proxy setting
			loadIEProxy();			

			btnActivate.Enabled = true;
		}

		/// <summary>
		/// Load NIC names
		/// </summary>
		private void loadNICs()
		{
			// get the NIC names
			ArrayList nicNames = WMIHelper.GetNICNames();

			// populate the NIC list
			cboNIC.Items.Clear();
			foreach( string name in nicNames )
				cboNIC.Items.Add( name );

			// if NIC found, select the first one
			if( cboNIC.Items.Count > 0 )
			{
				cboNIC.SelectedIndex = 0;
				grpNIC.Enabled = true;
			}
		}


		/// <summary>
		/// Show the IP, DNS, Gateway and Subnet mask for the NIC name
		/// </summary>
		/// <param name="nicName"></param>
		private void loadNICProfile( string nicName )
		{
			NICProfile nicProfile = _CurrentNICProfile;
			if( null == nicProfile ) return;

			txtIP.Text = nicProfile.IP;
			txtSubnet.Text = nicProfile.Subnet;
			txtGateway.Text = nicProfile.Gateway;
			txtDNS.Text = nicProfile.DNS;			
			chkDHCP.Checked = nicProfile.UseDHCP;
		}

		/// <summary>
		/// Loads IE Proxy settings
		/// </summary>
		private void loadIEProxy( )
		{
			IEProfile profile = _CurrentProfile.IEProfile;

			chkUseProxy.Checked = profile.UseProxy;
			chkByPassForLocal.Checked = profile.BypassLocal;
			//txtLocal.Text = profile.BypassAddresses;
			txtProxy.Text = profile.ProxyName;

			grpIEProxy.Enabled = true;
		}

		private void saveProfiles()
		{
			ConfigurationHelper.SaveConfig( _Profiles );
		}

		private void createNewProfile()
		{
			using( NewProfileDialog newProfileDialog = new NewProfileDialog() )
			{

				if( DialogResult.OK == newProfileDialog.ShowDialog( this ) )
				{
					// create a new profile object
					Profile newProfile = new Profile( newProfileDialog.NewProfileName );
					_Profiles.Add( newProfile );

					// show it in the drop down as selected
					cboProfiles.SelectedIndex = cboProfiles.Items.Add( newProfile.Name );

					// load the NIC list
					loadNICs();
				}
			}
		}

		/// <summary>
		/// Loads current network configuration for the specified NIC and show in 
		/// the current configuration block
		/// </summary>
		/// <param name="nicName"></param>
		private void loadCurrentSetting( string nicName )
		{
			
			string [] ipAddresses;
			string [] subnets;
			string [] gateways;
			string [] dnses;

			// Load current IP configuration for the selected NIC
			WMIHelper.GetIP( nicName, out ipAddresses, out subnets, out gateways, out dnses );

			// if network connection is disabled, no information will be available
			if( null == ipAddresses || null == subnets || null == gateways || null == dnses )
				return;

			// Show the setting
			lblCurrentIP.Text = string.Join( ",", ipAddresses );
			lblCurrentSubnet.Text = string.Join( ",", subnets );
			lblCurrentGateway.Text = string.Join( ",", gateways );
			lblCurrentDNS.Text = string.Join( ",", dnses );
		}

		/// <summary>
		/// Displayes current proxy setting for Internet Explorer
		/// </summary>
		private void loadCurrentProxySetting()
		{
			if( IEProxy.ProxyEnabled )
				lblCurrentProxy.Text = IEProxy.ProxyServer;
			else
				lblCurrentProxy.Text = "No Proxy";

			if( IEProxy.BypassProxyForLocal )
				lblCurrentProxy.Text += ". Bypass local";
			else
				lblCurrentProxy.Text += ". Do not bypass local";
		}

		/// <summary>
		/// Apply currently selected profile
		/// </summary>
		private void applyProfile()
		{
			ApplySettingDialog applyDialog = new ApplySettingDialog();			
			applyDialog.Show();
			applyDialog.Refresh();

			// Start applying setting
			applyDialog.ApplySetting( _CurrentProfile );

			// show current configuration after applying
			loadCurrentSetting( _NICName );
			loadCurrentProxySetting();		
		}

		private void close()
		{
			this.Close();
		}

		private void loadApp()
		{
			loadProfiles();
			loadCurrentProxySetting();
		}

		#endregion

		#region Events

		private void chkUseProxy_CheckedChanged(object sender, System.EventArgs e)
		{
			_CurrentProfile.IEProfile.UseProxy = grpProxy.Enabled = chkUseProxy.Checked;			 
		}
		
		private void cboProfiles_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			loadProfile( _CurrentProfile );
		}

		private void txtIP_Leave(object sender, System.EventArgs e)
		{
			_CurrentNICProfile.IP = txtIP.Text;
		}

		private void txtSubnet_Leave(object sender, System.EventArgs e)
		{
			_CurrentNICProfile.Subnet = txtSubnet.Text;
		}

		private void txtGateway_Leave(object sender, System.EventArgs e)
		{
			_CurrentNICProfile.Gateway = txtGateway.Text;
		}

		private void txtDNS_Leave(object sender, System.EventArgs e)
		{
			_CurrentNICProfile.DNS = txtDNS.Text;
		}

		private void txtProxy_Leave(object sender, System.EventArgs e)
		{
			_CurrentProfile.IEProfile.ProxyName = txtProxy.Text;
		}
		
		private void chkByPassForLocal_CheckedChanged(object sender, System.EventArgs e)
		{
			_CurrentProfile.IEProfile.BypassLocal = chkByPassForLocal.Checked;
		}
		
		private void txtLocal_Leave(object sender, System.EventArgs e)
		{
			//_CurrentProfile.IEProfile.BypassAddresses = txtLocal.Text;
		}

		private void btnNewProfile_Click(object sender, System.EventArgs e)
		{
			createNewProfile();
		}

		private void cboNIC_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			loadNICProfile( _NICName );
			loadCurrentSetting( _NICName );			
		}

		private void MainForm_Closing(object sender, System.ComponentModel.CancelEventArgs e)
		{
			saveProfiles();
		}
		
		private void btnClose_Click(object sender, System.EventArgs e)
		{
			close();
		}
		
		private void btnActivate_Click(object sender, System.EventArgs e)
		{
			applyProfile();
		}

		private void MainForm_Load(object sender, System.EventArgs e)
		{
			loadApp();
		}

		private void chkDHCP_CheckedChanged(object sender, System.EventArgs e)
		{
			bool allowIP = !chkDHCP.Checked;
			txtIP.Enabled = txtSubnet.Enabled = txtGateway.Enabled = txtDNS.Enabled = allowIP;
			_CurrentNICProfile.UseDHCP = chkDHCP.Checked;
		}

		#endregion				
	}
}