optionsform.cs

Windows Mobile用户签名程序

/*
	OptionsForm class
	--
	Allows user to specify settings. The settings are stored in XML .config file.
	Tries to initialize the server IP address to the server that has ActiveSync
	installed by looking up information from the registry.
*/

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Net;
using System.Reflection;


namespace PocketSignature
{
	/// <summary>
	/// Options form.
	/// </summary>
	public class OptionsForm : System.Windows.Forms.Form
	{
		private System.Windows.Forms.ComboBox listAdr1;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.ComboBox listAdr2;
		private System.Windows.Forms.ComboBox listAdr3;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.TextBox textPassword;
		private System.Windows.Forms.MainMenu mainMenu;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.PictureBox pictureBox1;
		private System.Windows.Forms.Label label4;
		private System.Windows.Forms.Label lblVersion;
		private System.Windows.Forms.ComboBox listAdr4;
	
		public OptionsForm()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			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()
		{
			System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(OptionsForm));
			this.listAdr1 = new System.Windows.Forms.ComboBox();
			this.label1 = new System.Windows.Forms.Label();
			this.listAdr2 = new System.Windows.Forms.ComboBox();
			this.listAdr3 = new System.Windows.Forms.ComboBox();
			this.listAdr4 = new System.Windows.Forms.ComboBox();
			this.label2 = new System.Windows.Forms.Label();
			this.textPassword = new System.Windows.Forms.TextBox();
			this.mainMenu = new System.Windows.Forms.MainMenu();
			this.label3 = new System.Windows.Forms.Label();
			this.pictureBox1 = new System.Windows.Forms.PictureBox();
			this.label4 = new System.Windows.Forms.Label();
			this.lblVersion = new System.Windows.Forms.Label();
			// 
			// listAdr1
			// 
			this.listAdr1.Location = new System.Drawing.Point(8, 104);
			this.listAdr1.Size = new System.Drawing.Size(48, 22);
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(8, 88);
			this.label1.Size = new System.Drawing.Size(152, 16);
			this.label1.Text = "Server IP address";
			// 
			// listAdr2
			// 
			this.listAdr2.Location = new System.Drawing.Point(66, 104);
			this.listAdr2.Size = new System.Drawing.Size(48, 22);
			// 
			// listAdr3
			// 
			this.listAdr3.Location = new System.Drawing.Point(124, 104);
			this.listAdr3.Size = new System.Drawing.Size(48, 22);
			// 
			// listAdr4
			// 
			this.listAdr4.Location = new System.Drawing.Point(184, 104);
			this.listAdr4.Size = new System.Drawing.Size(48, 22);
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(8, 144);
			this.label2.Size = new System.Drawing.Size(152, 16);
			this.label2.Text = "Encryption passphrase";
			// 
			// textPassword
			// 
			this.textPassword.Location = new System.Drawing.Point(8, 160);
			this.textPassword.Size = new System.Drawing.Size(224, 22);
			this.textPassword.Text = "";
			// 
			// label3
			// 
			this.label3.Font = new System.Drawing.Font("Tahoma", 9F, System.Drawing.FontStyle.Bold);
			this.label3.Location = new System.Drawing.Point(8, 8);
			this.label3.Size = new System.Drawing.Size(128, 20);
			this.label3.Text = "Pocket Signature";
			// 
			// pictureBox1
			// 
			this.pictureBox1.Image = ((System.Drawing.Image)(resources.GetObject("pictureBox1.Image")));
			this.pictureBox1.Location = new System.Drawing.Point(200, 8);
			this.pictureBox1.Size = new System.Drawing.Size(32, 32);
			// 
			// label4
			// 
			this.label4.Location = new System.Drawing.Point(8, 44);
			this.label4.Size = new System.Drawing.Size(224, 14);
			this.label4.Text = "Developed by Vertigo Software, Inc.";
			// 
			// lblVersion
			// 
			this.lblVersion.Location = new System.Drawing.Point(8, 28);
			this.lblVersion.Size = new System.Drawing.Size(176, 14);
			this.lblVersion.Text = "Version";
			// 
			// OptionsForm
			// 
			this.Controls.Add(this.lblVersion);
			this.Controls.Add(this.label4);
			this.Controls.Add(this.pictureBox1);
			this.Controls.Add(this.label3);
			this.Controls.Add(this.textPassword);
			this.Controls.Add(this.listAdr1);
			this.Controls.Add(this.label1);
			this.Controls.Add(this.listAdr2);
			this.Controls.Add(this.listAdr3);
			this.Controls.Add(this.listAdr4);
			this.Controls.Add(this.label2);
			this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
			this.Menu = this.mainMenu;
			this.MinimizeBox = false;
			this.Text = "Options";
			this.Closing += new System.ComponentModel.CancelEventHandler(this.OptionsForm_Closing);
			this.Load += new System.EventHandler(this.OptionsForm_Load);

		}
		#endregion

		//
		// events
		//
		
		private void OptionsForm_Load(object sender, System.EventArgs e)
		{
			// display version
			AssemblyName name = Assembly.GetExecutingAssembly().GetName();
			lblVersion.Text = string.Format("Version {0}.{1}.{2}",
				name.Version.Major,
				name.Version.Minor,
				name.Version.Build);
		
			// init fields with settings from config file
			LoadSettings();
		}

		private void OptionsForm_Closing(object sender, System.ComponentModel.CancelEventArgs e)
		{
			// save settings to config file
			SaveSettings();
		}


		//
		// helper methods
		//
		
		// save settings to config file
		private void SaveSettings()
		{
			// password
			Global.Settings.SetValue(
				SettingKeys.CryptPassphrase,
				textPassword.Text);

			// ip address
			Global.Settings.SetValue(SettingKeys.IpAddress,
				string.Format("{0}.{1}.{2}.{3}",
				listAdr1.SelectedIndex,
				listAdr2.SelectedIndex,
				listAdr3.SelectedIndex,
				listAdr4.SelectedIndex));				
		}

		// load settings from config file
		private void LoadSettings()
		{
			// crypt password
			textPassword.Text = Global.Settings.GetString(
				SettingKeys.CryptPassphrase);
				
			// init IP droplist values
			for (int i=0; i <= 255; i++)
			{
				listAdr1.Items.Add(i);
				listAdr2.Items.Add(i);
				listAdr3.Items.Add(i);
				listAdr4.Items.Add(i);
			}
			
			// ip address
			string adr = Global.Settings.GetString(SettingKeys.IpAddress);
				
			// if user has not specified an address, try to determine the 
			// ip address of the server (system running ActiveSync)
			if (adr == Global.Const.EmptyAddress)
				adr = GetDefaultAddress();

			try
			{
				// select values in drop lists
				string[] parts = adr.Split('.');
				if (parts.Length == 4)
				{
					listAdr1.SelectedIndex = Convert.ToInt32(parts[0]);
					listAdr2.SelectedIndex = Convert.ToInt32(parts[1]);
					listAdr3.SelectedIndex = Convert.ToInt32(parts[2]);
					listAdr4.SelectedIndex = Convert.ToInt32(parts[3]);
				}		
			}
			catch
			{
				// invalid ip address
			}
		}
		
		// returns ip address of system running ActiveSync
		private string GetDefaultAddress()
		{
			// registry path
			const string RegPath = @"Software\Microsoft\Windows CE Services\Partners";

			// first get current partner setting
			int curPartner = Registry.GetInt(
				Registry.RootKey.LocalMachine, RegPath, "PCur");

			// return empty address if info is not in the registry
			if (curPartner == 0)
				return Global.Const.EmptyAddress;

			// next, get host name for the partner
			string hostName = Registry.GetString(
				Registry.RootKey.LocalMachine,
				string.Format(@"{0}\P{1}", RegPath, curPartner), "PName");

			// return empty address if info is not in the registry
			if (hostName == "")
				return Global.Const.EmptyAddress;

			// finally, return the ip address of the host			
			return GetHostAddress(hostName);
		}
		
		// return ip address for the specified host
		private string GetHostAddress(string host)
		{
			string result = Global.Const.EmptyAddress;
			try
			{
				// get ip address for the host
				IPHostEntry entry = Dns.GetHostByName(host);
				if (entry != null)
					result = entry.AddressList[0].ToString();
			}
			catch
			{
				// could not resolve host
			}
			return result;
		}
	}
}