currency.cs

一个掌上电脑PPC用的汇率转换软件

using System;
using System.Drawing;
using System.Collections;
using System.Windows.Forms;
using System.Data;
using System.Reflection;
using System.Net;
using System.IO;
using System.Security;

namespace SmartCurrency
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private DataSet ds;
		private Hashtable ht;

		// DataSet Table, Columns and other strings
		private const string CURRENCY				= "Currency";
		private const string SYMBOL					= "Sym";
		private const string RATE					= "Rate";
		private const string folderPersonal			= @"\My Documents\Personal";
		private const string folderPrivat			= @"\My Documents\Privat";
		private const string currencyStore			= "CurrencyRates.xml";

		// MessageBox titles
		private const string unavailableWS			= "Web Service unavailable";
		private const string baseNotSet				= "Base currency unknown";
		private const string baseDeleted			= "Base currency deleted";
		private const string attentionPlease		= "Attention please";
		private const string attentionInitialize	= "Initializing list";
		private const string applicationError		= "Application error";
		private const string fileError				= "File error";
		private const string wrongFormat			= "Wrong format";
		
		// MessageBox messages
		private const string messageCheckNetwork	= "Please check your network connectivity!";
		private const string checkCheckBoxWS		= "Web Service access is disabled. Do you want to go online and check the corresponding Check-Box?";
		private const string messageBaseCurrency	= "Please select your preferred base currency";
		private const string messageBaseDeleted		= "Please select a new base currency and update your preferences";
		private const string messageCurrencyExists  = "The currency you selected, already exists in your preferences";
		private const string messageCreatePreferences = "In order to use this tool, please create your currency prefences";
		private const string messageUpdatePreferences = "Update your preferences!";
		private const string messageMyPreferences	= "My preferences (selected currencies)";
		private const string messageCheckYourInput	= "Please note, the input should consist of digits";
		private const string messageCheckYourInput2	= "The input provided is too large";

		private string currencyXmlFile;

		private DataView viewFrom;
		private DataView viewTo;
		private DataView viewBox;

		private System.Windows.Forms.TabControl tabControl1;
		private System.Windows.Forms.TabPage tabPage1;
		private System.Windows.Forms.TabPage tabPage2;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.ComboBox comboBoxCurr;
		private System.Windows.Forms.Button buttonAdd;
		private System.Windows.Forms.ListBox listBoxCurr;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Button buttonSave;
		private System.Windows.Forms.CheckBox checkBoxWS;
		private System.Windows.Forms.TextBox textBoxBase;
		private System.Windows.Forms.Button buttonBase;
		private System.Windows.Forms.Label label4;
		private System.Windows.Forms.Label label5;
		private System.Windows.Forms.ComboBox comboBoxFrom;
		private System.Windows.Forms.ComboBox comboBoxTo;
		private System.Windows.Forms.TextBox textBoxValue;
		private System.Windows.Forms.TextBox textBoxResult;
		private System.Windows.Forms.Button buttonConvert;
		private System.Windows.Forms.CheckBox checkBoxOff;
		private Microsoft.WindowsCE.Forms.InputPanel inputPanel1;
		private System.Windows.Forms.Label label6;
		private System.Windows.Forms.Label label7;
		private System.Windows.Forms.Button buttonRemove;
		private System.Windows.Forms.PictureBox pictureBoxWarning;
		private System.Windows.Forms.PictureBox pictureBox1;
		private System.Windows.Forms.Button buttonClear;
		private System.Windows.Forms.MainMenu mainMenu1;

		public Form1()
		{
			InitializeComponent();

			// Adjust personal/privat folder usage for offline store
			// Of course this is a localization issue and should be solved
			// in a more general manner (culture) 
			// *****************************************************
			checkPrivateFolders();

			// Creating the empty DataSet, the table and their columns
			// *******************************************************
			ds = new DataSet("MyCurrency");
			DataTable dt = new DataTable(CURRENCY);
			dt.Columns.Add(SYMBOL, typeof(string));
			dt.Columns.Add(RATE, typeof(double));

			// Set primary key on the table
			// *************************
			DataColumn[] key = new DataColumn[1];
			key[0] = dt.Columns[SYMBOL];
			dt.PrimaryKey = key;

			// Add/Integrate the table into the DataSet
			// ****************************************
			ds.Tables.Add(dt);
		}
		/// <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(Form1));
			this.mainMenu1 = new System.Windows.Forms.MainMenu();
			this.tabControl1 = new System.Windows.Forms.TabControl();
			this.tabPage1 = new System.Windows.Forms.TabPage();
			this.pictureBox1 = new System.Windows.Forms.PictureBox();
			this.label7 = new System.Windows.Forms.Label();
			this.label6 = new System.Windows.Forms.Label();
			this.checkBoxOff = new System.Windows.Forms.CheckBox();
			this.buttonConvert = new System.Windows.Forms.Button();
			this.textBoxResult = new System.Windows.Forms.TextBox();
			this.textBoxValue = new System.Windows.Forms.TextBox();
			this.label5 = new System.Windows.Forms.Label();
			this.label4 = new System.Windows.Forms.Label();
			this.comboBoxTo = new System.Windows.Forms.ComboBox();
			this.comboBoxFrom = new System.Windows.Forms.ComboBox();
			this.tabPage2 = new System.Windows.Forms.TabPage();
			this.pictureBoxWarning = new System.Windows.Forms.PictureBox();
			this.buttonRemove = new System.Windows.Forms.Button();
			this.buttonBase = new System.Windows.Forms.Button();
			this.textBoxBase = new System.Windows.Forms.TextBox();
			this.checkBoxWS = new System.Windows.Forms.CheckBox();
			this.buttonSave = new System.Windows.Forms.Button();
			this.label2 = new System.Windows.Forms.Label();
			this.listBoxCurr = new System.Windows.Forms.ListBox();
			this.buttonAdd = new System.Windows.Forms.Button();
			this.label1 = new System.Windows.Forms.Label();
			this.comboBoxCurr = new System.Windows.Forms.ComboBox();
			this.inputPanel1 = new Microsoft.WindowsCE.Forms.InputPanel();
			this.buttonClear = new System.Windows.Forms.Button();
			// 
			// tabControl1
			// 
			this.tabControl1.Controls.Add(this.tabPage1);
			this.tabControl1.Controls.Add(this.tabPage2);
			this.tabControl1.SelectedIndex = 0;
			this.tabControl1.Size = new System.Drawing.Size(240, 272);
			this.tabControl1.GotFocus += new System.EventHandler(this.tabControl1_GotFocus);
			this.tabControl1.SelectedIndexChanged += new System.EventHandler(this.tabControl1_SelectedIndexChanged);
			// 
			// tabPage1
			// 
			this.tabPage1.Controls.Add(this.buttonClear);
			this.tabPage1.Controls.Add(this.pictureBox1);
			this.tabPage1.Controls.Add(this.label7);
			this.tabPage1.Controls.Add(this.label6);
			this.tabPage1.Controls.Add(this.checkBoxOff);
			this.tabPage1.Controls.Add(this.buttonConvert);
			this.tabPage1.Controls.Add(this.textBoxResult);
			this.tabPage1.Controls.Add(this.textBoxValue);
			this.tabPage1.Controls.Add(this.label5);
			this.tabPage1.Controls.Add(this.label4);
			this.tabPage1.Controls.Add(this.comboBoxTo);
			this.tabPage1.Controls.Add(this.comboBoxFrom);
			this.tabPage1.Location = new System.Drawing.Point(4, 4);
			this.tabPage1.Size = new System.Drawing.Size(232, 246);
			this.tabPage1.Text = "Conversion";
			// 
			// pictureBox1
			// 
			this.pictureBox1.Image = ((System.Drawing.Image)(resources.GetObject("pictureBox1.Image")));
			this.pictureBox1.Location = new System.Drawing.Point(208, 4);
			this.pictureBox1.Size = new System.Drawing.Size(16, 16);
			// 
			// label7
			// 
			this.label7.Location = new System.Drawing.Point(116, 56);
			this.label7.Size = new System.Drawing.Size(48, 16);
			this.label7.Text = "Result:";
			// 
			// label6
			// 
			this.label6.Location = new System.Drawing.Point(116, 8);
			this.label6.Size = new System.Drawing.Size(72, 16);
			this.label6.Text = "Input: ";
			// 
			// checkBoxOff
			// 
			this.checkBoxOff.Checked = true;
			this.checkBoxOff.CheckState = System.Windows.Forms.CheckState.Checked;
			this.checkBoxOff.Location = new System.Drawing.Point(12, 104);
			this.checkBoxOff.Size = new System.Drawing.Size(96, 16);
			this.checkBoxOff.Text = "Stay offline";
			// 
			// buttonConvert
			// 
			this.buttonConvert.Location = new System.Drawing.Point(116, 96);
			this.buttonConvert.Size = new System.Drawing.Size(64, 24);
			this.buttonConvert.Text = "Convert";
			this.buttonConvert.Click += new System.EventHandler(this.buttonConvert_Click);
			// 
			// textBoxResult
			// 
			this.textBoxResult.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Bold);
			this.textBoxResult.Location = new System.Drawing.Point(116, 72);
			this.textBoxResult.ReadOnly = true;
			this.textBoxResult.Size = new System.Drawing.Size(96, 20);
			this.textBoxResult.Text = "";
			// 
			// textBoxValue
			// 
			this.textBoxValue.Location = new System.Drawing.Point(116, 24);
			this.textBoxValue.Size = new System.Drawing.Size(96, 20);
			this.textBoxValue.Text = "";
			// 
			// label5
			// 
			this.label5.Location = new System.Drawing.Point(12, 56);
			this.label5.Size = new System.Drawing.Size(80, 16);
			this.label5.Text = "To:";
			// 
			// label4
			// 
			this.label4.Location = new System.Drawing.Point(12, 8);
			this.label4.Size = new System.Drawing.Size(100, 16);
			this.label4.Text = "From:";
			// 
			// comboBoxTo
			// 
			this.comboBoxTo.Location = new System.Drawing.Point(12, 72);
			this.comboBoxTo.Size = new System.Drawing.Size(100, 21);
			this.comboBoxTo.SelectedValueChanged += new System.EventHandler(this.comboBoxTo_SelectedValueChanged);
			// 
			// comboBoxFrom
			// 
			this.comboBoxFrom.Location = new System.Drawing.Point(12, 24);
			this.comboBoxFrom.Size = new System.Drawing.Size(100, 21);
			this.comboBoxFrom.SelectedValueChanged += new System.EventHandler(this.comboBoxTo_SelectedValueChanged);
			// 
			// tabPage2
			// 
			this.tabPage2.Controls.Add(this.pictureBoxWarning);
			this.tabPage2.Controls.Add(this.buttonRemove);
			this.tabPage2.Controls.Add(this.buttonBase);
			this.tabPage2.Controls.Add(this.textBoxBase);
			this.tabPage2.Controls.Add(this.checkBoxWS);
			this.tabPage2.Controls.Add(this.buttonSave);
			this.tabPage2.Controls.Add(this.label2);
			this.tabPage2.Controls.Add(this.listBoxCurr);
			this.tabPage2.Controls.Add(this.buttonAdd);
			this.tabPage2.Controls.Add(this.label1);
			this.tabPage2.Controls.Add(this.comboBoxCurr);
			this.tabPage2.Location = new System.Drawing.Point(4, 4);
			this.tabPage2.Size = new System.Drawing.Size(232, 246);
			this.tabPage2.Text = "Options";
			// 
			// pictureBoxWarning
			// 
			this.pictureBoxWarning.Image = ((System.Drawing.Image)(resources.GetObject("pictureBoxWarning.Image")));
			this.pictureBoxWarning.Location = new System.Drawing.Point(208, 96);
			this.pictureBoxWarning.Size = new System.Drawing.Size(16, 16);
			this.pictureBoxWarning.Visible = false;
			// 
			// buttonRemove
			// 
			this.buttonRemove.Location = new System.Drawing.Point(108, 140);
			this.buttonRemove.Size = new System.Drawing.Size(68, 20);
			this.buttonRemove.Text = "Remove";
			this.buttonRemove.Click += new System.EventHandler(this.buttonRemove_Click);
			// 
			// buttonBase
			// 
			this.buttonBase.Location = new System.Drawing.Point(108, 116);
			this.buttonBase.Size = new System.Drawing.Size(68, 20);
			this.buttonBase.Text = "Set base";
			this.buttonBase.Click += new System.EventHandler(this.buttonBase_Click);
			// 
			// textBoxBase
			// 
			this.textBoxBase.Location = new System.Drawing.Point(180, 116);
			this.textBoxBase.Size = new System.Drawing.Size(44, 20);
			this.textBoxBase.Text = "";
			// 
			// checkBoxWS
			// 
			this.checkBoxWS.Location = new System.Drawing.Point(112, 68);
			this.checkBoxWS.Size = new System.Drawing.Size(112, 20);
			this.checkBoxWS.Text = "Use Web Service";
			// 
			// buttonSave
			// 
			this.buttonSave.Location = new System.Drawing.Point(108, 92);
			this.buttonSave.Size = new System.Drawing.Size(92, 20);
			this.buttonSave.Text = "Update list";
			this.buttonSave.Click += new System.EventHandler(this.buttonSave_Click);
			// 
			// label2
			// 
			this.label2.Font = new System.Drawing.Font("Microsoft Sans Serif", 9F, System.Drawing.FontStyle.Regular);
			this.label2.Location = new System.Drawing.Point(8, 48);
			this.label2.Size = new System.Drawing.Size(216, 20);
			this.label2.Text = "My preferences (selected currencies)";
			// 
			// listBoxCurr
			// 
			this.listBoxCurr.Location = new System.Drawing.Point(8, 68);
			this.listBoxCurr.Size = new System.Drawing.Size(96, 93);
			// 
			// buttonAdd
			// 
			this.buttonAdd.Location = new System.Drawing.Point(108, 20);
			this.buttonAdd.Size = new System.Drawing.Size(68, 20);
			this.buttonAdd.Text = "Add";
			this.buttonAdd.Click += new System.EventHandler(this.buttonAdd_Click);
			// 
			// label1
			// 
			this.label1.Font = new System.Drawing.Font("Microsoft Sans Serif", 9F, System.Drawing.FontStyle.Regular);
			this.label1.Location = new System.Drawing.Point(8, 4);
			this.label1.Size = new System.Drawing.Size(136, 16);
			this.label1.Text = "All available currencies";
			// 
			// comboBoxCurr
			// 
			this.comboBoxCurr.Location = new System.Drawing.Point(8, 20);
			this.comboBoxCurr.Size = new System.Drawing.Size(96, 21);
			this.comboBoxCurr.GotFocus += new System.EventHandler(this.comboBoxCurr_GotFocus);
			// 
			// inputPanel1
			// 
			this.inputPanel1.EnabledChanged += new System.EventHandler(this.inputPanel1_EnabledChanged);
			// 
			// buttonClear
			// 
			this.buttonClear.Location = new System.Drawing.Point(184, 48);
			this.buttonClear.Size = new System.Drawing.Size(28, 20);
			this.buttonClear.Text = "C";
			this.buttonClear.Click += new System.EventHandler(this.buttonClear_Click);
			// 
			// Form1
			// 
			this.Controls.Add(this.tabControl1);
			this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
			this.Menu = this.mainMenu1;
			this.Text = "Currency ";
			this.GotFocus += new System.EventHandler(this.Form1_GotFocus);
			this.Load += new System.EventHandler(this.Form1_Load);

		}
		#endregion

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

		private void buttonAdd_Click(object sender, System.EventArgs e)
		{
			WebServiceX.CurrencyConvertor ws = new WebServiceX.CurrencyConvertor();
			DataRow row = ds.Tables[CURRENCY].NewRow();
			row[SYMBOL] = comboBoxCurr.SelectedItem.ToString();
			if (ds.Tables[CURRENCY].Rows.Contains(row[SYMBOL]) == false)
			{
				if (checkBoxWS.Checked == true && textBoxBase.Text.Length != 0)
				{
					if (comboBoxCurr.SelectedItem.ToString() == textBoxBase.Text)
						row[RATE] = 1;
					else
						row[RATE] = ws.ConversionRate(getCurrency(textBoxBase.Text), getCurrency(comboBoxCurr.SelectedItem.ToString()));
				}
				else
				{
					raiseAttention(true);
					row[RATE] = 0;
				}

				try
				{
					ds.Tables[CURRENCY].Rows.Add(row);
					if (ds.Tables[CURRENCY].Rows.Count == 1)
					{
						// the first select currency will be the base currency
						textBoxBase.Text = listBoxCurr.Text;
					}	
				}
				catch (System.Data.ConstraintException)
				{
					MessageBox.Show(messageCurrencyExists, attentionPlease, MessageBoxButtons.OK, MessageBoxIcon.Asterisk, MessageBoxDefaultButton.Button1);
				}
			}
			else
				MessageBox.Show(messageCurrencyExists, attentionPlease, MessageBoxButtons.OK, MessageBoxIcon.Asterisk, MessageBoxDefaultButton.Button1);
			inputPanel1.Enabled = false;
		}

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