Retrieving CD Information from a remote Freedb database

#region COPYRIGHT (c) 2004 by Brian Weeres
/* Copyright (c) 2004 by Brian Weeres
 * 
 * Email: bweeres@protegra.com; bweeres@hotmail.com
 * 
 * Permission to use, copy, modify, and distribute this software for any
 * purpose is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * If you modify it then please indicate so. 
 *
 * The software is provided "AS IS" and there are no warranties or implied warranties.
 * In no event shall Brian Weeres and/or Protegra Technology Group be liable for any special, 
 * direct, indirect, or consequential damages or any damages whatsoever resulting for any reason 
 * out of the use or performance of this software
 * 
 */
#endregion
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Diagnostics;
using Freedb;

namespace FreedbDemo
{
	/// <summary>
	/// Summary description for DLGPreferences.
	/// </summary>
	public class DLGPreferences : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.ComboBox CBDefaultServer;
		private SiteCollection m_sites = null;





		// not bothing with private and public at this point
		public string UserName;
		public string HostName;
		public Site SelectedSite = null;
		private FreedbHelper m_freedb = null;
		
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.TextBox TBUserName;
		private System.Windows.Forms.TextBox TBHostName;
		private System.Windows.Forms.Button BTNOkay;
		private System.Windows.Forms.Button BTNCancel;


		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;


		public DLGPreferences(FreedbHelper helper)
		{
			m_freedb = helper;
			InitializeComponent();
			UserName = m_freedb.UserName;
			HostName = m_freedb.Hostname;
			this.TBUserName.Text = this.UserName;
			this.TBHostName.Text = this.HostName;
			SelectedSite = m_freedb.CurrentSite;

			try
			{
				Debug.Assert(m_freedb != null,"The FreedbHelper object is null. It must be intialized prior to calling this dialog." );
				//load up the sites

				string result = m_freedb.GetSites(Freedb.Site.PROTOCOLS.HTTP,out m_sites);
				if (result == FreedbHelper.ResponseCodes.CODE_210)
					PopulateCombo();
			}

			catch (Exception ex)
			{
				MessageBox.Show(ex.Message);
			}
		}



		private void PopulateCombo()
		{
			Site defaultSite = null;
			Site mainSite = null;
			foreach (Site site in m_sites )
			{
				int index = CBDefaultServer.Items.Add(site);

				//determine which site should be currently selected. 
				//Since we always retrieve the sites the site objects themselves will not be the same instance
				//so figure out which one matches our current site by comparing the url's 
				if (m_freedb.CurrentSite != null && site.GetUrl() == m_freedb.CurrentSite.GetUrl())
					defaultSite = site;

				// always figure out the main site because one of the other sites may be not listed anymore
				if (site.GetUrl() == FreedbHelper.MAIN_FREEDB_SITE)
					mainSite = site;
			}

			//set the currently selected one
			if (defaultSite != null)
				CBDefaultServer.SelectedItem = defaultSite;
			else
				CBDefaultServer.SelectedItem = mainSite;
		}


		/// <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.label1 = new System.Windows.Forms.Label();
			this.CBDefaultServer = new System.Windows.Forms.ComboBox();
			this.label2 = new System.Windows.Forms.Label();
			this.label3 = new System.Windows.Forms.Label();
			this.TBUserName = new System.Windows.Forms.TextBox();
			this.TBHostName = new System.Windows.Forms.TextBox();
			this.BTNOkay = new System.Windows.Forms.Button();
			this.BTNCancel = new System.Windows.Forms.Button();
			this.SuspendLayout();
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(8, 16);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(120, 23);
			this.label1.TabIndex = 0;
			this.label1.Text = "Select Default Server:";
			this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
			// 
			// CBDefaultServer
			// 
			this.CBDefaultServer.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
			this.CBDefaultServer.Location = new System.Drawing.Point(144, 16);
			this.CBDefaultServer.MaxDropDownItems = 15;
			this.CBDefaultServer.Name = "CBDefaultServer";
			this.CBDefaultServer.Size = new System.Drawing.Size(328, 21);
			this.CBDefaultServer.TabIndex = 1;
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(24, 48);
			this.label2.Name = "label2";
			this.label2.TabIndex = 2;
			this.label2.Text = "UserName:";
			this.label2.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
			// 
			// label3
			// 
			this.label3.Location = new System.Drawing.Point(24, 80);
			this.label3.Name = "label3";
			this.label3.TabIndex = 3;
			this.label3.Text = "HostName:";
			this.label3.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
			// 
			// TBUserName
			// 
			this.TBUserName.Location = new System.Drawing.Point(144, 48);
			this.TBUserName.Name = "TBUserName";
			this.TBUserName.Size = new System.Drawing.Size(328, 20);
			this.TBUserName.TabIndex = 4;
			this.TBUserName.Text = "textBox1";
			// 
			// TBHostName
			// 
			this.TBHostName.Location = new System.Drawing.Point(144, 80);
			this.TBHostName.Name = "TBHostName";
			this.TBHostName.Size = new System.Drawing.Size(328, 20);
			this.TBHostName.TabIndex = 5;
			this.TBHostName.Text = "textBox1";
			// 
			// BTNOkay
			// 
			this.BTNOkay.FlatStyle = System.Windows.Forms.FlatStyle.System;
			this.BTNOkay.Location = new System.Drawing.Point(163, 120);
			this.BTNOkay.Name = "BTNOkay";
			this.BTNOkay.TabIndex = 6;
			this.BTNOkay.Text = "Okay";
			this.BTNOkay.Click += new System.EventHandler(this.BTNOkay_Click);
			// 
			// BTNCancel
			// 
			this.BTNCancel.DialogResult = System.Windows.Forms.DialogResult.Cancel;
			this.BTNCancel.FlatStyle = System.Windows.Forms.FlatStyle.System;
			this.BTNCancel.Location = new System.Drawing.Point(267, 120);
			this.BTNCancel.Name = "BTNCancel";
			this.BTNCancel.TabIndex = 7;
			this.BTNCancel.Text = "Cancel";
			// 
			// DLGPreferences
			// 
			this.AcceptButton = this.BTNOkay;
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.CancelButton = this.BTNCancel;
			this.ClientSize = new System.Drawing.Size(504, 158);
			this.Controls.Add(this.BTNCancel);
			this.Controls.Add(this.BTNOkay);
			this.Controls.Add(this.TBHostName);
			this.Controls.Add(this.TBUserName);
			this.Controls.Add(this.label3);
			this.Controls.Add(this.label2);
			this.Controls.Add(this.CBDefaultServer);
			this.Controls.Add(this.label1);
			this.MaximizeBox = false;
			this.MinimizeBox = false;
			this.Name = "DLGPreferences";
			this.ShowInTaskbar = false;
			this.Text = "Preferences";
			this.ResumeLayout(false);

		}
		#endregion

		private void BTNOkay_Click(object sender, System.EventArgs e)
		{
			SelectedSite = (Site)this.CBDefaultServer.SelectedItem;
			UserName = this.TBUserName.Text;
			HostName = this.TBHostName.Text;
			this.DialogResult = DialogResult.OK;

		}



	}
}