An Introduction to LINQ to XML

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace ServerInfoStorageTool
{
    public partial class ServerInfoDialog : Form
    {
        public ServerInfoDialog()
        {
            InitializeComponent();
        }

        private void btnCancel_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void ServerInfoDialog_Load(object sender, EventArgs e)
        {
            List<string> serversList = ServerInfoService.GetAllServers();
            serversList.Add("New...");
            cbxServers.DataSource = serversList;
            this.PopulateServerInformation();
        }

        private void PopulateServerInformation()
        {
            ServerInfoService service = new ServerInfoService();
            service.SetServerInformation(cbxServers.SelectedItem.ToString());
            txtServer.Text = service.Address;
            txtUID.Text = service.UserId;
            txtPwd.Text = service.Password;
            txtSmartRmsDB.Text = service.DB1;
            txtMetabaseDB.Text = service.DB2;
            txtName.Text = service.DisplayName;
        }

        private void cbxServers_SelectedIndexChanged(object sender, EventArgs e)
        {
            this.PopulateServerInformation();
        }

        private void btnSave_Click(object sender, EventArgs e)
        {
            ServerInfoService service = new ServerInfoService();
            if ( !string.IsNullOrEmpty( txtServer.Text ) && !string.IsNullOrEmpty( txtUID.Text ) &&
                !string.IsNullOrEmpty( txtPwd.Text ) && !string.IsNullOrEmpty( txtSmartRmsDB.Text ) &&
                !string.IsNullOrEmpty( txtMetabaseDB.Text ) && !string.IsNullOrEmpty( txtName.Text ) )
            {
                service.Address = txtServer.Text;
                service.UserId = txtUID.Text;
                service.Password = txtPwd.Text;
                service.DB1 = txtSmartRmsDB.Text;
                service.DB2 = txtMetabaseDB.Text;
                service.DisplayName = txtName.Text;
                service.SaveConfig();
            }
        }

        public static void ShowErrorMessage( string message )
        {
            MessageBox.Show( message, "Server Info Storage Tool", MessageBoxButtons.OK, MessageBoxIcon.Error );
        }

        public static void ShowInformation( string message )
        {
            MessageBox.Show(message, "Server Info Storage Tool", MessageBoxButtons.OK, MessageBoxIcon.Information);
        }

    }
}