using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;
using System.IO;
 
namespace Alarm.Plugins.Speech
{
    class Settings
    {
        private string xmlFile;
        private XmlDocument xmldoc = new XmlDocument();
 
        /// <summary>
        /// Constructor for xml manager
        /// </summary>
        /// <param name="xmlFile">File name of the xml file</param>
        public Settings(string xmlFile)
        {
            this.xmlFile = xmlFile;
            initXml();
        }
 
        private bool initXml()
        {
            try
            {
                xmldoc.Load(xmlFile);
            }
            catch (Exception)
            {
                TextWriter writer = new StreamWriter(xmlFile);
                writer.WriteLine("<?xml version=\"1.0\" encoding=\"iso-8859-1\"?>");
                writer.WriteLine("<Settings>");
                writer.WriteLine("</Settings>");
                writer.Close();
            }
            return true;
        }
        /// <summary>
        /// Returns a setting from the settings.xml
        /// </summary>
        /// <param name="settingNode">Node to return value of</param>
        /// <returns>String: setting</returns>
        public string getSetting(string settingNode)
        {
            xmldoc.Load(xmlFile);
            XmlNodeList list = xmldoc.GetElementsByTagName("Settings");
            try
            {
                foreach (XmlNode searchNode in list)
                {
                    return searchNode.SelectSingleNode(settingNode.Replace(" ", "_")).InnerText;
                }
            }
            catch (Exception)
            {}
            return "";
        }
 
        /// <summary>
        /// Applies a setting to the xml file
        /// </summary>
        /// <param name="settingNode">Node in file to update</param>
        /// <param name="newValue">Value to update node to</param>
        /// <returns>true if successful</returns>
        public bool setSetting(string settingNode, string newValue)
 
       {
            xmldoc.Load(xmlFile);
            XmlNodeList list = xmldoc.SelectNodes("Settings");
            try
            {
                foreach (XmlNode searchNode in list)
                {
                    XmlNode node = searchNode.SelectSingleNode(settingNode.Replace(" ", "_"));
                    if (node == null)
                    {
                        XmlElement element = xmldoc.CreateElement(settingNode.Replace(" ", "_"));
                        xmldoc.DocumentElement.AppendChild(element);
                        searchNode.SelectSingleNode(settingNode.Replace(" ", "_")).InnerText = newValue;
                    }else
                        searchNode.SelectSingleNode(settingNode.Replace(" ", "_")).InnerText = newValue;
 
                }
            }
            catch (Exception)
            {return false;}
            xmldoc.Save(xmlFile);
            return true;
        }
    }
}

Settings mySettings = new Settings("Settings.xml");
 
mySettings.setSetting("setting_name", "setting_value");
String aSetting = mySettings.getSetting("setting_name");