<?xml version="1.0" encoding="utf-8" ?> <configuration> </configuration>
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using System;
using System.Xml;
using System.Configuration;
using System.Reflection;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Windows.Forms;
namespace Kommunikator
{
public class ConfigSettings
{
private ConfigSettings() { }
public static string ReadSetting(string key)
{
bool vErg;
vErg = ConfigFileExist();
if (vErg = false)
CreateConfigFile();
return ConfigurationSettings.AppSettings[key];
}
public static void WriteSetting(string key, string value)
{
// load config document for current assembly
XmlDocument doc = loadConfigDocument();
// retrieve appSettings node
XmlNode node = doc.SelectSingleNode("//appSettings");
if (node == null)
throw new InvalidOperationException("appSettings section not found in config file.");
try
{
// select the 'add' element that contains the key
XmlElement elem = (XmlElement)node.SelectSingleNode(string.Format("//add[@key='{0}']", key));
if (elem != null)
{
// add value for key
elem.SetAttribute("value", value);
}
else
{
// key was not found so create the 'add' element
// and set it's key/value attributes
elem = doc.CreateElement("add");
elem.SetAttribute("key", key);
elem.SetAttribute("value", value);
node.AppendChild(elem);
}
doc.Save(getConfigFilePath());
}
catch
{
throw;
}
}
public static void RemoveSetting(string key)
{
// load config document for current assembly
XmlDocument doc = loadConfigDocument();
// retrieve appSettings node
XmlNode node = doc.SelectSingleNode("//appSettings");
try
{
if (node == null)
throw new InvalidOperationException("appSettings section not found in config file.");
else
{
// remove 'add' element with coresponding key
node.RemoveChild(node.SelectSingleNode(string.Format("//add[@key='{0}']", key)));
doc.Save(getConfigFilePath());
}
}
catch (NullReferenceException e)
{
throw new Exception(string.Format("The key {0} does not exist.", key), e);
}
}
private static XmlDocument loadConfigDocument()
{
XmlDocument doc = null;
try
{
doc = new XmlDocument();
doc.Load(getConfigFilePath());
return doc;
}
catch (System.IO.FileNotFoundException e)
{
throw new Exception("No configuration file found.", e);
}
}
private static string getConfigFilePath()
{
return Assembly.GetExecutingAssembly().Location + ".config";
}
//Überprüft ob es eine Config-Datei schon gibt
public static bool ConfigFileExist()
{
string vConfigPfad;
vConfigPfad = getConfigFilePath();
if (File.Exists(vConfigPfad))
{
return true;
}
else return false;
}
//Erstellt eine leere Config-Datei
public static void CreateConfigFile()
{
XmlWriter vConfig = XmlWriter.Create(getConfigFilePath());
//Prolog erzeugen
vConfig.WriteStartDocument();
vConfig.WriteStartElement("configuration");
vConfig.WriteElementString("appSettings","");
vConfig.WriteEndElement();
vConfig.WriteEndDocument();
vConfig.Close();
}
}
}
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