使用XML文件保存应用程序配置

private void Load()
{
      XmlDocument doc = new XmlDocument();
      doc.Load("MyXml.xml");
      //read the root node
      XmlNode root = doc.DocumentElement;
      Debug.Assert(root != null, "Setting file is not valid.");
      //read a node under a node with given node name
      XmlNode xn = root.SelectSingleNode("Database");
      Debug.Assert(xn != null, "Setting file is not valid.");
      XmlElement xe = (XmlElement)xn;
      Debug.Assert(xe.Attributes.Count > 0, "Setting file is not valid.");
      //read a attribute with a given attribute name, as <NodeName AttrName1="1" AttrName2="2" />
      string s = xe.GetAttribute("FileName");
      xn = root.SelectSingleNode("IgnoreFields");
     XmlNodeList xnl = xn.ChildNodes;
      foreach (XmlNode xnf in xnl)
      {
        xe = (XmlElement)xnf;
        AList.Add(xe.Attributes[0].Name, xe.Attributes[0].Value);
      }
}

    private void Save()
    {
      XmlDocument doc = new XmlDocument();
      doc.Load("MyXml.xml");
      XmlNode root = doc.DocumentElement;
      Debug.Assert(root != null, "Setting file is not valid.");
      XmlNode xn = root.SelectSingleNode("Database");
      Debug.Assert(xn != null, "Setting file is not valid.");
      XmlElement xe = (XmlElement)xn;
      Debug.Assert(xe.Attributes.Count > 0, "Setting file is not valid.");
      //write a attribute with a given attribute name, as <NodeName AttrName1="1" AttrName2="2" />
      xe.SetAttribute("FileName", "3");
      XmlNode xn = root.SelectSingleNode("Compared");
      Debug.Assert(xn != null, "Setting file is not valid.");
      XmlNode node = doc.CreateNode(XmlNodeType.Element, "Table", null);
      XmlElement xe = (XmlElement)node;
      xe.SetAttribute(StationName, "Y");
      xn.AppendChild(xe);
      doc.Save("MyXml.xml");
    }