XML文件内容

xml操作代码示例：

using System.Collections;
using System.Data;
using System.Xml;
using System.Xml.XPath;

namespace xmltest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            XML xml = new XML(Application.StartupPath + "\config.xml");

            string[] attstr = { "mac|08:00:27:00:D8:DC", "ip|192.168.1.1" };
            string[] childstr = { "ip|192.168.1.1","name|BBQ"};

            xml.AddNodes("config", "ips", attstr,childstr);
        }
        public class XML
        {
            string XMLFileName = "";
            public XML(string xmlfilename)
            {
                XMLFileName = xmlfilename;
            }

            /// <summary>
            /// 添加一个带属性的节点，可带子节点(attstr为null时没有属性)
            /// </summary>
            /// <param name="findnodename">在哪个节点下添加新节点</param>
            /// <param name="creatnodename">新节点名称</param>
            /// <param name="attstr">新节点属性字符串数组</param>
            /// <param name="childinfostr">子节点属性字符串数组</param>
            public int AddNodes(string findnodename, string creatnodename, string[] attstr, string[] childinfostr)
            {
                try
                {
                    XmlDocument xml = new XmlDocument();
                    xml.Load(XMLFileName);

                    XmlNode ndroot = xml.SelectSingleNode(findnodename);

                    XmlElement nd = xml.CreateElement(creatnodename);

                    if (attstr != null)
                    {
                        for (int i = 0; i < attstr.Length; i++)
                        {
                            string[] every = attstr[i].Split('|');
                            nd.SetAttribute(every[0], every[1]);
                        }
                    }

                    ndroot.AppendChild(nd);

                    if (childinfostr != null)
                    {
                        for (int i = 0; i < childinfostr.Length; i++)
                        {
                            string[] infos = childinfostr[i].Split('|');
                            XmlElement xe = xml.CreateElement(infos[0]);
                            XmlText xt = xml.CreateTextNode(infos[1]);
                            nd.AppendChild(xe);
                            nd.LastChild.AppendChild(xt);
                        }
                    }

                    xml.Save(XMLFileName);
                    return 0;
                }
                catch (Exception ErrMsg)
                {
                    return 1;
                }
            }
        }
    }
}

示例说明：

XML xml = new XML(Application.StartupPath + "\config.xml");

//添加一个节点

string[] attstr = { "mac|08:00:27:00:D8:DC","ip|123"};

//给这个节点再添加子节点

string[] childstr = { "ip|192.168.1.1","name|BBQ"};

xml.AddNodes("config", "ips", attstr,childstr);//config是上级节点

运行结果如下：

注意：如果最后一个参数为null

xml.AddNodes("config", "ips", attstr, null);

则只添加父节点