.net中添加資料到XML的類代碼

using System;
using System.Xml;

/// <summary>
/// 控制XML檔案的操作
/// </summary>
public class xmlManager
{
    private XmlDocument xmlDoc;
    private string userid;
    private string name;
    private string password;
    private string phone;
    private string city;
 public xmlManager()
 {
 }
    public xmlManager(string myid,string myname,string mypass,string myphone,string mycity)
    {
        this.userid = myid;
        this.name = myname;
        this.password = mypass;
        this.phone = myphone;
        this.city = mycity;
    }
    /// <summary>
    /// 載入XML檔案的方法
    /// </summary>
    /// <param name="xmlfile">XML檔案路徑</param>
    private void LoadXml()
    {
        xmlDoc = new XmlDocument();
        xmlDoc.Load(System.Web.HttpContext.Current.Server.MapPath("XMLFile.xml"));
    }
    public void AddNode()
    {
        //載入文檔
        LoadXml();
        //選擇根節點
        XmlNode xmldocboot = xmlDoc.SelectSingleNode("userinfo");

        //開始添加節點及節點的屬性
        XmlElement ele = xmlDoc.CreateElement("user");
        XmlElement ele1 = xmlDoc.CreateElement("id");
        ele1.InnerText = userid;
        XmlElement ele2 = xmlDoc.CreateElement("name");
        ele2.InnerText = name;
        XmlElement ele3 = xmlDoc.CreateElement("password");
        ele3.InnerText = password;
        XmlElement ele4 = xmlDoc.CreateElement("phone");
        ele4.InnerText = phone;
        XmlElement ele5 = xmlDoc.CreateElement("city");
        ele5.InnerText = city;
        ele.AppendChild(ele1);
        ele.AppendChild(ele2);
        ele.AppendChild(ele3);
        ele.AppendChild(ele4);
        ele.AppendChild(ele5);

        //將節點儲存到根節點下
        xmldocboot.AppendChild(ele);
        //儲存XML檔案的修改-此處要注意，如果檔案儲存在系統硬碟，還要考慮使用者權限的問題。
        xmlDoc.Save(System.Web.HttpContext.Current.Server.MapPath("XMLFile.xml"));
    }

}
後台調用：

 //初始化XML操作類
        xmlManager myxml = new xmlManager(值1，值2，值3，...，);
        //執行添加命令
        myxml.AddNode();