.NET修改xml文件

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using i_salesDAL;
using i_salesModels;
using i_salesBLL;
using MySql.Data.MySqlClient;
using System.Xml;
public partial class kf_total : System.Web.UI.Page
{
private XmlDocument xmlDoc;
public int gold
{
get { return V_companyManager.GetGoldNum(); }
}
public int silver
{
get { return V_companyManager.GetSilverNum(); }
}
public int AA
{
get { return V_companyManager.GetAANum(); }
}
public int B
{
get { return V_companyManager.GetBNum(); }
}
public int C
{
get { return V_companyManager.GetCNum(); }
}
public int D
{
get { return V_companyManager.GetDNum(); }
}
protected void Page_Load(object sender, EventArgs e)
{
UpdateElement();
lblcount.Text = "共有数据:"+(gold+silver).ToString()+"条";
}
//load xml file连接xml
private void LoadXml()
{
xmlDoc = new XmlDocument();
xmlDoc.Load(Server.MapPath("pie.xml"));
}
//修改xml节点里属性值
private void UpdateElement()
{
LoadXml();
XmlNodeList nodeList = xmlDoc.SelectSingleNode("pieData").ChildNodes;//获取pieData节点的所有子节点
foreach (XmlNode xn in nodeList)//遍历所有子节点
{
XmlElement xe = (XmlElement)xn;//将子节点类型转换为XmlElement类型
//gold
if (xe.GetAttribute("color") == "FFFF00")//如果color属性值为“gold”
{
//xe.SetAttribute("color", "");
//如果下面有子节点在下走
XmlNodeList nls = xe.ChildNo