asp.net xml读取、写入示例代码

using System.Xml;
using System.Configuration;
 
private static XmlDocument xmldoc = new XmlDocument();
    private static string lujing = System.Web.HttpContext.Current.Server.MapPath("~/App_Data/ggmain.xml");
    public static void connxml()
    {
        xmldoc.Load(lujing);
}

//1，读取xml
    public static void savexml()
    {
        xmldoc.Save(lujing);
    }

//2，保存xml
 public static bool  updatexml(string id,string txt,string url ,string src)
    {
        connxml();
        XmlNodeList nodelist = xmldoc.SelectSingleNode("quanju").ChildNodes;
        foreach (XmlNode xn in nodelist)
        {
            XmlElement xe = (XmlElement)xn;
            if (xe.GetAttribute("id") == id)
            {
                XmlNodeList nls = xe.ChildNodes;
                foreach (XmlNode xn1 in nls)
                {
                    XmlElement xe2 = (XmlElement)xn1;
                    if (xe2.Name == "text")
                    {
                        xe2.InnerText =txt;
                        continue;
                    }
                }
                XmlNodeList nls1 = xe.ChildNodes;
                foreach (XmlNode xn1 in nls1)
                {
                    XmlElement xe2 = (XmlElement)xn1;
                    if (xe2.Name == "url")
                    {
                        xe2.InnerText = url;
                        continue;
                    }
                }
                XmlNodeList nls2 = xe.ChildNodes;
                foreach (XmlNode xn1 in nls2)
                {
                    XmlElement xe2 = (XmlElement)xn1;
                    if (xe2.Name == "src")
                    {
                        xe2.InnerText = src;
                        continue;
                    }
                }
                savexml();
                return true;
            }

        }
        savexml();
        return false;
    }

//3，修改xml中数据
public static bool addxml(string id ,string type, string rootsub, string[] creArr,string[] setArr)
    {
        try
        {
            connxml();
            XmlNode root = xmldoc.SelectSingleNode("quanju");
            XmlElement xe1 = xmldoc.CreateElement(rootsub);
            xe1.SetAttribute(type, id);

            for (int i = 0; i < creArr.Length; i++)
            {
                XmlElement xesub1 = xmldoc.CreateElement(creArr[i]);
                xesub1.InnerXml = setArr[i];
                xe1.AppendChild(xesub1);
            }
            root.AppendChild(xe1);
            savexml();
          
        }
        catch (Exception e)
        {
            return false;
        }
        finally
        {
           
        }
        return true;
    }

//4，添加xml中字段
public static bool delxml(string type,string val)
    {
        try
        {
            connxml();
            XmlNodeList nodelist = xmldoc.SelectSingleNode("quanju").ChildNodes;
            foreach (XmlNode xn in nodelist)
            {
                XmlElement xe = (XmlElement)xn;

                if (xe.GetAttribute(type) == val)
                {
                    xe.RemoveAll();                    
                }
            }
            savexml();
        }
        catch (Exception e)
        {
            return false;
        }
        return true;
}