C#的XML操作

一、读取web.config的appSettings与connectionStrings。

using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;

namespace PaoTiao.Common
{
    /// <summary>
    /// 读取web.config的appSettings与connectionStrings
    /// </summary>
    public class PTXml
    {
        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="xmlPath">xml文档物理路径</param>
        public PTXml(string xmlPath)
        {
            this.doc = new XmlDocument();
            this.doc.Load(xmlPath);
            this.root = doc.DocumentElement;
        }

        private XmlDocument doc;
        private XmlElement root;

        /// <summary>
        /// 获取web.config中appSettings中节点值
        /// </summary>
        /// <param name="key">key不区分大小写</param>
        /// <returns></returns>
        public string GetAppSetting(string key)
        {
            string s = "";

            foreach (XmlNode node1 in this.root.ChildNodes)
            {
                if (node1.Name == "appSettings")
                {
                    foreach (XmlNode node2 in node1.ChildNodes)
                    {
                        if (node2.Name == "add")
                        {
                            if (node2.Attributes["key"].Value.ToLower() == key.ToLower())
                            {
                                s = node2.Attributes["value"].Value;
                            }
                        }
                    }
                }
            }

            return s;
        }

        /// <summary>
        /// 获取web.config中connectionStrings中节点值
        /// </summary>
        /// <param name="name">name不区分大小写</param>
        /// <returns></returns>
        public string GetConnectionString(string name)
        {
            string s = "";

            foreach (XmlNode node1 in this.root.ChildNodes)
            {
                if (node1.Name == "connectionStrings")
                {
                    foreach (XmlNode node2 in node1.ChildNodes)
                    {
                        if (node2.Name == "add")
                        {
                            if (node2.Attributes["name"].Value.ToLower() == name.ToLower())
                            {
                                s = node2.Attributes["connectionString"].Value;
                            }
                        }
                    }
                }
            }

            return s;
        }

    }//end class
}//end namespace