以前vs03项目中用到一个类：读写config文件配置信息

using System;
using System.Xml;
using System.IO;

namespace DataManager
{
    /**//// <summary>
    /// 修改和读取上传属性的方法
    /// </summary>
    public class Config
    {
        private string fileName = "";
        private XmlDocument xmlDoc = new  XmlDocument();
        private XmlNode appnode = null;

        public Config(string filePath)
        {    
            fileName = filePath;
            
            xmlDoc.Load(fileName);
            XmlElement root = xmlDoc.DocumentElement;
            
            for(int i = 0; i < root.ChildNodes.Count; i++)
            {
                if(root.ChildNodes[i].Name.ToLower() == "appsettings")
                {
                    appnode = root.ChildNodes[i];
                    break;
                }                
            }
        }

        写 void SetConfig(string key, string Value)#region 写 void SetConfig(string key, string Value)
        /**//// <summary>
        /// 写
        /// </summary>
        /// <param name="key"></param>
        /// <param name="Value"></param>
        public void SetConfig(string key, string Value)
        {    
            bool blnFound = false;
            key = key.ToLower();
            foreach(XmlNode node in appnode.ChildNodes)
            {    
                if(node.Name.ToLower() == "add")
                {
                    if(node.Attributes.GetNamedItem("key").Value.ToLower() == key)
                    {
                        node.Attributes.GetNamedItem("value").Value = Value;
                        blnFound = true;
                        break;
                    }
                }                    
            }

            if(!blnFound)
            {
                XmlNode childnode = xmlDoc.CreateNode(XmlNodeType.Element, "add","");

                XmlAttribute attr ;
                
                attr = xmlDoc.CreateAttribute("key");
                attr.Value = key;
                childnode.Attributes.Append(attr);

                attr = xmlDoc.CreateAttribute("value");
                attr.Value = Value;
                childnode.Attributes.Append(attr);

                appnode.AppendChild(childnode);
            }
            xmlDoc.Save(fileName);
        }
        #endregion 

        读string GetConfig(string key)#region 读string GetConfig(string key)
        /**//// <summary>
        /// 读
        /// </summary>
        /// <param name="key"></param>
        public string GetConfig(string key)
        {
            string noteValue = "";
            key = key.ToLower();
            foreach(XmlNode node in appnode.ChildNodes)
            {    
                if(node.Name.ToLower() == "add")
                {
                    if(node.Attributes.GetNamedItem("key").Value.ToLower() == key)
                    {
                        noteValue = node.Attributes.GetNamedItem("value").Value;
                        break;
                    }
                }                    
            }
            return noteValue;
        }
        #endregion
    }
}

对应的config文件为：

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <appSettings>        
        <add key="key1" value="1"/>
        <add key="key2" value="0"/>
    </appSettings>  
</configuration>

应用示例如下：

Config cf = new Config(Application.ExecutablePath + ".config");

string key1Value = cf.GetConfig("key1");//get
key1Value += "key1 has been Edited";
cf.SetConfig("key1", key1Value);//set

现在VS2005当然也可以用，不过05提供了更好的读写方法~