读写INI文件操作类

详情介绍：http://zh.wikipedia.org/wiki/INI%E6%96%87%E4%BB%B6

示例：

下面是一个虚拟的程序，其INI文件有两个小节，前面的小节是用来设置拥有者的信息，而后面的小节是用来设置数据库的位置。前面的注解记载谁最后编辑此文件，而后面的注解记录为何不使用域名而是使用IP地址。

[owner]
name=John Doe
organization=Acme Products
 
[database]
server=192.0.2.42 ; use IP address in case network name resolution is not working
port=143
file = "acme payroll.dat"

IniHelper 类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;

namespace SingleStore.Code
{
    public class IniHelper
    {


        // 声明INI文件的写操作函数 WritePrivateProfileString()
        [DllImport("kernel32")]
        private static extern long WritePrivateProfileString(string section, string key, string val, string filePath);

        // 声明INI文件的读操作函数 GetPrivateProfileString()
        [DllImport("kernel32")]
        private static extern int GetPrivateProfileString(string section, string key, string def, System.Text.StringBuilder retVal, int size, string filePath);

        //获取ini文件的路径
        private string sPath = null;
        public IniHelper(string path)
        {
            this.sPath = path;
        }

        /// <summary>
        /// 写入INI文件
        /// </summary>
        /// <param name="section">配置节</param>
        /// <param name="key">键名</param>
        /// <param name="value">键值</param>
        public void WriteValue(string section, string key, string value)
        {
            // section=配置节，key=键名，value=键值，path=路径
            WritePrivateProfileString(section, key, value, sPath);
        }

        /// <summary>
        /// 读取INI文件配置节下的键
        /// </summary>
        /// <param name="section"></param>
        /// <param name="key"></param>
        /// <returns></returns>
        public string ReadValue(string section, string key)
        {
            // 每次从ini中读取多少字节
            StringBuilder temp = new StringBuilder(255);
            // section=配置节，key=键名，temp=上面，path=路径
            GetPrivateProfileString(section,key,"",temp,255,sPath);
            return temp.ToString();
        }
    }
}

Form窗体调用

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using SingleStore.Code;

namespace SingleStore
{
    public partial class Login : Form
    {
        public Login()
        {
            InitializeComponent();

            string IniPath = Directory.GetCurrentDirectory();

            //写入ini
            IniHelper ini = new IniHelper(IniPath + "/config.ini");
            ini.WriteValue("StoreShop", "userName", "admin");
            ini.WriteValue("StoreShop", "pwd", "admin");
            ini.WriteValue("StoreShop", "isRePwd", "0");

            //读取ini
            string ispwd = ini.ReadValue("StoreShop", "isRePwd");
            string xis = "";
            if (ispwd == "0")
            {
                xis = "是";
            }
            else
            {
                xis = "否";
            }
            MessageBox.Show("用户名：" + ini.ReadValue("StoreShop", "userName") + "
" +
                "密码：" + ini.ReadValue("StoreShop", "pwd") + "
" +
                "是否记住密码：" + xis);
        }
    }
}