Biegral Blog

参考文章：http://www.cnblogs.com/wayfarer/archive/2004/07/16/24783.html

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

namespace ConsoleApplication1
{
    // INI文件操作类
    class IniFileHelper
    {
        string strIniFilePath;  // ini配置文件路径

        // 返回0表示失败，非0为成功
        [DllImport("kernel32", CharSet = CharSet.Auto)]
        private static extern long WritePrivateProfileString(string section, string key,string val, string filePath);

        // 返回取得字符串缓冲区的长度
        [DllImport("kernel32", CharSet = CharSet.Auto)]
        private static extern long GetPrivateProfileString(string section, string key, string strDefault, StringBuilder retVal, int size, string filePath);

        [DllImport("Kernel32.dll", CharSet = CharSet.Auto)]
        public static extern int GetPrivateProfileInt(string section, string key, int nDefault, string filePath);

        /// <summary>
        /// 无参构造函数
        /// </summary>
        /// <returns></returns>
        public IniFileHelper()
        {
            this.strIniFilePath = Directory.GetCurrentDirectory() + "\\test.ini";
        }


        /// <summary>
        /// 有参构造函数
        /// </summary>
        /// <param name="strIniFilePath">ini配置文件路径</param>
        /// <returns></returns>
        public IniFileHelper(string strIniFilePath)
        {
            if (strIniFilePath != null)
            {
                this.strIniFilePath = strIniFilePath;
            }
        }


        /// <summary>
        /// 获取ini配置文件中的字符串
        /// </summary>
        /// <param name="section">节名</param>
        /// <param name="key">键名</param>
        /// <param name="strDefault">默认值</param>
        /// <param name="retVal">结果缓冲区</param>
        /// <param name="size">结果缓冲区大小</param>
        /// <returns>成功true,失败false</returns>
        public bool GetIniString(string section, string key, string strDefault, StringBuilder retVal, int size)
        {
            long liRet = GetPrivateProfileString(section, key, strDefault, retVal, size, strIniFilePath);
            return (liRet >= 1);
        }


        /// <summary>
        /// 获取ini配置文件中的整型值
        /// </summary>
        /// <param name="section">节名</param>
        /// <param name="key">键名</param>
        /// <param name="nDefault">默认值</param>
        /// <returns></returns>
        public int GetIniInt(string section, string key, int nDefault)
        {
            return GetPrivateProfileInt(section, key, nDefault, strIniFilePath);
        }


        /// <summary>
        /// 往ini配置文件写入字符串
        /// </summary>
        /// <param name="section">节名</param>
        /// <param name="key">键名</param>
        /// <param name="val">要写入的字符串</param>
        /// <returns>成功true,失败false</returns>
        public bool WriteIniString(string section, string key, string val)
        {
            long liRet = WritePrivateProfileString(section, key, val, strIniFilePath);
            return (liRet != 0);
        }


        /// <summary>
        /// 往ini配置文件写入整型数据
        /// </summary>
        /// <param name="section">节名</param>
        /// <param name="key">键名</param>
        /// <param name="val">要写入的数据</param>
        /// <returns>成功true,失败false</returns>
        public bool WriteIniInt(string section, string key, int val)
        {
            return WriteIniString(section, key, val.ToString());
        }
    }
}

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使用示例：

IniFileHelper iniHelper = new IniFileHelper();

            iniHelper.WriteIniString("Server", "IP", "192.168.1.2");
            iniHelper.WriteIniInt("Log", "Enable", 1);

            StringBuilder strIP = new StringBuilder(32);    // 注意：此时容量是32，长度是0
            iniHelper.GetIniString("Server", "IP", "127.0.0.1", strIP, strIP.Capacity);
            Console.WriteLine(strIP.ToString());

            int iEnable = iniHelper.GetIniInt("Log", "Enable", -1);
            Console.WriteLine(iEnable.ToString());