C#读写INI文件

INI文件格式

[StartUp]
StartKey=StartValue

[sectionName]
KeyName=KeyValue

操作

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.Diagnostics;
using Microsoft.Win32;
using System.IO;
using System.Runtime.InteropServices;

namespace UseINI
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            MessageBox.Show(GetPrivateProfileString("sectionName", "KeyName"));
        }
        /// <summary>
        ///  软件安装路径，以此exe所在的路径为准。
        /// </summary>
        string installDirectory = null;
        private string InstallDirectory
        {
            get
            {
                if (string.IsNullOrEmpty(installDirectory))
                {
                    string sPath = System.Reflection.Assembly.GetExecutingAssembly().Location;
                    installDirectory = Path.GetDirectoryName(sPath) + @"\";
                }
                return installDirectory;
            }
        }

        private string startUpIniFileName = null;
        public string StartUpIniFileName
        {
            get
            {
                if (string.IsNullOrEmpty(startUpIniFileName))
                {
                    startUpIniFileName = InstallDirectory + "StartUp.ini";
                }

                return startUpIniFileName;
            }
        }

        [DllImport("kernel32")]
        private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath);

        [DllImport("kernel32")]
        private static extern long WritePrivateProfileString(string section, string key, string value, string filePath);

        /// <summary>
        /// 从Ini文件获取数据
        /// </summary>
        /// <param name="section">应用程序</param>
        /// <param name="key">键的名称</param>
        /// <returns>键的值</returns>
        private string GetPrivateProfileString(string section, string key)
        {
            int nCapacity = 255;
            StringBuilder temp = new StringBuilder(nCapacity);
            int i = GetPrivateProfileString(section, key, "", temp, nCapacity, StartUpIniFileName);

            if (i < 0)
                return "";

            return temp.ToString();
        }


        /// <summary>
        /// 向Ini文件中写入值
        /// </summary>
        /// <param name="section">应用程序</param>
        /// <param name="key">键的名称</param>
        /// <param name="value">键的值</param>
        /// <returns>执行成功为True，失败为False。</returns>
        public long WritePrivateProfileString(string section, string key, string value)
        {
            if (section.Trim().Length <= 0 || key.Trim().Length <= 0 || value.Trim().Length <= 0)
                return 0;

            return WritePrivateProfileString(section, key, value, StartUpIniFileName);
        }
    }
}

源码下载：http://revit.5d6d.com/thread-1044-1-1.html