// [ DllImport ( "kernel32" ) ] 
//private static extern long WritePrivateProfileString ( string section , string key , string val , string filePath ) ; 
//参数说明：section：INI文件中的段落；key：INI文件中的关键字；val：INI文件中关键字的数值；filePath：INI文件的完整的路径和名称。 
//C＃申明INI文件的读操作函数GetPrivateProfileString（）： 
//[ DllImport ( "kernel32" ) ] 
//private static extern int GetPrivateProfileString ( string section , string key , string def , StringBuilder retVal , int size , string filePath ) ; 
//参数说明：section：INI文件中的段落名称；key：INI文件中的关键字；
//def：无法读取时候时候的缺省数值；retVal：读取数值；size：数值的大小；filePath：INI文件的完整路径和名称。
//

//第一种，简单操作类

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Runtime.InteropServices;

using System.IO;

namespace ConsoleApplication1

{

    class INIhelp

    {

        [DllImport("kernel32")]

        private static extern long WritePrivateProfileString(string section, string key, string val, string filepath);

        [DllImport("kernel32")]

        private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retval, int size, string filePath);

        //ini文件名称

        private static string inifilename = "Config.ini";

        //获取ini文件路径

        private static string inifilepath = Directory.GetCurrentDirectory() + "\\" + inifilename;

        public static string GetValue(string key)

        {

            StringBuilder s = new StringBuilder();

            GetPrivateProfileString("CONFIG",key,"",s,,inifilepath);

            return s.ToString();

        }

        public static void SetValue(string key,string value)

        {

            try

            {

                WritePrivateProfileString("CONFIG", key, value, inifilepath);

            }

            catch (Exception ex)

            {

                throw ex;

            }

        }

    }

}

// 使用

static void Main(string[] args)

        {

            INIhelp.SetValue("data", "abcdefg");

            INIhelp.SetValue("哈哈", "");

            INIhelp.SetValue("呵呵", "");

            INIhelp.SetValue("数据库", "");

            INIhelp.SetValue("", "");

            Console.WriteLine("写入完成");

            Console.ReadLine();

            string s = INIhelp.GetValue("data");

            Console.WriteLine(s);

            string a = INIhelp.GetValue("哈哈");

            Console.WriteLine(a);

            string b = INIhelp.GetValue("");

            Console.WriteLine(b);

            Console.ReadLine();
　　　　　　 //删除，设置为null即可
 　　　　　　INIhelp.SetValue("1", null);

        }

//第二种 完全操作类

using System;

using System.Collections.Generic;

using System.Linq;

using System.Runtime.InteropServices;

using System.Text;

namespace MSFramework.Common

{

    /// <summary>

    /// ini文件类

    /// </summary>

    public class IniFile

    {

        private string m_FileName;

        public string FileName

        {

            get { return m_FileName; }

            set { m_FileName = value; }

        }

        [DllImport("kernel32.dll")]

        private static extern int GetPrivateProfileInt(

            string lpAppName,

            string lpKeyName,

            int nDefault,

            string lpFileName

            );

        [DllImport("kernel32.dll")]

        private static extern int GetPrivateProfileString(

            string lpAppName,

            string lpKeyName,

            string lpDefault,

            StringBuilder lpReturnedString,

            int nSize,

            string lpFileName

            );

        [DllImport("kernel32.dll")]

        private static extern int WritePrivateProfileString(

            string lpAppName,

            string lpKeyName,

            string lpString,

            string lpFileName

            );

        /// <summary>

        /// 构造函数

        /// </summary>

        /// <param name="aFileName">Ini文件路径</param>

        public IniFile(string aFileName)

        {

            this.m_FileName = aFileName;

        }

        /// <summary>

        /// 构造函数

        /// </summary>

        public IniFile()

        { }

        /// <summary>

        /// [扩展]读Int数值

        /// </summary>

        /// <param name="section">节</param>

        /// <param name="name">键</param>

        /// <param name="def">默认值</param>

        /// <returns></returns>

        public int ReadInt(string section, string name, int def)

        {

            return GetPrivateProfileInt(section, name, def, this.m_FileName);

        }

        /// <summary>

        /// [扩展]读取string字符串

        /// </summary>

        /// <param name="section">节</param>

        /// <param name="name">键</param>

        /// <param name="def">默认值</param>

        /// <returns></returns>

        public string ReadString(string section, string name, string def)

        {

            StringBuilder vRetSb = new StringBuilder();

            GetPrivateProfileString(section, name, def, vRetSb, , this.m_FileName);

            return vRetSb.ToString();

        }

        /// <summary>

        /// [扩展]写入Int数值，如果不存在 节-键，则会自动创建

        /// </summary>

        /// <param name="section">节</param>

        /// <param name="name">键</param>

        /// <param name="Ival">写入值</param>

        public void WriteInt(string section, string name, int Ival)

        {

            WritePrivateProfileString(section, name, Ival.ToString(), this.m_FileName);

        }

        /// <summary>

        /// [扩展]写入String字符串，如果不存在 节-键，则会自动创建

        /// </summary>

        /// <param name="section">节</param>

        /// <param name="name">键</param>

        /// <param name="strVal">写入值</param>

        public void WriteString(string section, string name, string strVal)

        {

            WritePrivateProfileString(section, name, strVal, this.m_FileName);

        }

        /// <summary>

        /// 删除指定的 节

        /// </summary>

        /// <param name="section"></param>

        public void DeleteSection(string section)

        {

            WritePrivateProfileString(section, null, null, this.m_FileName);

        }

        /// <summary>

        /// 删除全部 节

        /// </summary>

        public void DeleteAllSection()

        {

            WritePrivateProfileString(null, null, null, this.m_FileName);

        }

        /// <summary>

        /// 读取指定 节-键 的值

        /// </summary>

        /// <param name="section"></param>

        /// <param name="name"></param>

        /// <returns></returns>

        public string IniReadValue(string section, string name)

        {

            StringBuilder strSb = new StringBuilder();

            GetPrivateProfileString(section, name, "", strSb, , this.m_FileName);

            return strSb.ToString();

        }

        /// <summary>

        /// 写入指定值，如果不存在 节-键，则会自动创建

        /// </summary>

        /// <param name="section"></param>

        /// <param name="name"></param>

        /// <param name="value"></param>

        public void IniWriteValue(string section, string name, string value)

        {

            WritePrivateProfileString(section, name, value, this.m_FileName);

        }

    }

}

//使用

IniFile myIni = new IniFile(Environment.CurrentDirectory + "\\Config.ini");

            myIni.WriteInt("Tsection", "tName", );

            Console.WriteLine(myIni.ReadString("System", "MainFormName", ""));

            Console.WriteLine(myIni.ReadString("DbServer", "DbFile", ""));

            myIni.WriteString("DbServer", "DbFile", @"E:\Work\test2.db");

            Console.WriteLine(myIni.ReadString("DbServer", "DbServer", ""));

            Console.WriteLine(myIni.ReadString("DbServer", "DbFile", ""));