C# 配置文件ini操作类

// [ 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(1024);
            GetPrivateProfileString("CONFIG",key,"",s,1024,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", "123456");
            INIhelp.SetValue("呵呵", "123456");
            INIhelp.SetValue("数据库", "123456");
            INIhelp.SetValue("123", "123456");
            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("123");
            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(2048);
            GetPrivateProfileString(section, name, def, vRetSb, 2048, 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(256);
            GetPrivateProfileString(section, name, "", strSb, 256, 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", 89);
            Console.WriteLine(myIni.ReadString("System", "MainFormName", ""));
            Console.WriteLine(myIni.ReadString("DbServer", "DbFile", ""));
            myIni.WriteString("DbServer", "DbFile", @"E:Work	est2.db");
            Console.WriteLine(myIni.ReadString("DbServer", "DbServer", ""));
            Console.WriteLine(myIni.ReadString("DbServer", "DbFile", ""));