ini文件在Win95以前比較盛行，之后由于出冊表等技術(shù)的出現(xiàn)，ini技術(shù)主鍵退居二線，不過對于一些小項目，讀寫ini文件還是很適用的。
Windows API提供了讀寫配置文件的操作，在C#程序中只要導(dǎo)入相應(yīng)的API即可。例如GetPrivateProfileString（）方法，在MSDN查得原型如下：
DWORD GetPrivateProfileString( LPCTSTR lpAppName, // section name LPCTSTR lpKeyName, // key name LPCTSTR lpDefault, // default string LPTSTR lpReturnedString, // destination buffer DWORD nSize, // size of destination buffer LPCTSTR lpFileName // initialization file name);
由于C#和C++數(shù)據(jù)類型不同，在導(dǎo)入win32 API時需要做相應(yīng)的轉(zhuǎn)換，并且要導(dǎo)入相關(guān)的類。如下所示：
[DllImport("kernel32")] private static extern int GetPrivateProfileString(string section, string key, string defVal, StringBuilder retVal, int size, string filePath);
同理導(dǎo)入另一個函數(shù)
[DllImport("kernel32")] private static extern long WritePrivateProfileString(string section, string key, string val, string filePath)在main函數(shù)測試如下：
using System;using System.Collections.Generic;using System.Linq;using System.Runtime.InteropServices;using System.Text;using System.Threading.Tasks; namespace DoingIni{ class Program { [DllImport("kernel32")] private static extern int GetPrivateProfileString(string section, string key, string defVal, StringBuilder retVal, int size, string filePath); [DllImport("kernel32")] private static extern long WritePrivateProfileString(string section, string key, string val, string filePath); /// <summary> /// 讀取INI文件 /// </summary> /// <param name="section">項目名稱(如 [section] )</param> /// <param name="skey">鍵</param> /// <param name="path">路徑</param> static string IniReadValue(string section, string skey, string path) { StringBuilder temp = new StringBuilder(500); int i = GetPrivateProfileString(section, skey, "", temp, 500, path); return temp.ToString(); } /// <summary> /// 寫入ini文件 /// </summary> /// <param name="section">項目名稱</param> /// <param name="key">鍵</param> /// <param name="value">值</param> /// <param name="path">路徑</param> static void IniWrite(string section, string key, string value, string path) { WritePrivateProfileString(section, key, value, path); } static void Main(string[] args) { IniWrite("上海", "東方明珠", "浦東新區(qū)", "f:/test.ini"); IniWrite("上海", "上海中心大廈", "浦東新區(qū)", "f:/test.ini"); IniWrite("湖南", "張家界景區(qū)", "張家界", "f:/test.ini"); IniWrite("湖南", "鳳凰古城", "吉首", "f:/test.ini"); IniWrite("湖北", "武當(dāng)山", "十堰", "f:/test.ini"); IniWrite("湖北", "黃鶴樓", "武昌", "f:/test.ini"); IniWrite("湖北", "古隆中", "襄陽", "f:/test.ini"); IniWrite("江蘇", "瘦西湖", "揚州", "f:/test.ini"); IniWrite("江蘇", "中山陵", "南京", "f:/test.ini"); IniWrite("上海", "城隍廟", "浦東新區(qū)", "f:/test.ini"); string str = IniReadValue("湖南", "鳳凰古城", "f:/test.ini"); Console.WriteLine(str); IniReadValue("上海", null, "f:/test.ini"); 刪除test.ini文件中A 段落中所有鍵(沒有鍵，也就沒有值了) //IniWrite("A", null, null, "f:/test.ini"); 刪除test.ini文件中所有段落 //IniWrite(null, null, null, "f:/test.ini"); Console.ReadKey(); } }}
