C#類庫

——ini檔案操作類

    在開發應用軟體時，ini檔案常用於軟體的相關配置，以下為ini檔案的相關結構及示例；ini檔案具有節（section）和鍵（key）兩個層級，節用”[]”包含，然後下一行為對應鍵名以及鍵值，在示例中，“[INFO]”為節，“Name”和“Age”為鍵名，“SWorld”和“0”為鍵值。

[section]
key=value

例：
[INFO]
Name=SWorld
Age=0

    類庫引用：

using System.IO;
using System.Runtime.InteropServices;
using
 
 System.Text;

/// <summary>
/// ini檔案操作類
/// </summary>
public class IniHelper
{
    #region 動態連結庫呼叫
    /// <summary>
    /// 呼叫動態連結庫讀取值
    /// </summary>
    /// <param name="lpAppName">ini節名</param>
    /// <param name="lpKeyName">ini鍵名</param>
    /// <param name="lpDefault">
 
預設值：當無對應鍵值，則返回該值。</param>
    /// <param name="lpReturnedString">結果緩衝區</param>
    /// <param name="nSize">結果緩衝區大小</param>
    /// <param name="lpFileName">ini檔案位置</param>
    /// <returns></returns>
    [DllImport("kernel32")]
    private static extern int GetPrivateProfileString
 
(
        string lpAppName,
        string lpKeyName,
        string lpDefault,
        StringBuilder lpReturnedString,
        int nSize,
        string lpFileName);

    /// <summary>
    /// 呼叫動態連結庫寫入值
    /// </summary>
    /// <param name="mpAppName">ini節名</param>
    /// <param name="mpKeyName">ini鍵名</param>
    /// <param name="mpDefault">寫入值</param>
    /// <param name="mpFileName">檔案位置</param>
    /// <returns>0：寫入失敗 1：寫入成功</returns>
    [DllImport("kernel32")]
    private static extern long WritePrivateProfileString(
        string mpAppName,
        string mpKeyName,
        string mpDefault,
        string mpFileName);
    #endregion

    /// <summary>
    /// 讀ini檔案
    /// </summary>
    /// <param name="section">節</param>
    /// <param name="key">鍵</param>
    /// <returns>返回讀取值</returns>
    public static string Ini_Read(string section, string key, string path)
    {
        StringBuilder stringBuilder = new StringBuilder(1024);                  //定義一個最大長度為1024的可變字串
        GetPrivateProfileString(section, key, "", stringBuilder, 1024, path);   //讀取INI檔案
        return stringBuilder.ToString();                                        //返回INI檔案的內容
    }

    /// <summary>
    /// 寫ini檔案
    /// </summary>
    /// <param name="section">節</param>
    /// <param name="key">鍵</param>
    /// <param name="iValue">待寫入值</param>
    public static void Ini_Write(string section, string key, string iValue, string path)
    {
        WritePrivateProfileString(section, key, iValue, path);    //寫入
    }

    /// <summary>
    /// 根據檔名建立檔案
    /// </summary>
    /// <param name="path">檔名稱以及路徑</param>
    public static void ini_creat(string path)
    {
        if (!File.Exists(path))                             //判斷是否存在相關檔案
        {
            FileStream _fs=File.Create(path);               //不存在則建立ini檔案
            _fs.Close();                                    //關閉檔案，解除佔用
        }
    }

    /// <summary>
    /// 刪除ini檔案中鍵
    /// </summary>
    /// <param name="section">節名稱</param>
    /// <param name="key">鍵名稱</param>
    /// <param name="path">ini檔案路徑</param>
    public static void Ini_Del_Key(string section,string key, string path)
    {
        WritePrivateProfileString(section, key, null, path);                          //寫入
    }

    /// <summary>
    /// 刪除ini檔案中節
    /// </summary>
    /// <param name="section">節名</param>
    /// <param name="path">ini檔案路徑</param>
    public static void Ini_Del_Section(string section, string path)
    {
        WritePrivateProfileString(section, null, null, path);                          //寫入
    }
}

#region INI操作類測試
string _str_path = Path.Combine(@"G:", "ini_test.ini");             //路徑
Console.WriteLine("————Create File:");
IniHelper.Ini_Create(_str_path);                                    //在G盤建立名為ini_test的ini檔案

Console.WriteLine("————Write Name:");
IniHelper.Ini_Write("INFO", "Name", "Test", _str_path);             //在路徑檔案中寫入節為“INFO”，鍵名為“Name”，鍵值為“SWorld”的資料
Console.WriteLine("————Write Age:");
IniHelper.Ini_Write("INFO", "Age", "0", _str_path);                 //在路徑檔案中寫入節為“INFO”，鍵名為“Age”，鍵值為“0”的資料

Console.WriteLine("————Read Name:");
string _str_Name = IniHelper.Ini_Read("INFO", "Name", _str_path);   //讀取Name
Console.WriteLine("Name:"+_str_Name);                               //列印Name
Console.WriteLine("————Read Age:");
string _str_Age = IniHelper.Ini_Read("INFO", "Age", _str_path);     //讀取Age
Console.WriteLine("Age:" + _str_Age);                               //列印Age

Console.WriteLine("————Update Name:");
IniHelper.Ini_Write("INFO", "Name", "SWorld", _str_path);           //更新資料
Console.WriteLine("————Read New Name:");
_str_Name = IniHelper.Ini_Read("INFO", "Name", _str_path);          //讀取Name
Console.WriteLine("Name:" + _str_Name);                             //列印Name

Console.WriteLine("————Delete Key Name:");
IniHelper.Ini_Del_Key("INFO", "Name", _str_path);                   //刪除鍵
Console.WriteLine("————Read Name And Age:");
_str_Name = IniHelper.Ini_Read("INFO", "Name", _str_path);          //讀取Name
Console.WriteLine("Name:" + _str_Name);                             //列印Name
_str_Age = IniHelper.Ini_Read("INFO", "Age", _str_path);            //讀取Age
Console.WriteLine("Age:" + _str_Age);                               //列印Age

Console.WriteLine("————Delete Section Info:");
IniHelper.Ini_Del_Section("INFO", _str_path);                       //刪除節
Console.WriteLine("————Read Name And Age:");
_str_Name = IniHelper.Ini_Read("INFO", "Name", _str_path);          //讀取Name
Console.WriteLine("Name:" + _str_Name);                             //列印Name
_str_Age = IniHelper.Ini_Read("INFO", "Age", _str_path);            //讀取Age
Console.WriteLine("Age:" + _str_Age);                               //列印Name
#endregion

結果：


【注意】：從結果可以看出，再次寫入鍵值會覆蓋原來鍵值，需要刪除對應的鍵或者節，則只需要將對應節或者鍵寫入null就行。