CLASSE DE GESTION DE FICHIERS INI

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

namespace MonEspaceDeNom
{
	/// <summary>
	/// Classe permettant de gérer les fichiers INI.
	/// </summary>
	public class Ini
	{
		// API Windows
		[DllImport("kernel32")]
		private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath);
    
		[DllImport("kernel32")]
		private static extern int GetPrivateProfileSection(string section, IntPtr lpReturnedString, int nSize, string lpFileName);

		[DllImport("kernel32")]
		private static extern int GetPrivateProfileSectionNames(IntPtr lpszReturnBuffer, int nSize, string lpFileName);

		[DllImport("kernel32")]
		private static extern int WritePrivateProfileSection(string section, string lpString, string lpFileName);

		[DllImport("kernel32")]
		private static extern int WritePrivateProfileString(string section, string key, string lpString, string lpFileName);

		private string m_pfileName;

		/// <summary>
		/// Obtient ou définit le chemin d'accès complet au fichier INI.
		/// </summary>
		public string Filename
		{
			get { return m_pfileName; }
			set { m_pfileName = value; }
		}
        
		/// <summary>
		/// Initialize une instance de <see cref="Ini"/>.
		/// </summary>
		/// <param name="lpFileName">Chemin d'accès complet au fichier INI.</param>
		public Ini(string lpFileName)
		{
			this.m_pfileName = lpFileName;
		}

		/// <summary>
		/// Supprime une section ainsi que toutes les valeurs qu'elle contient.
		/// </summary>
		/// <param name="section">Nom de la section.</param>
		public int RemoveSection(string section)
		{
			return WritePrivateProfileSection(section, null, m_pfileName);
		}

		/// <summary>
		/// Supprime une valeur.
		/// </summary>
		/// <param name="section">Nom de la section.</param>
		/// <param name="key">Nom de la valeur.</param>
		public int RemoveString(string section, string key)
		{
			return WritePrivateProfileString(section, key, null, m_pfileName);
		}

		/// <summary>
		/// Ecrit une valeur dans une section.
		/// </summary>
		/// <param name="section">Nom de la section.</param>
		/// <param name="key">Nom de la valeur.</param>
		/// <param name="lpString">Valeur.</param>
		public int WriteString(string section, string key, string lpString)
		{
			return WritePrivateProfileString(section, key, lpString, m_pfileName);
		}

		/// <summary>
		/// Obtient la valeur d'une section.
		/// </summary>
		/// <param name="section">Nom de la section.</param>
		/// <param name="key">Nom de la valeur.</param>
		public string ReadString(string section, string key)
		{
			const int bufferSize = 255;
			StringBuilder temp = new StringBuilder(bufferSize);
			GetPrivateProfileString(section, key, "", temp, bufferSize, m_pfileName);
			return temp.ToString();
		}

		/// <summary>
		/// Obtient l'ensemble des valeurs d'une section.
		/// </summary>
		/// <param name="section">Nom de la section.</param>
		public string[] ReadSection(string section)
		{
			const int bufferSize = 2048;

			StringBuilder returnedString = new StringBuilder();

			IntPtr pReturnedString = Marshal.AllocCoTaskMem(bufferSize);
			try
			{
				int bytesReturned = GetPrivateProfileSection(section, pReturnedString, bufferSize, m_pfileName);

				// bytesReturned -1 pour retirer le dernier \0
				for( int i = 0; i < bytesReturned-1; i++ )
					returnedString.Append((char)Marshal.ReadByte(new IntPtr((uint)pReturnedString + (uint)i)));
			}
			finally
			{
				Marshal.FreeCoTaskMem(pReturnedString);
			}

			string sectionData = returnedString.ToString();
			return sectionData.Split('\0');
		}

		/// <summary>
		/// Obtient le nom de toutes les sections.
		/// </summary>
		public string[] ReadSections()
		{
			const int bufferSize = 2048;

			StringBuilder returnedString = new StringBuilder();

			IntPtr pReturnedString = Marshal.AllocCoTaskMem(bufferSize);
			try
			{
				int bytesReturned = GetPrivateProfileSectionNames(pReturnedString, bufferSize, m_pfileName);

				// bytesReturned -1 pour retirer le dernier \0
				for( int i = 0; i < bytesReturned-1; i++ )
					returnedString.Append((char)Marshal.ReadByte(new IntPtr((uint)pReturnedString + (uint)i)));
			}
			finally
			{
				Marshal.FreeCoTaskMem(pReturnedString);
			}

			string sectionData = returnedString.ToString();
			return sectionData.Split('\0');
		}
	}
}