INI文件操作类

public class INIFileUtil
    {
        /// <summary>
        /// INI文件地址
        /// </summary>
        private string path;

        /// <summary>
        /// 初始化
        /// </summary>
        /// <param name="INIPath">路径</param>
        private INIFileUtil(string INIPath)
        {
            this.path = INIPath;
        }

        public static INIFileUtil LoadIniFile(string iniFile)
        {
            return new INIFileUtil(iniFile);
        }
        /// <summary>
        /// 构造函数
        /// </summary>
        private INIFileUtil()
        {
        }

        [DllImport("kernel32", EntryPoint = "WritePrivateProfileString")]
        private static extern long WritePrivateProfileString(string section, string key, string val, string filePath);
        [DllImport("kernel32", EntryPoint = "GetPrivateProfileString")]
        private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath);
        [DllImport("kernel32", EntryPoint = "GetPrivateProfileString")]
        private static extern int GetPrivateProfileString(string section, string key, string def, byte[] retVal, int size, string filePath);
        [DllImport("kernel32.dll", EntryPoint = "GetPrivateProfileSectionNames", CharSet = CharSet.Ansi)]
        private static extern int GetPrivateProfileSectionNames(IntPtr lpszReturnBuffer, int nSize, string filePath);
        [DllImport("KERNEL32.DLL ", EntryPoint = "GetPrivateProfileSection", CharSet = CharSet.Ansi)]
        private static extern int GetPrivateProfileSection(string lpAppName, byte[] lpReturnedString, int nSize, string filePath);


        /// <summary>
        /// 写INI文件
        /// </summary>
        /// <param name="Section">分组节点</param>
        /// <param name="Key">关键字</param>
        /// <param name="Value">值</param>
        public void IniWriteValue(string Section, string Key, string Value)
        {
            INIFileUtil.WritePrivateProfileString(Section, Key, Value, this.path);
        }

        /// <summary>
        ///  读取INI文件
        /// </summary>
        /// <param name="Section">分组节点</param>
        /// <param name="Key">关键字</param>
        /// <returns></returns>
        public string IniReadValue(string Section, string Key)
        {
            StringBuilder stringBuilder = new StringBuilder(255);
            INIFileUtil.GetPrivateProfileString(Section, Key, "", stringBuilder, 255, this.path);
            return stringBuilder.ToString();
        }

        /// <summary>
        /// 读取INI文件
        /// </summary>
        /// <param name="section">分组节点</param>
        /// <param name="key">关键字</param>
        /// <returns></returns>
        public byte[] IniReadValues(string section, string key)
        {
            byte[] array = new byte[255];
            INIFileUtil.GetPrivateProfileString(section, key, "", array, 255, this.path);
            return array;
        }

        /// <summary>
        /// 删除ini文件下所有段落
        /// </summary>
        public void ClearAllSection()
        {
            this.IniWriteValue(null, null, null);
        }

        /// <summary>
        /// 删除ini文件下指定段落下的所有键
        /// </summary>
        /// <param name="Section">指定段</param>
        public void ClearSection(string Section)
        {
            this.IniWriteValue(Section, null, null);
        }

        /// <summary>
        /// 读取一个ini里面所有的节
        /// </summary>
        /// <param name="sections"></param>
        /// <param name="path"></param>
        /// <returns></returns>
        public int GetAllSectionNames(out List<string> sections)
        {
            int MAX_BUFFER = 32767;
            IntPtr pReturnedString = Marshal.AllocCoTaskMem(MAX_BUFFER);
            int bytesReturned = GetPrivateProfileSectionNames(pReturnedString, MAX_BUFFER, this.path);
            if (bytesReturned == 0)
            {
                sections = new List<string>();
                return -1;
            }
            string local = Marshal.PtrToStringAnsi(pReturnedString, (int)bytesReturned).ToString();
            Marshal.FreeCoTaskMem(pReturnedString);
            //use of Substring below removes terminating null for split
            sections = local.Substring(0, local.Length - 1).Split('\0').ToList<string>();
            return 0;
        }

        /// <summary>
        /// 得到某个节点下面所有的key和value组合
        /// </summary>
        /// <param name="section"></param>
        /// <param name="keys"></param>
        /// <param name="values"></param>
        /// <param name="path"></param>
        /// <returns></returns>
        public int GetAllKeyValues(string section, out string[] keys, out string[] values)
        {
            byte[] b = new byte[65535];

            GetPrivateProfileSection(section, b, b.Length, this.path);
            string s = System.Text.Encoding.Default.GetString(b);
            string[] tmp = s.Split((char)0);
            ArrayList result = new ArrayList();
            foreach (string r in tmp)
            {
                if (r != string.Empty)
                    result.Add(r);
            }
            keys = new string[result.Count];
            values = new string[result.Count];
            for (int i = 0; i < result.Count; i++)
            {
                string[] item = result[i].ToString().Split(new char[] { '=' });
                if (item.Length == 2)
                {
                    keys[i] = item[0].Trim();
                    values[i] = item[1].Trim();
                }
                else if (item.Length == 1)
                {
                    keys[i] = item[0].Trim();
                    values[i] = "";
                }
                else if (item.Length == 0)
                {
                    keys[i] = "";
                    values[i] = "";
                }
            }
            return 0;
        }
    }