INI文件读写类

INI就是扩展名为"INI"的文件,其实他本身是个文本文件,可以用记事本打工,主要存放的是用户所做的选择或系统的各种参数.
INI文件其实并不是普通的文本文件.它有自己的结构.由若干段落(SECTION)组成,在每个带括号的标题下面,是若干个以单个单词开头的关键字(KEYWORD)和一个等号,等号右边就是关键字的值(VALUE).例如:

[Section1]
    KeyWord1 = Value1
    KeyWord2 = Value2
    ...
[Section2]
    KeyWord3 = Value3
    KeyWord4 = Value4

    public class INIFile
    {
        public string path;

        public INIFile(string INIPath)
        {
            path = INIPath;
        }
        /// <summary>
        /// 写ini配置文件
        /// </summary>
        /// <param name="section">输入参数：段落(SECTION)</param>
        /// <param name="key">输入参数：关键字(KEYWORD)</param>
        /// <param name="val">输入参数：Key对应的值</param>
        /// <param name="filePath">输入参数：ini文件路径</param>
        /// <returns></returns>
        [DllImport("kernel32")]        
        private static extern long WritePrivateProfileString(string section, string key, string val, string filePath);

        /// <summary>
        /// 获取ini配置文件的某Section中Key的值(
        /// </summary>
        /// <param name="section">输入参数：段落(SECTION)</param>
        /// <param name="key">输入参数：关键字(KEYWORD)</param>
        /// <param name="def"></param>
        /// <param name="retVal">输入参数：获取的Key对应的值（字符串）</param>
        /// <param name="size">输入参数：Key对应的值的大小</param>
        /// <param name="filePath">输入参数：ini文件的路径</param>
        /// <returns>返回：</returns>
        [DllImport("kernel32")]
        private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath);


        /// <summary>
        /// 获取ini配置文件的某Section中Key的值
        /// </summary>
        /// <param name="section">输入参数：段落(SECTION)</param>
        /// <param name="key">输入参数：关键字(KEYWORD)</param>
        /// <param name="defVal"></param>
        /// <param name="retVal">输入参数：获取的Key对应的值（Byte[]）</param>
        /// <param name="size">输入参数：Key对应的值的大小</param>
        /// <param name="filePath">输入参数：ini文件的路径</param>
        /// <returns>返回：</returns>
        [DllImport("kernel32")]
        private static extern int GetPrivateProfileString(string section, string key, string defVal, Byte[] retVal, int size, string filePath);


        /// <summary>
        /// 写INI文件
        /// </summary>
        /// <param name="Section">输入参数：段落(SECTION)</param>
        /// <param name="Key">输入参数：关键字(KEYWORD)</param>
        /// <param name="Value">输入参数：Key对应的值（字符串）</param>
        public void IniWriteValue(string Section, string Key, string Value)
        {
            WritePrivateProfileString(Section, Key, Value, this.path);
        }

        /// <summary>
        /// 读取INI文件-返回字符串
        /// </summary>
        /// <param name="Section">输入参数：段落(SECTION)</param>
        /// <param name="Key">输入参数：关键字(KEYWORD)</param>
        /// <returns></returns>
        public string IniReadValue(string Section, string Key)
        {
            StringBuilder temp = new StringBuilder(255);
            int i = GetPrivateProfileString(Section, Key, "", temp, 255, this.path);
            return temp.ToString();
        }
        /// <summary>
        /// 读取INI文件-返回Byte[]
        /// </summary>
        /// <param name="section">输入参数：段落(SECTION)</param>
        /// <param name="key">输入参数：关键字(KEYWORD)</param>
        /// <returns></returns>
        public byte[] IniReadValues(string section, string key)
        {
            byte[] temp = new byte[255];
            int i = GetPrivateProfileString(section, key, "", temp, 255, this.path);
            return temp;

        }


        /// <summary>
        /// 删除ini文件下所有段落
        /// </summary>
        public void ClearAllSection()
        {
            IniWriteValue(null, null, null);
        }
        /// <summary>
        /// 删除ini文件下personal段落下的所有键
        /// </summary>
        /// <param name="Section"></param>
        public void ClearSection(string Section)
        {
            IniWriteValue(Section, null, null);
        }
    }