C#-IniFiles文件配置连接数据库

public class IniFiles
    {
        public string inipath;

        //声明API函数

        /// <summary>
        /// 写操作
        /// </summary>
        /// <param name="section">节</param>
        /// <param name="key">键</param>
        /// <param name="val">值</param>
        /// <param name="filePath">文件路径</param>
        /// <returns></returns>
        [DllImport("kernel32")]
        private static extern long WritePrivateProfileString(string section, string key, string val, string filePath);

        /// <summary>
        /// 读操作
        /// </summary>
        /// <param name="section">节</param>
        /// <param name="key">键</param>
        /// <param name="def">未读取到的默认值</param>
        /// <param name="retVal">读取到的值</param>
        /// <param name="size">大小</param>
        /// <param name="filePath">文件路径</param>
        /// <returns></returns>
        [DllImport("kernel32")]
        private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath);

        /// <summary> 
        /// 构造方法 
        /// </summary> 
        /// <param name="INIPath">文件路径</param> 
        public IniFiles(string INIPath)
        {
            inipath = INIPath;
        }

        public IniFiles() { }

        /// <summary> 
        /// 写入INI文件 
        /// </summary> 
        /// <param name="Section">项目名称(如 [TypeName] )</param> 
        /// <param name="Key">键</param> 
        /// <param name="Value">值</param> 
        public void IniWriteValue(string Section, string Key, string Value)
        {
            WritePrivateProfileString(Section, Key, Value, this.inipath);
        }

        /// <summary> 
        /// 读出INI文件 
        /// </summary> 
        /// <param name="Section">项目名称(如 [TypeName] )</param> 
        /// <param name="Key">键</param> 
        public string IniReadValue(string Section, string Key)
        {
            StringBuilder temp = new StringBuilder(500);
            int i = GetPrivateProfileString(Section, Key, "", temp, 500, this.inipath);
            return temp.ToString();
        }


        /// <summary> 
        /// 验证文件是否存在 
        /// </summary> 
        /// <returns>布尔值</returns> 
        public bool ExistINIFile()
        {
            return File.Exists(inipath);
        }
    }