C# ini文件辅助操作类

C# ini文件辅助操作类

INI文件就是扩展名为“ini”的文件。 在Windows体系中，INI文件的使用有许多，最重要的就是“System.ini”、“System32.ini”和“Win.ini”。 该文件首要寄存用户所做的挑选以及体系的各种参数。用户能够经过修改INI文件，来改动应用程序和体系的许多装备。

自从Windows 95的退出，在Windows体系中引入了注册表的概念，INI文件在Windows体系的位置就开始不断下滑，这是由于注册表的共同长处，使应用程序和体系都把许多参数和初始化信息放进了注册表中。但在某些场合，INI文件还具有其不可代替的位置。下面是一个INI文件C#操作辅助类

/// <summary>  
    /// INI文件操作类  
    /// </summary>  
    public class INI  
    {  
        public string iniFile { get; private set; }  
        /// <summary>  
        ///   
        /// </summary>  
        /// <param name="iniFile">文件地址</param>  
        public INI(string iniFile)  
        {  
            this.iniFile = iniFile;  
        }  
  
        #region WinAPI  
        [DllImport("kernel32")]  
        private static extern long WritePrivateProfileString(string section, string key, string val, string filePath);  
  
        [DllImport("Kernel32.dll")]  
        private extern static uint GetPrivateProfileStringA(string strAppName, string strKeyName, string sDefault, byte[] buffer, int nSize, string strFileName);  
        [DllImport("kernel32")]  
        private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath);  
        #endregion  
  
        /// <summary>  
        /// 写入内容  
        /// </summary>  
        /// <param name="section">节点</param>  
        /// <param name="key">键名</param>  
        /// <param name="value">键值</param>  
        /// <returns></returns>  
        public long Write(string section, string key, string value)  
        {  
            if (!FileExists()) { File.Create(iniFile); }  
            long data = WritePrivateProfileString(section, key, value, this.iniFile);  
            return data;  
        }  
  
        /// <summary>  
        /// 获取内容  
        /// </summary>  
        /// <param name="section">节点</param>  
        /// <param name="key">键名</param>  
        /// <returns></returns>  
        public string Get(string section, string key)  
        {  
            if (!FileExists()) { return null; }  
  
            StringBuilder temp = new StringBuilder(1000);  
            int value = GetPrivateProfileString(section, key, "", temp, 500, this.iniFile);  
            return temp.ToString();  
        }  
  
        /// <summary>  
        /// 获取节点下所有键  
        /// </summary>  
        /// <param name="section">节点</param>  
        /// <returns></returns>  
        public ArrayList Keys(string section)  
        {  
            if (!FileExists()) { return null; }  
            byte[] buffer = new byte[5120];  
            uint rel = GetPrivateProfileStringA(section, null, "", buffer, buffer.GetUpperBound(0), this.iniFile);  
            int iCnt, iPos;  
            ArrayList arrayList = new ArrayList();  
            string tmp;  
            if (rel > 0)  
            {  
                iCnt = 0; iPos = 0;  
                for (iCnt = 0; iCnt < rel; iCnt++)  
                {  
                    if (buffer[iCnt] == 0x00)  
                    {  
                        tmp = System.Text.ASCIIEncoding.Default.GetString(buffer, iPos, iCnt - iPos).Trim();  
                        iPos = iCnt + 1;  
                        if (tmp != "")  
                        {  
                            arrayList.Add(tmp);  
                        }  
                    }  
                }  
            }  
            return arrayList;  
        }  
  
        /// <summary>  
        /// 获取所有Sections  
        /// </summary>  
        /// <returns></returns>  
        public List<string> Sections()  
        {  
            List<string> result = new List<string>();  
            Byte[] buf = new Byte[65536];  
            uint len = GetPrivateProfileStringA(null, null, null, buf, buf.Length, iniFile);  
            int j = 0;  
            for (int i = 0; i < len; i++)  
                if (buf[i] == 0)  
                {  
                    result.Add(Encoding.Default.GetString(buf, j, i - j));  
                    j = i + 1;  
                }  
            return result;  
        }  
  
        /// <summary>  
        /// 删除节点 逐级删除  
        /// </summary>  
        public void Remove(string section, string key = null)  
        {  
            if (!string.IsNullOrEmpty(section) && !string.IsNullOrEmpty(section))  
            {  
                WritePrivateProfileString(section, key, null, this.iniFile);  
            }  
            else if (!string.IsNullOrEmpty(section) && string.IsNullOrEmpty(section))  
            {  
                WritePrivateProfileString(section, null, null, this.iniFile);  
            }  
        }  
  
        private bool FileExists()  
        {  
            return File.Exists(this.iniFile);  
        }  
    }