ini 文件操作

做了一些修改，见类：

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Collections.Specialized;using System.Runtime.InteropServices;using System.IO;namespace INIStream{    /// <summary>    /// 一个模仿Delphi的TIniFile的类    /// 修订：1.1 修正了对中文系统的支持。    /// 1.2 增加了UpdateFile方法,实现了对Win9x的支持    /// 1.3 增加了读写布尔，整数的操作    /// 1.4 修正了写Ini虽然成功，但是会抛出异常的错误    /// 1.5 ReadString返回的是Trim后的字符串    /// 1.6 统一并扩大了读写缓冲区的大小    /// </summary>    public class IniFile    {        public string FileName; //INI文件名        //声明读写INI文件的API函数        [DllImport("kernel32")]        private static extern bool WritePrivateProfileString(string section, string key, string val, string filePath);        [DllImport("kernel32")]        private static extern int GetPrivateProfileString(string section, string key, string def, byte[] retVal, int size, string filePath);        //类的构造函数，传递INI文件名        public IniFile(string AFileName)        {            // 判断文件是否存在            FileInfo fileInfo = new FileInfo(AFileName);            //Todo:搞清枚举的用法            if ((!fileInfo.Exists)) //|| (FileAttributes.Directory in fileInfo.Attributes))                throw (new ApplicationException("Ini文件不存在"));            //必须是完全路径，不能是相对路径            FileName = fileInfo.FullName;        }        #region 读                /// <summary>        /// 读取INI文件指定        /// </summary>        /// <param name="Section">节点</param>        /// <param name="key">键</param>        /// <param name="Default">默认值</param>        /// <returns></returns>        private string Read(string Section, string key, string Default)        {            Byte[] Buffer = new Byte[65535];            int bufLen = GetPrivateProfileString(Section, key, "", Buffer, Buffer.GetUpperBound(0), FileName);            //必须设定0（系统默认的代码页）的编码方式，否则无法支持中文            string s = Encoding.GetEncoding(0).GetString(Buffer);            s = s.Substring(0, bufLen);            return s.Trim();        }        public string ReadString(string Section, string key) {            return Read(Section, key, "");        }        /// <summary>        /// 读整数        /// </summary>        /// <param name="Section">节点</param>        /// <param name="key">键</param>        /// <returns></returns>        public int ReadInteger(string Section, string key)        {            int Default = -1;            string intStr = Read(Section, key, Default.ToString());            try            {                return Convert.ToInt32(intStr);            }            catch (Exception ex)            {                Console.WriteLine(ex.Message);                return Default;            }        }        /// <summary>        /// 读布尔        /// </summary>        /// <param name="Section">节点</param>        /// <param name="key">键</param>        /// <returns></returns>        public bool ReadBool(string Section, string key)        {            bool Default = false;            try            {                return Convert.ToBoolean(Read(Section, key, Convert.ToString(Default)));            }            catch (Exception ex)            {                Console.WriteLine(ex.Message);                return Default;            }        }        /// <summary>        /// 从Ini文件中，将指定的Section名称中的所有key添加到列表中        /// </summary>        /// <param name="Section">节点</param>        /// <param name="keys">集合</param>        public void ReadSection(string Section, StringCollection keys)        {            Byte[] Buffer = new Byte[16384];            //keys.Clear();            int bufLen = GetPrivateProfileString(Section, null, null, Buffer, Buffer.GetUpperBound(0),            FileName);            //对Section进行解析            GetStringsFromBuffer(Buffer, bufLen, keys);        }        /// <summary>        /// 从Ini文件中，读取所有的Sections的名称        /// </summary>        /// <param name="SectionList">节点集合</param>        public void ReadSections(StringCollection SectionList)        {            //Note:必须得用Bytes来实现，StringBuilder只能取到第一个Section            byte[] Buffer = new byte[65535];            int bufLen = 0;            bufLen = GetPrivateProfileString(null, null, null, Buffer,            Buffer.GetUpperBound(0), FileName);            GetStringsFromBuffer(Buffer, bufLen, SectionList);        }        /// <summary>        /// 读取指定的Section的所有Value到列表中        /// </summary>        /// <param name="Section">节点</param>        /// <param name="Values"></param>        public void ReadSectionValues(string Section, NameValueCollection Values)        {            StringCollection KeyList = new StringCollection();            ReadSection(Section, KeyList);            Values.Clear();            foreach (string key in KeyList)            {                Values.Add(key, Read(Section, key, ""));            }        }        #endregion        #region 写        /// <summary>        /// 写INI文件        /// </summary>        /// <param name="Section">节点</param>        /// <param name="key">键</param>        /// <param name="Value">值</param>        public void WriteValue(string Section, string key, string Value)        {            if (!WritePrivateProfileString(Section, key, Value, FileName))            {                // Todo:抛出自定义的异常                throw (new ApplicationException("写Ini文件出错"));            }        }        #endregion                private void GetStringsFromBuffer(Byte[] Buffer, int bufLen, StringCollection Strings)        {            Strings.Clear();            if (bufLen != 0)            {                int start = 0;                for (int i = 0; i < bufLen; i++)                {                    if ((Buffer[i] == 0) && ((i - start) > 0))                    {                        String s = Encoding.GetEncoding(0).GetString(Buffer, start, i - start);                        Strings.Add(s);                        start = i + 1;                    }                }            }        }                /// <summary>        /// 清除某个Section        /// </summary>        /// <param name="Section">节点</param>        public void EraseSection(string Section)        {            //            if (!WritePrivateProfileString(Section, null, null, FileName))            {                throw (new ApplicationException("无法清除Ini文件中的Section"));            }        }        /// <summary>        /// 删除某个Section下的键        /// </summary>        /// <param name="Section">节点</param>        /// <param name="key">键</param>        public void DeleteKey(string Section, string key)        {            WritePrivateProfileString(Section, key, null, FileName);        }        //Note:对于Win9X，来说需要实现UpdateFile方法将缓冲中的数据写入文件        //在Win NT, 2000和XP上，都是直接写文件，没有缓冲，所以，无须实现UpdateFile        //执行完对Ini文件的修改之后，应该调用本方法更新缓冲区。        private void UpdateFile()        {            WritePrivateProfileString(null, null, null, FileName);        }        /// <summary>        /// 检查某个Section下的某个键值是否存在        /// </summary>        /// <param name="Section">节点</param>        /// <param name="key">键</param>        /// <returns></returns>        public bool ValueExists(string Section, string key)        {            StringCollection keys = new StringCollection();            ReadSection(Section, keys);            return keys.IndexOf(key) > -1;        }        //确保资源的释放        ~IniFile()        {            UpdateFile();        }    }}