using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Collections.Specialized;

using System.IO;

using System.Runtime.InteropServices;

using System.Windows.Forms;

namespace test{

    /// <summary>

    /// IniFiles的类

    /// </summary>

    public class IniFiles

    {

        public string FileName; //INI文件名

        //string path   =   System.IO.Path.Combine(Application.StartupPath,"pos.ini");

        //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 IniFiles(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))

                //文件不存在，建立文件

                System.IO.StreamWriter sw = new System.IO.StreamWriter(AFileName, false, System.Text.Encoding.Default);

                try

                {

                    sw.Write("#表格配置档案");

                    sw.Close();

                }

                catch

                {

                    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;

        }

        //写INI文件

        public void WriteString(string Section, string Ident, string Value)

        {

            if (!WritePrivateProfileString(Section, Ident, Value, FileName))

            {

                throw (new ApplicationException("写Ini文件出错"));

            }

        }

        //读取INI文件指定

        public string ReadString(string Section, string Ident, string Default)

        {

            Byte[] Buffer = new Byte[];

            int bufLen = GetPrivateProfileString(Section, Ident, Default, Buffer, Buffer.GetUpperBound(), 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().GetString(Buffer);

            s = s.Substring(, bufLen);

            return s.Trim();

        }

        //读整数

        public int ReadInteger(string Section, string Ident, int Default)

        {

            string intStr = ReadString(Section, Ident, Convert.ToString(Default));

            try

            {

                return Convert.ToInt32(intStr);

            }

            catch (Exception ex)

            {

                Console.WriteLine(ex.Message);

                return Default;

            }

        }

        //写整数

        public void WriteInteger(string Section, string Ident, int Value)

        {

            WriteString(Section, Ident, Value.ToString());

        }

        //读布尔

        public bool ReadBool(string Section, string Ident, bool Default)

        {

            try

            {

                return Convert.ToBoolean(ReadString(Section, Ident, Convert.ToString(Default)));

            }

            catch (Exception ex)

            {

                Console.WriteLine(ex.Message);

                return Default;

            }

        }

        //写Bool

        public void WriteBool(string Section, string Ident, bool Value)

        {

            WriteString(Section, Ident, Convert.ToString(Value));

        }

        //从Ini文件中，将指定的Section名称中的所有Ident添加到列表中

        public void ReadSection(string Section, StringCollection Idents)

        {

            Byte[] Buffer = new Byte[];

            //Idents.Clear();

            int bufLen = GetPrivateProfileString(Section, null, null, Buffer, Buffer.GetUpperBound(), FileName);

            //对Section进行解析

            GetStringsFromBuffer(Buffer, bufLen, Idents);

        }

        private void GetStringsFromBuffer(Byte[] Buffer, int bufLen, StringCollection Strings)

        {

            Strings.Clear();

            if (bufLen != )

            {

                int start = ;

                for (int i = ; i < bufLen; i++)

                {

                    if ((Buffer[i] == ) && ((i - start) > ))

                    {

                        String s = Encoding.GetEncoding().GetString(Buffer, start, i - start);

                        Strings.Add(s);

                        start = i + ;

                    }

                }

            }

        }

        //从Ini文件中，读取所有的Sections的名称

        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[];

            int bufLen = ;

            bufLen = GetPrivateProfileString(null, null, null, Buffer,

            Buffer.GetUpperBound(), FileName);

            GetStringsFromBuffer(Buffer, bufLen, SectionList);

        }

        //读取指定的Section的所有Value到列表中

        public void ReadSectionValues(string Section, NameValueCollection Values)

        {

            StringCollection KeyList = new StringCollection();

            ReadSection(Section, KeyList);

            Values.Clear();

            foreach (string key in KeyList)

            {

                Values.Add(key, ReadString(Section, key, ""));

            }

        }

        /**/

        ////读取指定的Section的所有Value到列表中，

        //public void ReadSectionValues(string Section, NameValueCollection Values,char splitString)

        //{　 string sectionValue;

        //　　string[] sectionValueSplit;

        //　　StringCollection KeyList = new StringCollection();

        //　　ReadSection(Section, KeyList);

        //　　Values.Clear();

        //　　foreach (string key in KeyList)

        //　　{

        //　　　　sectionValue=ReadString(Section, key, "");

        //　　　　sectionValueSplit=sectionValue.Split(splitString);

        //　　　　Values.Add(key, sectionValueSplit[0].ToString(),sectionValueSplit[1].ToString());

        //　　}

        //}

        //清除某个Section

        public void EraseSection(string Section)

        {

            if (!WritePrivateProfileString(Section, null, null, FileName))

            {

                throw (new ApplicationException("无法清除Ini文件中的Section"));

            }

        }

        //删除某个Section下的键

        public void DeleteKey(string Section, string Ident)

        {

            WritePrivateProfileString(Section, Ident, 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。

        public void UpdateFile()

        {

            WritePrivateProfileString(null, null, null, FileName);

        }

        //检查某个Section下的某个键值是否存在

        public bool ValueExists(string Section, string Ident)

        {

            StringCollection Idents = new StringCollection();

            ReadSection(Section, Idents);

            return Idents.IndexOf(Ident) > -;

        }

        //确保资源的释放

        ~IniFiles()

        {

            UpdateFile();

        }

    }

}