C#读写INI文件 C#读写INI文件的方法

using System;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;
using System.Collections;
using System.Collections.Specialized;
namespace wuyisky
{
 /// <summary>
 /// IniFiles的类
 /// </summary>
 public class IniFiles
 {
  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 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[65535];
   int bufLen = GetPrivateProfileString(Section, Ident, Default, 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();
  }
  //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[16384];
   //Idents.Clear();
   int bufLen = GetPrivateProfileString(Section, null, null, Buffer, Buffer.GetUpperBound(0),
     FileName);
   //对Section进行解析
   GetStringsFromBuffer(Buffer, bufLen, Idents);
  }
  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;
     }
    }
   }
  }
  //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[65535];
   int bufLen = 0;
   bufLen = GetPrivateProfileString(null, null, null, Buffer,
    Buffer.GetUpperBound(0), 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) > -1;
  }
  //确保资源的释放
  ~IniFiles()
  {
   UpdateFile();
  }
 }
}