C# Ini文件操作实例_C#教程

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在开源中国看到的操作ini文件的,写的还不看,留着以后用

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();
    }
  }
}

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