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 Comm
{
/// <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[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();
}
}
}
[Section1]
KeyWord1 = Valuel
KeyWord2 = Value2
……
[Section2]
KeyWord3 = Value3
KeyWord4 = Value4
原文：http://www.cnblogs.com/xiarongrong/p/3886753.html