C#读写Ini文件

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Collections.Specialized;
using System.IO;

namespace EstartManage
{
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);
/// <summary>
/// 构造函数，初始化文件名
/// </summary>
/// <param name="AFileName"></param>
public IniFiles(string AFileName)
{

FileInfo fileInfo = new FileInfo(AFileName);
// 判断文件是否存在
if ((!fileInfo.Exists))
{
//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("#=====================");
sw.Close();
}

catch
{
throw (new ApplicationException("Ini文件不存在"));
}
}
//必须是完全路径
FileName = fileInfo.FullName;
}
/// <summary>
/// 写文件
/// </summary>
/// <param name="Section"></param>
/// <param name="Ident"></param>
/// <param name="Value"></param>
public void WriteString(string Section, string Ident, string Value)
{
if (!WritePrivateProfileString(Section, Ident, Value, FileName))
{

throw (new ApplicationException("写Ini文件出错"));
}
}
/// <summary>
/// 读字符串
/// </summary>
/// <param name="Section"></param>
/// <param name="Ident"></param>
/// <param name="Default"></param>
/// <returns></returns>
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();
}

/// <summary>
/// 读整数
/// </summary>
/// <param name="Section"></param>
/// <param name="Ident"></param>
/// <param name="Default"></param>
/// <returns></returns>
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;
}
}

/// <summary>
/// 写整数
/// </summary>
/// <param name="Section"></param>
/// <param name="Ident"></param>
/// <param name="Value"></param>
public void WriteInteger(string Section, string Ident, int Value)
{
WriteString(Section, Ident, Value.ToString());
}

/// <summary>
/// 读布尔值
/// </summary>
/// <param name="Section"></param>
/// <param name="Ident"></param>
/// <param name="Default"></param>
/// <returns></returns>
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;
}
}

/// <summary>
/// 写Bool值
/// </summary>
/// <param name="Section"></param>
/// <param name="Ident"></param>
/// <param name="Value"></param>
public void WriteBool(string Section, string Ident, bool Value)
{
WriteString(Section, Ident, Convert.ToString(Value));
}

/// <summary>
/// 从Ini文件中，将指定的Section名称中的所有Ident添加到列表中
/// </summary>
/// <param name="Section"></param>
/// <param name="Idents"></param>
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;
}
}
}
}
/// <summary>
/// 读取所有的Sections的名称
/// </summary>
/// <param name="SectionList"></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"></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, ReadString(Section, key, ""));

}
}
/// <summary>
/// 读取指定的Section的所有Value到列表中
/// </summary>
/// <param name="Section"></param>
/// <param name="Values"></param>
/// <param name="splitString"></param>
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());

//}
}
/// <summary>
/// 清除某个Section
/// </summary>
/// <param name="Section"></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"></param>
/// <param name="Ident"></param>
public void DeleteKey(string Section, string Ident)
{
WritePrivateProfileString(Section, Ident, null, FileName);
}
/// <summary>
/// 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。
/// </summary>
public 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"></param>
/// <param name="Ident"></param>
/// <returns></returns>
public bool ValueExists(string Section, string Ident)
{
//
StringCollection Idents = new StringCollection();
ReadSection(Section, Idents);
return Idents.IndexOf(Ident) > -1;
}

/// <summary>
/// 确保资源的释放
/// </summary>
~IniFiles()
{
UpdateFile();
}
}

}