代码如下：
using System;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;
namespace Kingsense.eMenu.Common
{
/// <summary>
/// 配置文件（*.int）操作类
/// </summary>
public class RWIniFile
{
#region 声明读写配置文件的API函数
/// <summary>
/// 写配置文件 www.jb200.com
/// </summary>
/// <param name="section">节(如果该节不存在，则创建它)</param>
/// <param name="key">键(该键不存在于指定的部分，它被创建。 如果这个参数为NULL，则整节被删除)</param>
/// <param name="val">值(如果这个参数为NULL,则删除该键)</param>
/// <param name="filePath">文件路径</param>
/// <returns>写入成功，则返回非零值。如果函数失败或者只是刷新最近访问的缓冲区版本，返回值为零</returns>
[DllImport("kernel32")]
private static extern bool WritePrivateProfileString(string section, string key, string val, string filePath);
/// <summary>
/// 读配置文件
/// </summary>
/// <param name="section">节（当值为NULL时，读取全部节）</param>
/// <param name="key">键（当值为NULL时，读取全部键）</param>
/// <param name="defaultVal">默认值（键不存在时，返回该值。当值为NULL时，则往缓冲区中写入空字符串""，避免该值为""）</param>
/// <param name="returnVal">缓冲区，它接收检索到的字符串的指针</param>
/// <param name="size">缓冲区的大小</param>
/// <param name="filePath">文件的路径</param>
/// <returns>复制到缓冲区，不包括终止空字符的字符数</returns>
[DllImport("kernel32")]
private static extern int GetPrivateProfileString(string section, string key, string defaultVal, StringBuilder returnVal, int size, string filePath);
#endregion
#region 成员变量
private string fileName; //INI文件名
#endregion
#region 属性
/// <summary>
/// INI文件名
/// </summary>
public string FileName
{
set
{
fileName = string.IsNullOrEmpty(value) ? "my.ini" : value;
// 判断文件是否存在
FileInfo fileInfo = new FileInfo(fileName);
if ((!fileInfo.Exists))
{
//文件不存在，建立文件
StreamWriter sw = new StreamWriter(fileName, false, Encoding.Default);
try
{
sw.Close();
}
catch (Exception)
{
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;
}
}
#endregion
#region 构造函数
private RWIniFile()
{
fileName = string.Empty;
}
#endregion
#region 限制只能有一个对象
private static readonly RWIniFile instance = new RWIniFile();//菜单操作对象
public static RWIniFile Instance
{
get
{
return instance;
}
}
#endregion
#region 写字符串
/// <summary>
/// 写写字符串 www.jb200.com
/// </summary>
/// <param name="section">节</param>
/// <param name="key">键</param>
/// <param name="value">值</param>
public void WriteString(string section, string key, string value)
{
try
{
WritePrivateProfileString(section, key, value, fileName);
}
catch (Exception)
{
throw (new Exception("写入Ini文件出错"));
}
}
#endregion
#region 读字符串
/// <summary>
/// 读字符串（最大可以读500个字符）
/// </summary>
/// <param name="section">节</param>
/// <param name="key">键</param>
/// <param name="defaultVal">值</param>
/// <returns>返回指定节指定键的值</returns>
public string ReadString(string section, string key, string defaultVal)
{
StringBuilder temp = new StringBuilder(500);
try
{
GetPrivateProfileString(section, key, defaultVal, temp, 500, fileName);
}
catch (Exception)
{
throw (new Exception("读取Ini文件出错"));
}
return temp.ToString();
}
#endregion
#region 读整数
/// <summary>
/// 读整数
/// </summary>
/// <param name="section">节</param>
/// <param name="key">键</param>
/// <param name="defaultVal">默认值</param>
/// <returns>返回指定节指定键的值</returns>
public int ReadInteger(string section, string key, int defaultVal)
{
string result = ReadString(section, key, Convert.ToString(defaultVal));
try
{
return Convert.ToInt32(result);
}
catch (Exception)
{
throw (new Exception("该键的值不是整数！"));
}
}
#endregion
#region 写整数
/// <summary>
/// 写整数
/// </summary>
/// <param name="section">节</param>
/// <param name="key">键</param>
/// <param name="value">值</param>
public void WriteInteger(string section, string key, int value)
{
WriteString(section, key, value.ToString());
}
#endregion
#region 读布尔
/// <summary>
/// 读布尔
/// </summary>
/// <param name="section">节</param>
/// <param name="key">键</param>
/// <param name="defaultVal">默认值</param>
/// <returns></returns>
public bool ReadBool(string section, string key, bool defaultVal)
{
string result = ReadString(section, key, Convert.ToString(defaultVal));
try
{
return Convert.ToBoolean(result);
}
catch (Exception)
{
throw (new Exception("该键的值不是布尔值!"));
}
}
#endregion
#region 写Bool
/// <summary>
/// 写Bool
/// </summary>
/// <param name="section"></param>
/// <param name="key"></param>
/// <param name="value"></param>
public void WriteBool(string section, string key, bool value)
{
WriteString(section, key, Convert.ToString(value));
}
#endregion
#region 删除节
/// <summary>
/// 删除节
/// </summary>k
/// <param name="section">节</param>
public void DeleteSection(string section)
{
try
{
WritePrivateProfileString(section, null, null, fileName);
}
catch (Exception)
{
throw (new Exception("无法清除Ini文件中的节"));
}
}
#endregion
#region 删除节下的键
/// <summary>
/// 删除节下的键
/// </summary>
/// <param name="section">节</param>
/// <param name="key">键</param>
public void DeleteKey(string section, string key)
{
WritePrivateProfileString(section, key, null, fileName);
}
#endregion
#region 更新缓冲区
/// <summary>
/// 更新缓冲区(1、对于Win9X，需要实现UpdateFile方法将缓冲中的数据写入文件
//2、在Win NT, 2000和XP上，都是直接写文件，没有缓冲，无须实现UpdateFile3、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);
}
#endregion
#region 析构函数
/// <summary>
/// 更新缓冲区
/// </summary>
~RWIniFile()
{
UpdateFile();
}
#endregion
}
}