ini文件主要用于保存配置。之前一直以为是当作普通文本进行操作，读取里面的内容，再自己解析读取的文本。后来发现已经有写好的api函数：WritePrivateProfileString()和GetPrivateProfileString()。
然后查看怎么使用，直到看到有人已经封装成了类，直接使用即可。代码源自一下链接，稍微做了下笔记，记录于此。
参考链接：
http://blog.csdn.net/geekwangminli/article/details/7851673
http://www.cnblogs.com/zzyyll2/archive/2007/11/06/950584.html
IniFile.cs
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
namespace INIFILE
{
public abstract class CustomIniFile
{
public CustomIniFile(string AFileName)
{
FFileName = AFileName;
}
private string FFileName;
public string FileName
{
get { return FFileName; }
}
public virtual bool SectionExists(string Section)
{
List<string> vStrings = new List<string>();
ReadSections(vStrings);
return vStrings.Contains(Section);
}
public virtual bool ValueExists(string Section, string Ident)
{
List<string> vStrings = new List<string>();
ReadSection(Section, vStrings);
return vStrings.Contains(Ident);
}
public abstract string ReadString(string Section, string Ident, string Default);
public abstract bool WriteString(string Section, string Ident, string Value);
public abstract bool ReadSectionValues(string Section, List<string> Strings);
public abstract bool ReadSection(string Section, List<string> Strings);
public abstract bool ReadSections(List<string> Strings);
public abstract bool EraseSection(string Section);
public abstract bool DeleteKey(string Section, string Ident);
public abstract bool UpdateFile();
}
/// <summary>
/// 存储本地INI文件的类。
/// </summary>
public class IniFile : CustomIniFile
{
[DllImport("kernel32")]
private static extern uint GetPrivateProfileString(
string lpAppName, // points to section name
string lpKeyName, // points to key name
string lpDefault, // points to default string
byte[] lpReturnedString, // points to destination buffer
uint nSize, // size of destination buffer
string lpFileName // points to initialization filename
);
[DllImport("kernel32")]
private static extern bool WritePrivateProfileString(
string lpAppName, // pointer to section name
string lpKeyName, // pointer to key name
string lpString, // pointer to string to add
string lpFileName // pointer to initialization filename
);
/// <summary>
/// 构造IniFile实例。
/// <param name="AFileName">指定文件名</param>
/// </summary>
public IniFile(string AFileName)
: base(AFileName)
{
}
/// <summary>
/// 析够IniFile实例。
/// </summary>
~IniFile()
{
UpdateFile();
}
/// <summary>
/// 读取字符串值。
/// <param name="Ident">指定变量标识。</param>
/// <param name="Section">指定所在区域。</param>
/// <param name="Default">指定默认值。</param>
/// <returns>返回读取的字符串。如果读取失败则返回该值。</returns>
/// </summary>
/* 读取key对应的value的值，如果对应的key不存在或者存在，但没有等号，就是用默认值Default */
public override string ReadString(string Section, string Ident, string Default)
{
byte[] vBuffer = new byte[2048];
uint vCount = GetPrivateProfileString(Section,
Ident, Default, vBuffer, (uint)vBuffer.Length, FileName);
return Encoding.Default.GetString(vBuffer, 0, (int)vCount);
}
/// <summary>
/// 写入字符串值。
/// </summary>
/// <param name="Section">指定所在区域。</param>
/// <param name="Ident">指定变量标识。</param>
/// <param name="Value">所要写入的变量值。</param>
/// <returns>返回写入是否成功。</returns>
public override bool WriteString(string Section, string Ident, string Value)
{
return WritePrivateProfileString(Section, Ident, Value, FileName);
}
/// <summary>
/// 获得区域的完整文本。(变量名=值格式)。
/// </summary>
/// <param name="Section">指定区域标识。</param>
/// <param name="Strings">输出处理结果。</param>
/// <returns>返回读取是否成功。</returns>
public override bool ReadSectionValues(string Section, List<string> Strings)
{
List<string> vIdentList = new List<string>();
// 先读取某个section中所有的key值
if (!ReadSection(Section, vIdentList)) return false;
// 根据key值获取value的值，并按照格式组成string
foreach (string vIdent in vIdentList)
Strings.Add(string.Format("{0}={1}", vIdent, ReadString(Section, vIdent, "")));
return true;
}
/// <summary>
/// 读取区域变量名列表。
/// </summary>
/// <param name="Section">指定区域名。</param>
/// <param name="Strings">指定输出列表。</param>
/// <returns>返回获取是否成功。</returns>
/* 读取某一个section中所有的key的值*/
public override bool ReadSection(string Section, List<string> Strings)
{
byte[] vBuffer = new byte[16384];
//读取整个section中的key值，存到vBuffer中
uint vLength = GetPrivateProfileString(Section, null, null, vBuffer,
(uint)vBuffer.Length, FileName);
int j = 0;
for (int i = 0; i < vLength; i++)
if (vBuffer[i] == 0)
{
//将byte类型转成string,并保存到动态数组中, 按照0分开
//byte内容如下，每个key通过00分隔
//4E-61-6D-65-00-42-61-75-64-52-61-74-65-00-44-61-74-61-42-69-74-73-00-53-74-6F-70-42-69-74-73-00-47-5F-50-41-52-49-54-59
//将一长串字符组成string,就是将2个00之间的byte内容组成string,并添加到动态数组中
Strings.Add(Encoding.Default.GetString(vBuffer, j, i - j));
j = i + 1;
}
return true;
}
/// <summary>
/// 读取区域名列表。
/// </summary>
/// <param name="Strings">指定输出列表。</param>
/// <returns></returns>
/* 读取的是中括号中的section名字 */
public override bool ReadSections(List<string> Strings)
{
byte[] vBuffer = new byte[16384];
uint vLength = GetPrivateProfileString(null, null, null, vBuffer,
(uint)vBuffer.Length, FileName);
int j = 0;
for (int i = 0; i < vLength; i++)
if (vBuffer[i] == 0)
{
// 将数组中第j~i个byte的内容转成string,添加到list中
Strings.Add(Encoding.Default.GetString(vBuffer, j, i - j));
j = i + 1;
}
return true;
}
/// <summary>
/// 删除指定区域。
/// </summary>
/// <param name="Section">指定区域名。</param>
/// <returns>返回删除是否成功。</returns>
/* 删除整个section的内容 */
public override bool EraseSection(string Section)
{
return WritePrivateProfileString(Section, null, null, FileName);
}
/// <summary>
/// 删除指定变量。
/// </summary>
/// <param name="Section">变量所在区域。</param>
/// <param name="Ident">变量标识。</param>
/// <returns>返回删除是否成功。</returns>
/* 删除之后，key和value的值都不存在 */
public override bool DeleteKey(string Section, string Ident)
{
return WritePrivateProfileString(Section, Ident, null, FileName);
}
/// <summary>
/// 更新文件。
/// </summary>
/// <returns>返回更新是否成功。</returns>
public override bool UpdateFile()
{
return WritePrivateProfileString(null, null, null, FileName);
}
}
}
Profile.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace INIFILE
{
class Profile
{
public static void LoadProfile()
{
//获取生成的可执行文件的目录
string strPath = AppDomain.CurrentDomain.BaseDirectory;
_file = new IniFile(strPath + "Cfg.ini");
G_BAUDRATE = _file.ReadString("CONFIG", "BaudRate", "4800"); //读数据，下同
G_DATABITS = _file.ReadString("CONFIG", "DataBits", "8");
G_STOP = _file.ReadString("CONFIG", "StopBits", "1");
G_PARITY = _file.ReadString("CONFIG", "Parity", "NONE");
}
public static void SaveProfile()
{
string strPath = AppDomain.CurrentDomain.BaseDirectory;
_file = new IniFile(strPath + "Cfg.ini");
_file.WriteString("CONFIG", "BaudRate", G_BAUDRATE); //写数据，下同
_file.WriteString("CONFIG", "DataBits", G_DATABITS);
_file.WriteString("CONFIG", "StopBits", G_STOP);
_file.WriteString("CONFIG", "G_PARITY", G_PARITY);
}
private static IniFile _file;//内置了一个对象
public static string G_BAUDRATE = "1200";//给ini文件赋新值，并且影响界面下拉框的显示
public static string G_DATABITS = "8";
public static string G_STOP = "1";
public static string G_PARITY = "NONE";
}
}
Tony Liu
2016-9-26，Shenzhen