C#实现利用Windows API读写INI文件的方法

本文实例讲述了c#实现利用windows api读写ini文件的方法。分享给大家供大家参考。具体如下：

写入时，如果没有ini文件，自动创建ini
如果在创建时，getlasterror:5 检查inipath是否添加了文件名称.ini

using system;
using system.collections.generic;
using system.text;
using system.io;
using system.runtime.interopservices;
namespace namespace
{
 /// <summary>
 /// 利用windows api读写ini文件
 /// 写入时，如果没有ini文件，自动创建ini
 /// 如果在创建时，getlasterror:5 检查inipath是否添加了文件名称.ini
 /// </summary>
 public class ini
 {
  //声明kernel32.dll函数
  [dllimport("kernel32")]
  private static extern long writeprivateprofilestring(string section, string key, string val, string filepath);
  [dllimport("kernel32")]
  private static extern int getprivateprofilestring(string section, string key, string def, stringbuilder retval, int size, string filepath);
  //
  [dllimport("kernel32")]
  public static extern uint getlasterror();
  string inipath = null;
  /// <summary>
  /// 构造方法
  /// </summary>
  /// <param name="inipath">ini文件的绝对路径，后面不需要斜杠</param>
  /// <param name="inifilename">ini文件名称使用时不需要斜杠，需要.ini</param>
  public ini(string inipath,string inifilename)
  {
   console.writeline("ini object building");
   inipath = inipath + "\\" + inifilename;
   console.writeline("inifilepath :" + inipath);
  }
  /// <summary>
  /// 写入ini文件
  /// </summary>
  /// <param name="section">section</param>
  /// <param name="key">key</param>
  /// <param name="value">value</param>
  public void iniwritevalue(string section, string key, string value)
  {
   console.writeline("---iniwritevalue---");
   console.writeline("section :" + section);
   console.writeline("key :" + key);
   console.writeline("value :" + value);
   console.writeline("inipath :" + inipath);
   uint32 snapshot = getlasterror();
   //
   writeprivateprofilestring(section, key, value, inipath);
   if (snapshot != getlasterror())
   {
    console.writeline("getlasterror :" + getlasterror());
   }
  }
  /// <summary>
  /// 读出ini文件
  /// </summary>
  /// <param name="section">section</param>
  /// <param name="key">key</param>
  public string inireadvalue(string section, string key)
  {
   stringbuilder result = new stringbuilder(256);
   getprivateprofilestring(section, key, null, result, 256, inipath);
   return result.tostring();
  }
  public bool existinifile()
  {
   return file.exists(inipath);
  }
  /// <summary>
  /// creat config file to application ini
  /// </summary>
  /// <param name="dnf_path"></param>
  public void createconfig(string ip)
  {
   console.writeline("createconfig");
   console.writeline("ip:" + ip);
   try
   {
    writeconfigip(ip);
    if (existinifile())
    {
     console.writeline("配置文件创建成功");
    }
    else
    {
     console.writeline("配置文件创建不成功");
    }
   }
   catch (exception err)
   {
    console.writeline("出错信息:" + err.tostring());
   }
  }
  /// <summary>
  /// write config for ip information
  /// </summary>
  /// <param name="ip"></param>
  public void writeconfigip(string ip)
  {
   string section = "config";
   string key = "ip";
   string value = ip;
   try
   {
    iniwritevalue(section, key, value);
   }
   catch (exception err)
   {
    console.writeline("出错信息:" + err.tostring());
   }
  }
  public string readconfigip()
  {
   try
   {
    string section = "config";
    string result = inireadvalue(section, "ip");
    console.writeline("readconfigip result :" + result);
    return result;
   }
   catch (exception err)
   {
    console.writeline("出错信息:" + err.tostring());
    return "read error";
   }
  }
 }
}

希望本文所述对大家的c#程序设计有所帮助。