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返回5，则检查IniPath是否添加了文件名称.ini

c#代码

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";              }          }        }  }