winform读写ini配置文件

        public static string readfile()
        {
            string iniserver;
            string inidatabase;
            string iniuid;
            string inipsw;
            ReadIniFile file = new ReadIniFile(@"D:test.INI");
            string inifilename = file.FileName();
            bool isexist = file.ExistINIFile();
            string strConn = "";
            if (file.ExistINIFile())
            {
                iniserver = file.GetString("sql", "server");
                inidatabase = file.GetString("sql", "database");
                iniuid = file.GetString("sql", "uid");
                inipsw = file.GetString("sql", "psw");
                strConn = "server=" + iniserver + ";uid=" + iniuid + ";pwd=" + inipsw + ";database=" + inidatabase + ";";

            }
            else
            {
                MessageBox.Show("配置文件不存在！");
            }
            return strConn;
        }

        public static void writefile(string test)
        {
            ReadIniFile file = new ReadIniFile(@"D:test.INI");
            string inifilename = file.FileName();
            bool isexist = file.ExistINIFile();
            string yyy = test;
            if (file.ExistINIFile())
            {
                file.WriteInt("kkkk", "age", 12);
                file.WriteInt("kkkk", "page", 37);
                file.WriteString("ffff", "mayname", yyy);

            }
            else
            {
                MessageBox.Show("配置文件不存在！");
            }
        }
       

    }

    class ReadIniFile
    {
        public string fileName;
        [DllImport("kernel32")]
        private static extern int GetPrivateProfileString(
           string lpAppName,// 指向包含 Section 名称的字符串地址
           string lpKeyName,// 指向包含 Key 名称的字符串地址
           string lpDefault,// 如果 Key 值没有找到，则返回缺省的字符串的地址
           StringBuilder lpReturnedString,// 返回字符串的缓冲区地址
           int nSize,// 缓冲区的长度
           string lpFileName
           );
       
        [DllImport("kernel32")]
        private static extern bool WritePrivateProfileString(
        string lpAppName,
        string lpKeyName,
        string lpString,
        string lpFileName
        );

        public ReadIniFile(string filename)
        {
            this.fileName = filename;

        }
        public string GetString(string section, string key)
        {
            StringBuilder temp = new StringBuilder(1024);
            GetPrivateProfileString(section, key, "", temp, 1024, this.fileName);
            return temp.ToString();

        }

        public bool ExistINIFile()
        {
            return File.Exists(this.fileName);
        }
        public string FileName()
        {
            return this.fileName;
        }
        public void WriteInt(string section, string key, int iVal)
        {
            WritePrivateProfileString(section, key, iVal.ToString(), fileName);
        }
        public void WriteString(string section, string key, string strVal)
        {
            WritePrivateProfileString(section, key, strVal, fileName);
        }

        public void DelKey(string section, string key)
        {
            WritePrivateProfileString(section, key, null, fileName);
        }
        public void DelSection(string section)
        {
            WritePrivateProfileString(section, null, null, fileName);
        }

 

    }
}