C#调用win32 API读写INI文件

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using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Runtime.InteropServices;namespace INI{    class ClassINI:IDisposable     {        [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 ref Val, int size, string filePath);        private bool bDisposed = false;        private string _FilePath = string.Empty;        public string FilePath        {            get            {                if (_FilePath == null)                    return string.Empty;                else                    return _FilePath;            }            set            {                if (_FilePath != value)                    _FilePath = value;            }        }        ///<summary>        ///構造函數        ///</summary>        ///<param name="path">檔案路徑</param>        public ClassINI(string path)        {            _FilePath = path;        }        ///<summary>        ///析構函數        ///</summary>        ~ClassINI()        {            Dispose(false);        }        ///<summary>        ///釋放資源(程序設計師呼叫)        ///</summary>        public void Dispose()        {            Dispose(true);            GC.SuppressFinalize(this);    //要求系統不要呼叫指定物件的完成項        }        ///<summary>        ///釋放資源(給系統呼叫的)        ///</summary>        protected virtual void Dispose(bool isDisposing)        {            if (bDisposed)            {                return;            }            if (isDisposing)            {            }            bDisposed = true;        }        ///<summary>        ///設定KeyValue值        ///</summary>        ///<param name="IN_Section">Section</param>        ///<param name="IN_Key">Key</param>        ///<param name="IN_Value">Value</param>        public void setKeyValue(string IN_Section,string IN_Key,string IN_Value)        {            WritePrivateProfileString(IN_Section, IN_Key, IN_Value, this._FilePath);        }        ///<summary>        ///取得Key相對的Value值        ///</summary>        ///<param name="IN_Section">Section</param>        ///<param name="IN_Key">Key</param>        public string getKeyValue(string IN_Section, string IN_Key)        {            StringBuilder temp = new StringBuilder(255);            int i = GetPrivateProfileString(IN_Section, IN_Key, "", temp, 255, this._FilePath);            return temp.ToString();        }        ///<summary>        ///取得key相對的value值,若無,則使用預設值(DefaulValue)        ///</summary>        ///<param name="Section">Section</param>        ///<param name="Key">Key</param>        ///<param name="DefaultValue">DefaultValue</param>        public string getKeyValue(string Section, string Key, string DefaultValue)        {            StringBuilder sbResult = null;            try            {                sbResult = new StringBuilder(255);                GetPrivateProfileString(Section, Key, "", sbResult, 255, this._FilePath);                return (sbResult.Length > 0) ? sbResult.ToString() : DefaultValue;            }            catch            {                return string.Empty;            }        }    }}
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