讀取TXT檔案的編碼

來源:互聯網
上載者:User
private Encoding GetFileEncoding(Stream s)
        {            
            Encoding encoding = Encoding.Default;
            try
            {
                /**//*
                 * ANSI:         無格式定義;
                 * Unicode:        前兩個位元組為FFFE/255,254;
                 * Unicode big endian:  前兩位元組為FEFF/254,255; 
                 * UTF-8:         前兩位元組為EFBB/239,187;
                */
                byte[] FirstByte = new byte[2];
                s.Read(FirstByte, 0, FirstByte.Length);
                if (FirstByte[0] == 239 && FirstByte[1] == 187)
                    return Encoding.UTF8;
                else if (FirstByte[0] == 255 && FirstByte[1] == 254)
                    return Encoding.Unicode;
                else if (FirstByte[0] == 254 && FirstByte[1] == 255)
                    return Encoding.BigEndianUnicode;
            }
            catch
            { }
            return encoding;
        }

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