/// <summary>
 /// 编码二进制数据为字符串
 /// </summary>
 /// <param name="filePath">数据文件</param>
 /// <returns>编码后的字符串</returns>
 public static string EncodingFile(string filePath)
 {
     //(A ~ Z),算法:sourceByte => firstByte = (byte 右移 4) + 65 和 lastByte = (byte&(byte)15) + 65
     using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
     {
         byte[] buffer = new byte[fs.Length];
         fs.Read(buffer, 0, buffer.Length);
         return(FileStringCodingEx.EncodingBytes(buffer));
     }
 }