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crc16 校验算法 C#

封装一个静态类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace TestApp
{
    public class CRC
    {

        #region  CRC16
        public static byte[] CRC16(byte[] data)
        {
            int len = data.Length;
            if (len > 0)
            {
                ushort crc = 0xFFFF;

                for (int i = 0; i < len; i++)
                {
                    crc = (ushort)(crc ^ (data[i]));
                    for (int j = 0; j < 8; j++)
                    {
                        crc = (crc & 1) != 0 ? (ushort)((crc >> 1) ^ 0xA001) : (ushort)(crc >> 1);
                    }
                }
                byte hi = (byte)((crc & 0xFF00) >> 8);  //高位置
                byte lo = (byte)(crc & 0x00FF);         //低位置

                return new byte[] { hi, lo };
            }
            return new byte[] { 0, 0 };
        }
        #endregion

        #region  ToCRC16
        public static string ToCRC16(string content)
        {
            return ToCRC16(content, Encoding.UTF8);
        }

        public static string ToCRC16(string content, bool isReverse)
        {
            return ToCRC16(content, Encoding.UTF8, isReverse);
        }

        public static string ToCRC16(string content, Encoding encoding)
        {
            return ByteToString(CRC16(encoding.GetBytes(content)), true);
        }

        public static string ToCRC16(string content, Encoding encoding, bool isReverse)
        {
            return ByteToString(CRC16(encoding.GetBytes(content)), isReverse);
        }

        public static string ToCRC16(byte[] data)
        {
            return ByteToString(CRC16(data), true);
        }

        public static string ToCRC16(byte[] data, bool isReverse)
        {
            return ByteToString(CRC16(data), isReverse);
        }
        #endregion

        #region  ToModbusCRC16
        public static string ToModbusCRC16(string s)
        {
            return ToModbusCRC16(s, true);
        }

        public static string ToModbusCRC16(string s, bool isReverse)
        {
            return ByteToString(CRC16(StringToHexByte(s)), isReverse);
        }

        public static string ToModbusCRC16(byte[] data)
        {
            return ToModbusCRC16(data, true);
        }

        public static string ToModbusCRC16(byte[] data, bool isReverse)
        {
            return ByteToString(CRC16(data), isReverse);
        }
        #endregion

        #region  ByteToString
        public static string ByteToString(byte[] arr, bool isReverse)
        {
            try
            {
                byte hi = arr[0], lo = arr[1];
                return Convert.ToString(isReverse ? hi + lo * 0x100 : hi * 0x100 + lo, 16).ToUpper().PadLeft(4, '0');
            }
            catch (Exception ex) { throw (ex); }
        }

        public static string ByteToString(byte[] arr)
        {
            try
            {
                return ByteToString(arr, true);
            }
            catch (Exception ex) { throw (ex); }
        }
        #endregion

        #region  StringToHexString
        public static string StringToHexString(string str)
        {
            StringBuilder s = new StringBuilder();
            foreach (short c in str.ToCharArray())
            {
                s.Append(c.ToString("X4"));
            }
            return s.ToString();
        }
        #endregion

        #region  StringToHexByte
        private static string ConvertChinese(string str)
        {
            StringBuilder s = new StringBuilder();
            foreach (short c in str.ToCharArray())
            {
                if (c <= 0 || c >= 127)
                {
                    s.Append(c.ToString("X4"));
                }
                else
                {
                    s.Append((char)c);
                }
            }
            return s.ToString();
        }

        private static string FilterChinese(string str)
        {
            StringBuilder s = new StringBuilder();
            foreach (short c in str.ToCharArray())
            {
                if (c > 0 && c < 127)
                {
                    s.Append((char)c);
                }
            }
            return s.ToString();
        }

        /// <summary>
        /// 字符串转16进制字符数组
        /// </summary>
        /// <param name="hex"></param>
        /// <returns></returns>
        public static byte[] StringToHexByte(string str)
        {
            return StringToHexByte(str, false);
        }

        /// <summary>
        /// 字符串转16进制字符数组
        /// </summary>
        /// <param name="str"></param>
        /// <param name="isFilterChinese">是否过滤掉中文字符</param>
        /// <returns></returns>
        public static byte[] StringToHexByte(string str, bool isFilterChinese)
        {
            string hex = isFilterChinese ? FilterChinese(str) : ConvertChinese(str);

            //清除所有空格
            hex = hex.Replace(" ", "");
            //若字符个数为奇数，补一个0
            hex += hex.Length % 2 != 0 ? "0" : "";

            byte[] result = new byte[hex.Length / 2];
            for (int i = 0, c = result.Length; i < c; i++)
            {
                result[i] = Convert.ToByte(hex.Substring(i * 2, 2), 16);
            }
            return result;
        }
        #endregion

    }
}

View Code

调用测试

  static void Main(string[] args)
        {
            string msg = "01 2C 00 00 00 00 00 00 0A 4F 4F 05 93 00 07 06 15 00 00 00 23 3D F5 7C 45 71 20 00 45 71 20 00 00 00 00 00 40 DF 70 E3 00 00 00 00 BF 8F D6 63 00 00 00 00 00 00 00 00 10 20 00 00 41 30 00 00 23 3D F9 00 45 71 20 00 45 71 20 00 00 00 00 00 00 00 00 00 00 00 00 00 BF 8E 47 99 00 00 00 00 00 00 00 00 10 20 00 00 41 30 00 00 23 3D FC 84 45 71 20 00 45 71 20 00 00 00 00 00 00 00 00 00 00 00 00 00 BF 8A FD 76 00 00 00 00 00 00 00 00 10 20 00 00 41 30 00 00 23 3E 00 08 45 71 20 00 45 71 20 00 00 00 00 00 00 00 00 00 00 00 00 00 BF 92 C7 B9 00 00 00 00 00 00 00 00 10 20 00 00 41 30 00 00 23 3E 03 8C 45 71 20 00 45 71 20 00 00 00 00 00 00 00 00 00 00 00 00 00 BF 8A A4 FD 00 00 00 00 00 00 00 00 10 20 00 00 41 30 00 00 23 3E 07 10 45 71 20 00 45 71 20 00 00 00 00 00 00 00 00 00 00 00 00 00 BF 8D EE CC 00 00 00 00 00 00 00 00 10 20 00 00 41 30 00 00 23 3E 0A 94 45 71 20 00 45 71 20 00 00 00 00 00 00 00 00 00 00 00 00 00 BF 88 38 B0 00 00 00 00 00 00 00 00 10 20 00 00 41 30 00 00 23 3E 0E 18 45 71 40 00 45 71 50 00 00 00 00 00 41 1F D4 4B 00 00 00 00 BF 7C 04 97 00 00 00 00 00 00 00 00 10 20 00 00 41 30 00 00 23 3E 11 9C 45 71 70 00 45 71 70 00 00 00 00 00 41 15 7B 74 00 00 00 00 BF 8E A0 12 00 00 00 00 00 00 00 00 10 20 00 00 41 30 00 00 23 3E 15 20 45 71 90 00 45 71 90 00 00 00 00 00 40 E1 D9 FE 00 00 00 00 BF 8C E5 0D 00 00 00 00 00 00 00 00 10 20 00 00 41 30 00 00";
            var a = CRC.ToCRC16(msg, true);          //结果为：
            var b = CRC.ToCRC16(msg, false);           //结果为：
            var c = CRC.ToModbusCRC16(msg, true);      //结果为：
            var e = CRC.ToModbusCRC16(msg, false);
            var d = CRC.ToCRC16("你好，我们测试一下CRC16算法", true);   //结果为：
        }

View Code

完成。

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原文地址：https://www.cnblogs.com/dearbeans/p/9716756.html