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提供常用的CRC-16 (Modbus) 和CRC-CCITT (XModem) 例子等多种CRC校验方法，亲测好用
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Management;namespace CRCApp
{
class Program
{
static void Main(string[] args)
{
//DriveInfo[] allDrives = DriveInfo.GetDrives();//检索计算机上的所有逻辑驱动器的驱动器名称
//foreach (DriveInfo d in allDrives)//循环输出各分区的信息
//{
// Console.WriteLine("Drive {0}", d.Name);
// Console.WriteLine(" File type: {0}", d.DriveType);//驱动器类型
// if (d.IsReady == true)
// {
// Console.WriteLine(" Volume label: {0}", d.VolumeLabel);//分区的卷标
// Console.WriteLine(" File system: {0}", d.DriveFormat);//分区的文件系统类型
// Console.WriteLine(
// " Available space to current user:{0, 15} bytes",
// d.AvailableFreeSpace);//指示驱动器上的可用空闲空间量。
// Console.WriteLine(
// " Total available space: {0, 15} bytes",
// d.TotalFreeSpace);//获取驱动器上的可用空闲空间总量
// Console.WriteLine(
// " Total size of drive: {0, 15} bytes ",
// d.TotalSize);//获取驱动器上存储空间的总大小
// }
//}
//Console.ReadLine();
Console.WriteLine("CRC校验算法集锦----LC编辑");
Console.WriteLine("--------------------------------");
Console.WriteLine("请输入CRC校验字符：");
string atcmd = Console.ReadLine();
while (atcmd != "exit")
{
Console.WriteLine();
string[] strs = atcmd.Split(' ');
byte[] data = new byte[strs.Length];
for (int i = 0; i < strs.Length; i )
{
int a = Convert.ToInt32(strs[i], 16);
data[i] = Convert.ToByte(a);
}
CRC8 crc8 = new CRC8();
crc8.Crc(data);
long cr8 = crc8.Value;
byte[] c8 = BitConverter.GetBytes(cr8);
Console.WriteLine("CRC8的校验为：" c8[1].ToString("X") "-" c8[0].ToString("X"));
CRC16 crc16 = new CRC16();
crc16.Crc(data);
long cr16 = crc16.Value;
byte[] c16 = BitConverter.GetBytes(cr16);
Console.WriteLine("CRC16的校验为：" c16[1].ToString("X") "-" c16[0].ToString("X"));
CRC32 crc32 = new CRC32();
crc32.Crc(data);
long cr32 = crc32.Value;
byte[] c32 = BitConverter.GetBytes(cr32);
Console.WriteLine("CRC32的校验为：" c32[3].ToString("X") "-" c32[2].ToString("X") "-" c32[1].ToString("X") "-" c32[0].ToString("X"));
Int16 ci16 = Crc16(data, data.Length);
byte[] ci = BitConverter.GetBytes(ci16);
Console.WriteLine("CRC16的奇偶校验为：" ci[1].ToString("X") "-" ci[0].ToString("X"));
Console.WriteLine();
ushort cRC_Result = CRCVerifyLHY.GetCRC(data, 0x1021);
byte[] crc_R = BitConverter.GetBytes(cRC_Result);
Console.WriteLine("CRC16-CCITT的简记式(0x1021)校验为：" crc_R[1].ToString("X") "-" crc_R[0].ToString("X"));
int crc_Result = CRCVerifyLHY.GetKey(data);
byte[] cr = BitConverter.GetBytes(crc_Result);
Console.WriteLine("CRC16-CCITT的多项式(X16 X12 X5 1)校验为：" cr[1].ToString("X") "-" cr[0].ToString("X"));
Console.WriteLine();
byte[] cc = System.Text.Encoding.Unicode.GetBytes(atcmd);
ushort crc16_1 = 0, crc16_2 = 0;
for (int i = 0; i < cc.Length; i )
{
crc16_1 = CRCTab.xcrc(crc16_1, cc[i]);
crc16_2 = CRCTab.xcrc2(crc16_2, cc[i]);
}
byte[] ct1 = BitConverter.GetBytes(crc16_1);
byte[] ct2 = BitConverter.GetBytes(crc16_2);
Console.WriteLine("CRCTab16位循环校验算法1：" ct1[1].ToString("X") "-" ct1[0].ToString("X"));
Console.WriteLine("CRCTab16位循环校验算法2：" ct2[1].ToString("X") "-" ct2[0].ToString("X"));
Console.WriteLine("================================");
Console.WriteLine();
Console.WriteLine();
Console.WriteLine("请输入CRC校验字符：");
atcmd = Console.ReadLine();
}
}
#region CRC高低位校验
/// <summary>
/// CRC高位校验码checkCRCHigh
/// </summary>
static byte[] ArrayCRCHigh =
{
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40
};
/// <summary>
/// CRC低位校验码checkCRCLow
/// </summary>
static byte[] checkCRCLow =
{
0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06,
0x07, 0xC7, 0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD,
0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09,
0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A,
0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC, 0x14, 0xD4,
0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3,
0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3,
0xF2, 0x32, 0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4,
0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A,
0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29,
0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF, 0x2D, 0xED,
0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26,
0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60,
0x61, 0xA1, 0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67,
0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F,
0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68,
0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA, 0xBE, 0x7E,
0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5,
0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71,
0x70, 0xB0, 0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92,
0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C,
0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B,
0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89, 0x4B, 0x8B,
0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C,
0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42,
0x43, 0x83, 0x41, 0x81, 0x80, 0x40
};
#endregion
/// <summary>
/// CRC校验
/// </summary>
/// <param name="data">校验的字节数组</param>
/// <param name="length">校验的数组长度</param>
/// <returns>该字节数组的奇偶校验字节</returns>
public static Int16 Crc16(byte[] data, int arrayLength)
{
byte CRCHigh = 0xFF;
byte CRCLow = 0xFF;
byte index;
int i = 0;
while (arrayLength-- > 0)
{
index = (System.Byte)(CRCHigh ^ data[i ]);
CRCHigh = (System.Byte)(CRCLow ^ ArrayCRCHigh[index]);
CRCLow = checkCRCLow[index];
}
return (Int16)(CRCHigh << 8 | CRCLow);
}
}
}