C# 异或校验算法

C# 的异或校验算法 直接上代码

   public partial class FormCRC : Form

    {

        public FormCRC()

        {

            InitializeComponent();

        }

        private void FormCRC_Load(object sender, EventArgs e)

        {

        }

        /// <summary>

        /// CRC异或校验

        /// </summary>

        /// <param name="cmdString">命令字符串</param>

        /// <returns></returns>

        private static string CRC(string cmdString)

        {

            try

            {

                //CRC寄存器

                int CRCCode = 0;

                //将字符串拆分成为16进制字节数据然后两位两位进行异或校验

                for (int i = 1; i < cmdString.Length / 2; i++)

                {

                    string cmdHex = cmdString.Substring(i * 2, 2);

                    if (i == 1)

                    {

                        string cmdPrvHex = cmdString.Substring((i - 1) * 2, 2);

                        CRCCode = (byte)Convert.ToInt32(cmdPrvHex, 16) ^ (byte)Convert.ToInt32(cmdHex, 16);

                    }

                    else

                    {

                        CRCCode = (byte)CRCCode ^ (byte)Convert.ToInt32(cmdHex, 16);

                    }

                }

                return Convert.ToString(CRCCode, 16).ToUpper();//返回16进制校验码

            }

            catch

            {

                throw;

            }

        }

        private void btnConvert_Click(object sender, EventArgs e)

        {

            try

            {

                txtCRCCode.Text = CRC(txtCMDString.Text.Replace(" ", ""));

            }

            catch

            {

                MessageBox.Show("校验失败,请检查字符串是否包含特殊字符");

            }

        }

    }

　　执行结果：