C# ASIIC解析 16 进制转换

 public class ToolClass
    {
        public static ushort CRC_GetModbus16(byte[] pData, int nLength)
        {
            ushort cRc_16 = 0xFFFF;
            byte temp;

            for (int i = 0; i < nLength; ++i)
            {
                temp = (byte)(cRc_16 & 0xFF);
                cRc_16 = (ushort)((cRc_16 >> 8) ^ g_McRctable_16[(temp ^ pData[i]) & 0xFF]);
            }
            return cRc_16;
        }

        //MODBUS CRC-16表 8005 逆序
        private static ushort[] g_McRctable_16 ={
    0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241,
    0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440,
    0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40,
    0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841,
    0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40,
    0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41,
    0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641,
    0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040,
    0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240,
    0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441,
    0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41,
    0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840,
    0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41,
    0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40,
    0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640,
    0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041,
    0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240,
    0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480, 0xA441,
    0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41,
    0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840,
    0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41,
    0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40,
    0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640,
    0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041,
    0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280, 0x9241,
    0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440,
    0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40,
    0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841,
    0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40,
    0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41,
    0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641,
    0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040
    };
        /// 

        /// 转换ASCII
        /// 
        /// 
        public static string GetASCII(string ascii)
        {
            //string str = "41 6C 66 61 2D 42 31 20 32 30 31 39 31 31 31 30 00 00 00 00";
            // str = str.Replace( " ","");
            ascii = ascii.Replace(" ", "");
            byte[] bufData = Str_change_byte(ascii);
            //byte[] bufData1 = new byte[] { 0x41, 0x6C, 0x66, 0x61 , 0x2D, 0x42 , 0x31, 0x20, 0x32, 0x30, 0x31,0x39 ,0x31, 0x31,0x31 ,0x30 ,0x00, 0x00, 0x00 ,0x00 };
            //Convert.ToString(System.Text.Encoding.ASCII.GetString(bufData1));
            return System.Text.Encoding.ASCII.GetString(bufData);
        }

        /// 

        /// string 转 byte
        /// 
        /// 
        /// 
        public static   byte[] Str_change_byte(string str)
        {
            byte[] Data = new byte[str.Length];
            int count = 0;
            string strSource = str.Replace("\n", "").Replace(" ", "").Replace("\t", "").Replace("\r", "");

            try
            {
                for (int i = 0; i < (strSource.Length - strSource.Length % 2) / 2; i++)//取余3运算作用是防止用户输入的字符为奇数个
                {
                    Data[count] = Convert.ToByte(strSource.Substring(i * 2, 2), 16);
                    count++;
                }
                if (strSource.Length % 2 != 0)//剩下一位单独处理
                {
                    Data[count] = Convert.ToByte(strSource.Substring(strSource.Length - 1, 1), 16);//单独处理B（0B）
                    count++;
                }
            }
            catch (Exception)
            {
                MessageBox.Show("Error：数据包含非法字符\n", "错误:", MessageBoxButtons.OK, MessageBoxIcon.Error);//出错提示
                return null;
            }
            byte[] buf = new byte[count];
            Array.Copy(Data, 0, buf, 0, count); //复制原始数据    
            return buf;
        }
        // 1、数字和字节之间互转
        //int num = 12345;
        // byte[] bytes = BitConverter.GetBytes(num);//将int32转换为字节数组
        // num=BitConverter.ToInt32(bytes,0);//将字节数组内容再转成int32类型
        //2、将字符串转为16进制字符，允许中文

        public  static string StringToHexString(string s, Encoding encode)
        {
            byte[] b = encode.GetBytes(s);//按照指定编码将string编程字节数组
            string result = string.Empty;
            for (int i = 0; i < b.Length; i++)//逐字节变为16进制字符
            {
                result += Convert.ToString(b[i], 16);
            }
            return result;
        }

        //如：
        ///注意，一个中文转为utf-8占三个字节，英文占一个字节
        //System.Console.WriteLine(StringToHexString("中华人民共和国",
        //System.Text.Encoding.UTF8));
        //或使用
        //BitConverter.ToString(Encoding.UTF8.GetBytes("中华人民共和国"))
        //返回结果为XX-XX-XX
        //然后再去掉"-"
        //
        //3、将16进制字符串转为字符串

        public  static string HexStringToString(string hs, Encoding encode)
        {
            string strTemp = "";
            byte[] b = new byte[hs.Length / 2];
            for (int i = 0; i < hs.Length / 2; i++)
            {
                strTemp = hs.Substring(i * 2, 2);
                b[i] = Convert.ToByte(strTemp, 16);
            }
            //按照指定编码将字节数组变为字符串
            return encode.GetString(b);
        }

        //如：
        //string hexstring = StringToHexString("中华人民共和国", System.Text.Encoding.UTF8);
        // string content = HexStringToString(hexstring, System.Text.Encoding.UTF8)
        //4、将byte[] 转为16进制字符串
        public static   string byteToHexStr(byte[] bytes)
        {
            string returnStr = "";
            if (bytes != null)
            {
                for (int i = 0; i < bytes.Length; i++)
                {
                    returnStr += bytes[i].ToString("X2");
                }
            }
            return returnStr;
        }

        //5、将16进制的字符串转为byte[]
        private static byte[] strToToHexByte(string hexString)
        {
            hexString = hexString.Replace(" ", "");
            if ((hexString.Length % 2) != 0)
                hexString += " ";
            byte[] returnBytes = new byte[hexString.Length / 2];
            for (int i = 0; i < returnBytes.Length; i++)
                returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16);
            return returnBytes;
        }

        /// 

        /// 转16进制10   textBox5.Text =                 T 
        ///oolClass.ConvertNumber(textBox6.Text.Trim().Replace(" ", ""), 16, 10);
        /// 
        /// 
        /// 
        public static string ConvertNumber(string input,int typeOInput ,int typeOfOutput)
        {
            int value = Convert.ToInt32(input,typeOInput);
            string res = Convert.ToString(value,typeOfOutput);
           // res= Convert.ToString(Convert.ToInt32(res) / 10000);
            return res;

        }
    }

使用

        /// 

        /// 循环冗余校验
        /// 
        /// 
        /// 
        private void button1_Click(object sender, EventArgs e)
        {
            string str = textBox1.Text.Trim();
            byte[] byteStr= ToolClass.Str_change_byte(str);
            ushort crc= ToolClass.CRC_GetModbus16(byteStr, byteStr.Length);
            textBox2.Text=str+Convert.ToString(crc, 16).ToUpper();
        }
        ///ASIIC
        private void button2_Click(object sender, EventArgs e)
        {
           this.textBox4.Text= ToolClass.GetASCII(textBox3.Text.Trim());
        }

        private void button3_Click(object sender, EventArgs e)
        {
            try
            {
                //textBox6.Text.Trim().Replace(" ","");
                textBox5.Text = ToolClass.ConvertNumber(textBox6.Text.Trim().Replace(" ", ""), 16, 10);
            }
            catch (Exception ex)
            {
                Console.WriteLine( ex.Message);
            }
           

        }