添加CRC16校验

UserClass/CRCcheck16.cs

@@ -0,0 +1,193 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace formula_manage.UserClass
+{
+    /// <summary>
+    /// CRC校验
+    /// </summary>
+    public class CRCcheck16
+    {
+
+        #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
+
+    }
+}