在最近的项目中有用到PLC与上位机通信的指令转换,用了各种方法,很是头疼,在网上搜集了和自己试着写了一下转换函数,分享给有需要的朋友。
1 /// <summary> Convert a string of hex digits (ex: E4 CA B2) to a byte array. </summary> 2 /// <param name="s"> The string containing the hex digits (with or without spaces). </param> 3 /// <returns> Returns an array of bytes. </returns> 4 public byte[] HexStringToByteArray(string s) 5 { 6 s = s.Replace(" ", ""); 7 byte[] buffer = new byte[s.Length / 2]; 8 for (int i = 0; i < s.Length; i += 2) 9 { 10 buffer[i / 2] = (byte)Convert.ToByte(s.Substring(i, 2), 16); 11 } 12 13 return buffer; 14 } 15 16 /// <summary> Converts an array of bytes into a formatted string of hex digits (ex: E4 CA B2)</summary> 17 /// <param name="data"> The array of bytes to be translated into a string of hex digits. </param> 18 /// <returns> Returns a well formatted string of hex digits with spacing. </returns> 19 public string ByteArrayToHexString(byte[] data) 20 { 21 StringBuilder sb = new StringBuilder(data.Length * 3); 22 foreach (byte b in data) 23 { 24 sb.Append(Convert.ToString(b, 16).PadLeft(2, '0').PadRight(3, ' ')); 25 } 26 27 return sb.ToString().ToUpper(); 28 } 29 30 /// <summary> 31 /// 将一条十六进制字符串转换为ASCII 32 /// </summary> 33 /// <param name="hexstring">一条十六进制字符串</param> 34 /// <returns>返回一条ASCII码</returns> 35 public static string HexStringToASCII(string hexstring) 36 { 37 byte[] bt = HexStringToBinary(hexstring); 38 string lin = ""; 39 for (int i = 0; i < bt.Length; i++) 40 { 41 lin = lin + bt[i] + " "; 42 } 43 44 45 string[] ss = lin.Trim().Split(new char[] { ' ' }); 46 char[] c = new char[ss.Length]; 47 int a; 48 for (int i = 0; i < c.Length; i++) 49 { 50 a = Convert.ToInt32(ss[i]); 51 c[i] = Convert.ToChar(a); 52 } 53 54 string b = new string(c); 55 return b; 56 } 57 58 59 /**/ 60 /// <summary> 61 /// 16进制字符串转换为二进制数组 62 /// </summary> 63 /// <param name="hexstring">用空格切割字符串</param> 64 /// <returns>返回一个二进制字符串</returns> 65 public static byte[] HexStringToBinary(string hexstring) 66 { 67 68 string[] tmpary = hexstring.Trim().Split(' '); 69 byte[] buff = new byte[tmpary.Length]; 70 for (int i = 0; i < buff.Length; i++) 71 { 72 buff[i] = Convert.ToByte(tmpary[i], 16); 73 } 74 return buff; 75 } 76 77 78 /// <summary> 79 /// 将byte型转换为字符串 80 /// </summary> 81 /// <param name="arrInput">byte型数组</param> 82 /// <returns>目标字符串</returns> 83 private string ByteArrayToString(byte[] arrInput) 84 { 85 int i; 86 StringBuilder sOutput = new StringBuilder(arrInput.Length); 87 for (i = 0; i < arrInput.Length; i++) 88 { 89 sOutput.Append(arrInput[i].ToString("X2")); 90 } 91 //将此实例的值转换为System.String 92 return sOutput.ToString(); 93 } 94 95 96 97 /// <summary> 98 /// 对接收到的数据进行解包(将接收到的byte型数组解包为Unicode字符串) 99 /// </summary> 100 /// <param name="recbytes">byte型数组</param> 101 /// <returns>Unicode编码的字符串</returns> 102 public string disPackage(byte[] recbytes) 103 { 104 string temp = ""; 105 foreach (byte b in recbytes) 106 temp += b.ToString("X2") + " ";//ToString("X2") 为C#中的字符串格式控制符 107 return temp; 108 } 109 110 /** 111 * int转byte[] 112 * 该方法将一个int类型的数据转换为byte[]形式,因为int为32bit,而byte为8bit所以在进行类型转换时,知会获取低8位, 113 * 丢弃高24位。通过位移的方式,将32bit的数据转换成4个8bit的数据。注意 &0xff,在这当中,&0xff简单理解为一把剪刀, 114 * 将想要获取的8位数据截取出来。 115 * @param i 一个int数字 116 * @return byte[] 117 */ 118 public static byte[] int2ByteArray(int i) 119 { 120 byte[] result = new byte[4]; 121 result[0] = (byte)((i >> 24) & 0xFF); 122 result[1] = (byte)((i >> 16) & 0xFF); 123 result[2] = (byte)((i >> 8) & 0xFF); 124 result[3] = (byte)(i & 0xFF); 125 return result; 126 } 127 /** 128 * byte[]转int 129 * 利用int2ByteArray方法,将一个int转为byte[],但在解析时,需要将数据还原。同样使用移位的方式,将适当的位数进行还原, 130 * 0xFF为16进制的数据,所以在其后每加上一位,就相当于二进制加上4位。同时,使用|=号拼接数据,将其还原成最终的int数据 131 * @param bytes byte类型数组 132 * @return int数字 133 */ 134 public static int bytes2Int(byte[] bytes) 135 { 136 int num = bytes[3] & 0xFF; 137 num |= ((bytes[2] << 8) & 0xFF00); 138 num |= ((bytes[1] << 16) & 0xFF0000); 139 num |= ((bytes[0] << 24) & 0xFF0000); 140 return num; 141 } 142 143 public static string Int2String(int str) 144 { 145 string S = Convert.ToString(str); 146 return S; 147 } 148 149 public static int String2Int(string str) 150 { 151 int a; 152 int.TryParse(str, out a); 153 int a1 = Convert.ToInt32(str); 154 return a1; 155 } 156 157 158 /*将int转为低字节在后,高字节在前的byte数组 159 b[0] = 11111111(0xff) & 01100001 160 b[1] = 11111111(0xff) & 00000000 161 b[2] = 11111111(0xff) & 00000000 162 b[3] = 11111111(0xff) & 00000000 163 */ 164 public byte[] IntToByteArray2(int value) 165 { 166 byte[] src = new byte[4]; 167 src[0] = (byte)((value >> 24) & 0xFF); 168 src[1] = (byte)((value >> 16) & 0xFF); 169 src[2] = (byte)((value >> 8) & 0xFF); 170 src[3] = (byte)(value & 0xFF); 171 return src; 172 } 173 //将高字节在前转为int,低字节在后的byte数组(与IntToByteArray2想对应) 174 public int ByteArrayToInt2(byte[] bArr) 175 { 176 if (bArr.Length != 4) 177 { 178 return -1; 179 } 180 return (int)((((bArr[0] & 0xff) << 24) 181 | ((bArr[1] & 0xff) << 16) 182 | ((bArr[2] & 0xff) << 8) 183 | ((bArr[3] & 0xff) << 0))); 184 } 185 186 public static string StringToHexArray(string input) 187 { 188 char[] values = input.ToCharArray(); 189 StringBuilder sb = new StringBuilder(input.Length * 3); 190 foreach (char letter in values) 191 { 192 // Get the integral value of the character. 193 int value = Convert.ToInt32(letter); 194 // Convert the decimal value to a hexadecimal value in string form. 195 string hexOutput = String.Format("{0:X}", value); 196 sb.Append(Convert.ToString(value, 16).PadLeft(2, '0').PadRight(3, ' ')); 197 } 198 199 return sb.ToString().ToUpper(); 200 201 #endregion 202 203 }
在这个过程中有参考网上大神的代码:
和谐:https://www.cnblogs.com/wxbug/p/6991445.html
王思明:https://www.cnblogs.com/maanshancss/p/4074524.html