C# 进制之间的转换.docx

1、C# 进制之间的转换C# 进制之间的转换 1 / <summary> 2 / 十进制转换为二进制 3 / </summary> 4 / <param name=x></param> 5 / <returns></returns> 6 public static string DecToBin(string x) 7 8 string z = null; 9 int X = Convert.ToInt32(x); 10 int i = 0; 11 long a, b = 0; 12 while (X > 0) 13 1

2、4 a = X%2; 15 X = X/2; 16 b = b + a*Pow(10, i); 17 i+; 18 19 z = Convert.ToString(b); 20 return z; 21 22 23 / <summary> 24 / 16进制转ASCII码 25 / </summary> 26 / <param name=hexString></param> 27 / <returns></returns> 28 public static string HexToAscii(string hexStrin

3、g) 29 30 StringBuilder sb = new StringBuilder(); 31 for (int i = 0; i <= hexString.Length - 2; i += 2) 32 33 sb.Append( 34 Convert.ToString( 35 Convert.ToChar(Int32.Parse(hexString.Substring(i, 2), 36 System.Globalization.NumberStyles.HexNumber); 37 38 return sb.ToString(); 39 40 41 / <summary

4、> 42 / 十进制转换为八进制 43 / </summary> 44 / <param name=x></param> 45 / <returns></returns> 46 public static string DecToOtc(string x) 47 48 string z = null; 49 int X = Convert.ToInt32(x); 50 int i = 0; 51 long a, b = 0; 52 while (X > 0) 53 54 a = X%8; 55 X = X/8; 56 b

5、= b + a*Pow(10, i); 57 i+; 58 59 z = Convert.ToString(b); 60 return z; 61 62 63 / <summary> 64 / 十进制转换为十六进制 65 / </summary> 66 / <param name=x></param> 67 / <returns></returns> 68 public static string DecToHex(string x) 69 70 if (string.IsNullOrEmpty(x) 71 72 retu

6、rn 0; 73 74 string z = null; 75 int X = Convert.ToInt32(x); 76 Stack a = new Stack(); 77 int i = 0; 78 while (X > 0) 79 80 a.Push(Convert.ToString(X%16); 81 X = X/16; 82 i+; 83 84 while (a.Count != 0) 85 z += ToHex(Convert.ToString(a.Pop(); 86 if (string.IsNullOrEmpty(z) 87 88 z = 0; 89 90 return

7、 z; 91 92 93 / <summary> 94 / 二进制转换为十进制 95 / </summary> 96 / <param name=x></param> 97 / <returns></returns> 98 public static string BinToDec(string x) 99 100 string z = null;101 int X = Convert.ToInt32(x);102 int i = 0;103 long a, b = 0;104 while (X > 0)105 10

8、6 a = X%10;107 X = X/10;108 b = b + a*Pow(2, i);109 i+;110 111 z = Convert.ToString(b);112 return z;113 114 115 / <summary>116 / 二进制转换为十进制，定长转换117 / </summary>118 / <param name=x></param>119 / <param name=iLength></param>120 / <returns></returns>121 pu

9、blic static string BinToDec(string x, short iLength)122 123 StringBuilder sb = new StringBuilder();124 int iCount = 0;125 126 iCount = x.Length/iLength;127 128 if (x.Length%iLength > 0)129 130 iCount += 1;131 132 133 int X = 0;134 135 for (int i = 0; i < iCount; i+)136 137 if (i + 1)*iLength &

10、gt; x.Length)138 139 X = Convert.ToInt32(x.Substring(i*iLength, (x.Length - iLength);140 141 else142 143 X = Convert.ToInt32(x.Substring(i*iLength, iLength);144 145 int j = 0;146 long a, b = 0;147 while (X > 0)148 149 a = X%10;150 X = X/10;151 b = b + a*Pow(2, j);152 j+;153 154 sb.AppendFormat(0:

11、D2, b);155 156 return sb.ToString();157 158 159 / <summary>160 / 二进制转换为十六进制，定长转换161 / </summary>162 / <param name=x></param>163 / <param name=iLength></param>164 / <returns></returns>165 public static string BinToHex(string x, short iLength)166 167 Str

12、ingBuilder sb = new StringBuilder();168 int iCount = 0;169 170 iCount = x.Length/iLength;171 172 if (x.Length%iLength > 0)173 174 iCount += 1;175 176 177 int X = 0;178 179 for (int i = 0; i < iCount; i+)180 181 if (i + 1)*iLength > x.Length)182 183 X = Convert.ToInt32(x.Substring(i*iLength,

13、 (x.Length - iLength);184 185 else186 187 X = Convert.ToInt32(x.Substring(i*iLength, iLength);188 189 int j = 0;190 long a, b = 0;191 while (X > 0)192 193 a = X%10;194 X = X/10;195 b = b + a*Pow(2, j);196 j+;197 198 /前补0199 sb.Append(DecToHex(b.ToString();200 201 return sb.ToString();202 203 204

14、/ <summary>205 / 八进制转换为十进制206 / </summary>207 / <param name=x></param>208 / <returns></returns>209 public static string OctToDec(string x)210 211 string z = null;212 int X = Convert.ToInt32(x);213 int i = 0;214 long a, b = 0;215 while (X > 0)216 217 a = X%10;21

15、8 X = X/10;219 b = b + a*Pow(8, i);220 i+;221 222 z = Convert.ToString(b);223 return z;224 225 226 227 / <summary>228 / 十六进制转换为十进制229 / </summary>230 / <param name=x></param>231 / <returns></returns>232 public static string HexToDec(string x)233 234 if (string.IsN

16、ullOrEmpty(x)235 236 return 0;237 238 string z = null;239 Stack a = new Stack();240 int i = 0, j = 0, l = x.Length;241 long Tong = 0;242 while (i < l)243 244 a.Push(ToDec(Convert.ToString(xi);245 i+;246 247 while (a.Count != 0)248 249 Tong = Tong + Convert.ToInt64(a.Pop()*Pow(16, j);250 j+;251 25

17、2 z = Convert.ToString(Tong);253 return z;254 255 256 #endregion /Helperfunctions257 258 / <summary>259 / 260 / </summary>261 / <param name=x></param>262 / <param name=y></param>263 / <returns></returns>264 private static long Pow(long x, long y)265 26

18、6 int i = 1;267 long X = x;268 if (y = 0)269 return 1;270 while (i < y)271 272 x = x*X;273 i+;274 275 return x;276 277 278 / <summary>279 / 280 / </summary>281 / <param name=x></param>282 / <returns></returns>283 private static string ToDec(string x)284 285 swi

19、tch (x)286 287 case A:288 return 10;289 case B:290 return 11;291 case C:292 return 12;293 case D:294 return 13;295 case E:296 return 14;297 case F:298 return 15;299 default:300 return x;301 302 303 304 / <summary>305 / 306 / </summary>307 / <param name=x></param>308 / <ret

20、urns></returns>309 private static string ToHex(string x)310 311 switch (x)312 313 case 10:314 return A;315 case 11:316 return B;317 case 12:318 return C;319 case 13:320 return D;321 case 14:322 return E;323 case 15:324 return F;325 default:326 return x;327 328 329 330 / <summary>331 /

21、 将16进制BYTE数组转换成16进制字符串332 / </summary>333 / <param name=bytes></param>334 / <returns></returns>335 public static string ToHexString(byte bytes) / 0xae00cf => AE00CF 336 337 string hexString = string.Empty;338 if (bytes != null)339 340 StringBuilder strB = new StringB

22、uilder();341 342 for (int i = 0; i < bytes.Length; i+)343 344 strB.Append(bytesi.ToString(X2);345 346 hexString = strB.ToString();347 348 return hexString;349 1 / <summary> 2 / 3 / </summary> 4 / <param name=bytes></param> 5 / <param name=iLength></param> 6 / &

23、lt;returns></returns> 7 public static string ToHexString(byte bytes, int iLength) / 0xae00cf => AE00CF 8 9 string hexString = string.Empty; 10 if (bytes != null) 11 12 StringBuilder strB = new StringBuilder(); 13 14 if (bytes.Length < iLength) 15 16 iLength = bytes.Length; 17 18 19 fo

24、r (int i = 0; i < iLength; i+) 20 21 strB.Append(bytesi.ToString(X2); 22 23 hexString = strB.ToString(); 24 25 return hexString; 26 27 28 / <summary> 29 / 将byte数组转换为16进制字符串 30 / </summary> 31 / <param name=bytes>要转换的数组</param> 32 / <param name=iStart>数组下标</param&g

25、t; 33 / <param name=iLength>长度</param> 34 / <returns></returns> 35 public static string ToHexString(byte bytes, int iStart, int iLength) / 0xae00cf => AE00CF 36 37 string hexString = string.Empty; 38 if (bytes != null) 39 40 StringBuilder strB = new StringBuilder(); 41 42

26、/缓冲区长度问题，需清空缓冲区 43 if (bytes.Length < (iLength + iStart) 44 45 iLength = bytes.Length; 46 47 48 for (int i = iStart; i < iLength + iStart; i+) 49 50 strB.Append(bytesi.ToString(X2); 51 52 hexString = strB.ToString(); 53 54 return hexString; 55 56 57 / <summary> 58 / 59 / </summary>

27、 60 / <param name=hexString></param> 61 / <param name=discarded></param> 62 / <returns></returns> 63 public static byte GetBytes(string hexString, out int discarded) 64 65 discarded = 0; 66 string newString = ; 67 char c; 68 / remove all none A-F, 0-9, characters

28、69 for (int i = 0; i < hexString.Length; i+) 70 71 c = hexStringi; 72 if (Uri.IsHexDigit(c) 73 newString += c; 74 else 75 discarded+; 76 77 / if odd number of characters, discard last character 78 if (newString.Length%2 != 0) 79 80 discarded+; 81 newString = newString.Substring(0, newString.Length - 1); 82 83 84 return HexToByte(newString); 85 86 87 / <summary> 88 / Converts from binary coded decimal to integer 89 / </summary> 90 / <param name=num></param&