C#_取隨機字元

標籤：

1.多位元字字母組成,每位取值0-9A-Z

 1     /// <summary> 2     /// 擷取下一個順序碼根據上一個(數字字母組合) 3     /// </summary> 4     /// <param name="str">上一個順序碼</param> 5     /// <returns></returns> 6     public static string ESequenceCode(string code) 7     { 8         if (string.IsNullOrWhiteSpace(code)) 9         {10             return "";11         }12         code = code.ToUpper();13         int max = 90; int min = 48;14         //數組48-57英文65-90(大寫)/97-122(小寫)15         char[] strs = code.ToCharArray();16         ASCIIEncoding ascii = new ASCIIEncoding();17         for (int i = strs.Length - 1; i > -1; i--)18         {19             int ascII = ascii.GetBytes(strs[i].ToString())[0];20             int ascIINew = (ascII == max ? min : (ascII + (ascII == 57 ? 8 : 1)));21             byte[] byteArray = new byte[] { (byte)ascIINew };22             strs[i] = Convert.ToChar(ascii.GetString(byteArray));23             if (ascII != max)24             {25                 break;26             }27         }28         return string.Join("", strs);29     }

View Code

 

C#_取隨機字元