C#取M1卡物理卡号转成10进制

1、先将取出来的16进制卡号颠倒如F3 0C 4F 06转成06 4F 0C F3 （注意物理卡号是第0扇区的前4个字节）

2、将转换后的16进制卡号转成10进制，不足10位左补0

代码实现：

//调用:
GetM1CardNo("F30C4F06");

 1  private string GetM1CardNo(string cardNo16Code)
 2         {
 3             string cardNo = "";
 4             //十六进制反转
 5             int i = 0;
 6             string s = "";
 7             string[] arr = new string[cardNo16Code.Length / 2];
 8             foreach (var item in cardNo16Code)
 9             {
10                 s = s + item;
11                 i = i + 1;
12                 if (i % 2 == 0)
13                 {
14                     arr[i/2 -1] = s;
15                     s = "";
16                 }
17             }
18             Array.Reverse(arr);
19 
20             //转10进制，不足10左补0
21             cardNo = GetHexadecimalValue(string.Join("", arr)).ToString().PadLeft(10, '0');
22 
23             return cardNo;
24         }

 1  /// <summary>
 2         /// 十六进制换算为十进制
 3         /// </summary>
 4         /// <param name="strColorValue"></param>
 5         /// <returns></returns>
 6         public static int GetHexadecimalValue(String strColorValue)
 7         {
 8             char[] nums = strColorValue.ToCharArray();
 9             int total = 0;
10             try
11             {
12                 for (int i = 0; i < nums.Length; i++)
13                 {
14                     String strNum = nums[i].ToString().ToUpper();
15                     switch (strNum)
16                     {
17                         case "A":
18                             strNum = "10";
19                             break;
20                         case "B":
21                             strNum = "11";
22                             break;
23                         case "C":
24                             strNum = "12";
25                             break;
26                         case "D":
27                             strNum = "13";
28                             break;
29                         case "E":
30                             strNum = "14";
31                             break;
32                         case "F":
33                             strNum = "15";
34                             break;
35                         default:
36                             break;
37                     }
38                     double power = Math.Pow(16, Convert.ToDouble(nums.Length - i - 1));
39                     total += Convert.ToInt32(strNum) * Convert.ToInt32(power);
40                 }
41 
42             }
43             catch (System.Exception ex)
44             {
45                 String strErorr = ex.ToString();
46                 return 0;
47             }
48 
49 
50             return total;
51         }