C# 生成唯一订单号

根据guid+datetime.now.ticks生产唯一订单号

 1     /// <summary>
 2     /// 生成唯一数
 3     /// </summary>
 4     public class uniquedata
 5     {
 6         private static object obj = new object();
 7         private static int guidint { get { return guid.newguid().gethashcode(); } }
 8         private static string guidintstr { get { return math.abs(guidint).tostring(); } }
 9 
10         /// <summary>
11         /// 生成
12         /// </summary>
13         /// <param name="mark">前缀</param>
14         /// <param name="timetype">时间精确类型  1 日,2 时,3 分，4 秒(默认) </param>
15         /// <param name="id">id 小于或等于0则随机生成id</param>
16         /// <returns></returns>
17         public static string gener(string mark, int timetype = 4, int id = 0)
18         {
19             lock (obj)
20             {
21                 var number = mark;
22                 var ticks = (datetime.now.ticks - guidint).tostring();
23                 int fillcount = 0;//填充位数
24 
25                 number += gettimestr(timetype, out fillcount);
26                 if (id > 0)
27                 {
28                     number += ticks.substring(ticks.length - (fillcount + 3)) + id.tostring().padleft(10, '0');
29                 }
30                 else
31                 {
32                     number += ticks.substring(ticks.length - (fillcount + 3)) + guidintstr.padleft(10, '0');
33                 }
34                 return number;
35             }
36         }
37 
38         /// <summary>
39         /// 生成
40         /// </summary>
41         /// <param name="mark">前缀</param>
42         /// <param name="timetype">时间精确类型  1 日,2 时,3 分，4 秒(默认)</param>
43         /// <param name="id">id 小于或等于0则随机生成id</param>
44         /// <returns></returns>
45         public static string generlong(string mark, int timetype = 4, long id = 0)
46         {
47             lock (obj)
48             {
49                 var number = mark;
50                 var ticks = (datetime.now.ticks - guidint).tostring();
51                 int fillcount = 0;//填充位数
52 
53                 number += gettimestr(timetype, out fillcount);
54                 if (id > 0)
55                 {
56                     number += ticks.substring(ticks.length - fillcount) + id.tostring().padleft(19, '0');
57                 }
58                 else
59                 {
60                     number += guidintstr.padleft(10, '0') + ticks.substring(ticks.length - (9 + fillcount));
61                 }
62                 return number;
63             }
64         }
65 
66         /// <summary>
67         /// 获取时间字符串
68         /// </summary>
69         /// <param name="timetype">时间精确类型  1 日,2 时,3 分，4 秒(默认)</param>
70         /// <param name="fillcount">填充位数</param>
71         /// <returns></returns>
72         private static string gettimestr(int timetype, out int fillcount)
73         {
74             var time = datetime.now;
75             if (timetype == 1)
76             {
77                 fillcount = 6;
78                 return time.tostring("yyyymmdd");
79             }
80             else if (timetype == 2)
81             {
82                 fillcount = 4;
83                 return time.tostring("yyyymmddhh");
84             }
85             else if (timetype == 3)
86             {
87                 fillcount = 2;
88                 return time.tostring("yyyymmddhhmm");
89             }
90             else
91             {
92                 fillcount = 0;
93                 return time.tostring("yyyymmddhhmmss");
94             }
95         }
96     }