1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Threading;
 6 
 7 namespace Qxun.Framework.Utility
 8 {
 9     public class CreateOrderNo
10     {
11         /// <summary>
12         /// 订单格式：时间加随机数+线程ID
13         /// 因为像并发或者超快进入或者其他情况，导致订单号一致的时候，根据线程ID比较分得开一些
14         /// </summary>
15         /// <param name="count">随机数个数,默认3个</param>
16         /// <param name="timeFormat">默认时间精确到毫秒</param>
17         /// <returns>订单string</returns>
18         public static string DateTimeAndNumber(int count = 3, string timeFormat = "yyyyMMddHHmmssFFF")
19         {
20             string threadID= Thread.CurrentThread.ManagedThreadId.ToString().PadLeft(4,‘0‘);
21             string time = string.Format("{0:" + timeFormat + "}", DateTime.Now).PadRight(timeFormat.Length,‘0‘);
22             List<int> number = new List<int>() { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 };
23             string numberList = string.Join("", Collection.Random(number, count));
24             return string.Format("{0}{1}{2}", time, numberList,threadID);
25         }
26     }
27 }