思路：前15位是有时间串组成,后三位是由3位随机数组成：yyyyMMddHHmmssf+xxx
生成随机数的类如下：
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Diagnostics; using System.Collections; namespace WindowsFormsApplication5 { public class IDTest { private static readonly object SequenceLock = new object(); ////// 生成18位不重复的ID号 /// /// public Int64 CreateID() { lock (SequenceLock) { Int64 id = -1; Random random = new Random(); int d = GetNumber(); string strTimeSpan = DateTime.Now.ToString("yyyyMMddHHmmssf") + d.ToString(); Trace.WriteLine("createID="+strTimeSpan); Int64.TryParse(strTimeSpan, out id); return id; } } /// /// 测试函数 /// /// public bool Execute() { Int64 tempValue = CreateID(); return true; } /// /// 得到3位随机数 /// /// public int GetNumber() { Random ra = new Random(unchecked((int)DateTime.Now.Ticks)); int[] arrNum = new int[10]; int tmp = 0; int minValue = 100; int maxValue = 999; for (int i = 0; i < 999; i++) { tmp = ra.Next(minValue, maxValue); //随机取数 tmp = getNum(arrNum, tmp, minValue, maxValue, ra); //取出值赋到数组中 } return tmp; } /// /// 检测是否有重复的随机数 /// /// /// /// /// /// /// public int getNum(int[] arrNum, int tmp, int minValue, int maxValue, Random ra) { int n = 0; while (n <= arrNum.Length - 1) { if (arrNum[n] == tmp) //利用循环判断是否有重复 { tmp = ra.Next(minValue, maxValue); //重新随机获取。 getNum(arrNum, tmp, minValue, maxValue, ra);//递归:如果取出来的数字和已取得的数字有重复就重新随机获取。 } n++; } return tmp; } } } 使用了园子里的多线程测试类，原文：
http://www.cnblogs.com/moozi/archive/2011/04/16/2018435.html
using System; using System.Collections.Generic; using System.Diagnostics; using System.Threading; namespace WindowsFormsApplication5 { ////// 并发测试 /// public class ConcurrentTest : IDisposable { #region 私有方法 /// /// 测试方法所在的接口 /// private Func<bool> func; /// /// 主线程控制信号 /// private ManualResetEvent manualResetEvent; /// /// 测试线程控制信号 /// private ManualResetEvent threadResetEvent; /// /// 待执行的线程数 /// private List<int> threads; /// /// 测试结果 /// private List results; /// /// 执行测试的成功数 /// private int successCount; /// /// 执行测试的失败数 /// private int failureCount; /// /// 测试耗时 /// private long elapsedMilliseconds; /// /// 当前线程 /// private int currentIndex; /// /// 当前测试的总线程数 /// private int currentCount; /// /// 思考时间 /// private int thinkTime; /// /// 重复次数 /// private int repeatCount; /// /// 测试计时器 /// private Stopwatch stopwatch; #endregion #region 构造函数 /// /// 构造函数 /// public ConcurrentTest() { manualResetEvent = new ManualResetEvent(true); threadResetEvent = new ManualResetEvent(true); stopwatch = new Stopwatch(); } #endregion #region 执行测试 /// /// 执行多线程测试 /// /// 需要测试的线程数 /// 待执行方法 /// public List Execute(int threadCount, Func<bool> func) { return Execute(threadCount, 1, func); } /// /// 执行多线程测试 /// /// 需要测试的线程数 /// 重复次数 /// 待执行方法 /// public List Execute(int threadCount, int repeatCount, Func<bool> func) { return Execute(threadCount, 0, repeatCount, func); } /// /// 执行多线程测试 /// /// 需要测试的线程数 /// 思考时间，单位耗秒 /// 重复次数 /// 待执行方法 /// public List Execute(int threadCount, int thinkTime, int repeatCount, Func<bool> func) { return Execute(new List<int>() { threadCount }, thinkTime, repeatCount, func); } /// /// 执行多线程测试 /// /// 分别需要测试的线程数 /// 思考时间，单位耗秒 /// 重复次数 /// 待执行方法 /// public List Execute(List<int> threads, int thinkTime, int repeatCount, Func<bool> func) { this.func = func; this.threads = threads; this.thinkTime = thinkTime; this.repeatCount = repeatCount; CheckParameters(); CreateMultiThread(); return this.results; } #endregion #region 验证参数 /// /// 验证参数 /// private void CheckParameters() { if (func == null) throw new ArgumentNullException("func不能为空"); if (threads == null || threads.Count == 0) throw new ArgumentNullException("threads不能为空或者长度不能为0"); if (thinkTime < 0) throw new Exception("thinkTime不能小于0"); if (repeatCount <= 0) throw new Exception("repeatCount不能小于等于0"); } #endregion #region 创建多线程并执行测试 /// /// 创建多线程进行测试 /// private void CreateMultiThread() { results = new List (threads.Count); foreach (int threadCount in threads) { for (int repeat = 0; repeat < repeatCount; repeat++) { //主线程进入阻止状态 manualResetEvent.Reset(); //测试线程进入阻止状态 threadResetEvent.Reset(); stopwatch.Reset(); currentCount = threadCount; currentIndex = 0; successCount = 0; failureCount = 0; elapsedMilliseconds = 0; for (int i = 0; i < currentCount; i++) { Thread t = new Thread(new ThreadStart(DoWork)); t.Start(); } //阻止主线程，等待测试线程完成测试 manualResetEvent.WaitOne(); results.Add(new ConcurrentTestResult() { FailureCount = failureCount, SuccessCount = successCount, ElapsedMilliseconds = elapsedMilliseconds }); Thread.Sleep(thinkTime); } } } /// /// 执行测试方法 /// private void DoWork() { bool executeResult; Interlocked.Increment(ref currentIndex); if (currentIndex < currentCount) { //等待所有线程创建完毕后同时执行测试 threadResetEvent.WaitOne(); } else { //最后一个线程创建完成，通知所有线程，开始执行测试 threadResetEvent.Set(); //开始计时 stopwatch.Start(); } //执行测试 executeResult = func(); Interlocked.Decrement(ref currentIndex); if (currentIndex == 0) { //最后一个线程执行的测试结束，结束计时 stopwatch.Stop(); elapsedMilliseconds = stopwatch.ElapsedMilliseconds; //保存测试结果 if (executeResult) Interlocked.Increment(ref successCount); else Interlocked.Increment(ref failureCount); //通知主线程继续 manualResetEvent.Set(); } else { //保存测试结果 if (executeResult) Interlocked.Increment(ref successCount); else Interlocked.Increment(ref failureCount); } } #endregion #region 释放资源 /// /// 释放资源 /// public void Dispose() { manualResetEvent.Close(); threadResetEvent.Close(); } #endregion } /// /// 并发测试结果 /// public class ConcurrentTestResult { /// /// 当前执行线程总数 /// public int ThreadCount { get { return SuccessCount + FailureCount; } } /// /// 测试成功数 /// public int SuccessCount { get; set; } /// /// 测试失败数 /// public int FailureCount { get; set; } /// /// 总耗时 /// public long ElapsedMilliseconds { get; set; } } }
测试方法：
using (ConcurrentTest concurrentTest = new ConcurrentTest()) { var result = concurrentTest.Execute(2, new IDTest().Execute); foreach (var item in result) { Console.WriteLine("线程数：{0}\t成功：{1}\t失败：{2}\t耗时：{3}", item.ThreadCount, item.SuccessCount, item.FailureCount, item.ElapsedMilliseconds); } }
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