获取多线程中的线程状态

Question

我已经动态创建了线程.

static void Main(string[] args)
{

    int ThreadCount =Convert.ToInt32ConfigurationManager.AppSettings["Threads"]);
    List<Thread> th = new List<Thread>();
    for (int i = 0; i < ThreadCount; i++)
    {
      Thread t = new Thread(print);
      th.Add(t);
    }
    foreach (Thread t in th)
    {
       t.Start();
    }
 }
 public static void print()
 {
    console.writeline("123");
 }

我想知道这个线程何时完成.完成这些线程后,我想打印一条"DONE"的消息

我怎样才能做到这一点.

Answer 1

Thread.Join()可以提供帮助; 请参阅http://msdn.microsoft.com/en-us/library/95hbf2ta.aspx.

foreach (var t in th)
   t.Join();

Console.WriteLine("DONE");

您可能希望查看更高级别的TPL(任务并行库)API; 请参阅http://msdn.microsoft.com/en-us/library/dd537609.aspx.从长远来看,它可能更容易使用.

var tasks[] = new Task[n];
for (int i = 0; i < n; ++i)
{
   tasks[i] = new Task(() => Console.WriteLine(123));
   tasks[i].Start();
}

Tasks.WaitAll(tasks);
Console.WriteLine("DONE");

或者在PLINQ中,http://msdn.microsoft.com/en-us/library/dd460688.aspx,(尚未编译代码)

Parallel.ForEach(Enumerable.Range(1, n), i => Console.WriteLine(i));
Console.WriteLine("DONE");