多线程，如何判断所有子线程都已经运行完毕（结束）

[emanlee]

下面开了多个线程，如何判断所有子线程都已经运行完毕？
Dim i As Integer = 0
For i = 0 To item_count
tmpEmail = lstAddress.Items(i).Text
tmpEmail = Trim(Left(tmpEmail, 50))
Dim start As System.Threading.ParameterizedThreadStart
start = New ParameterizedThreadStart(AddressOf SendEmail)
Dim t As Thread = New Thread(start)
t.Start(tmpEmail)

Next
开始运行前提示“正在**请稍候**”，所有线程结束之后，提示“完成。”

[wei123456]

If t.ThreadState = ThreadState.Stopped Then
'完成
EndIf

[emanlee]

up

[tianxiaoku]

that's not a bad question!

[platform]

1、写一个循环
2、给一个线程计数器；
3、给一个结束线程的方法；
4、循环等待技术为0

[platform]

myThread mThread = new myThread();
try
{
Console.Title = "博客搬家后台服务 --Sean Pu 2007.08.23)";
Parse.Cl("博客搬家后台服务开始运行...", ConsoleColor.DarkGreen);
mThread.MainThread(); //Start MainThread and MainThread start some child threads
XXX
mThread.TerminateThread();//terminate child threads
Parse.Cl("现在开始停止所有服务,请稍等片刻....");
while (myThread.ThreadNum != 0)
{
System.Threading.Thread.Sleep(100);
}
Console.Beep();
Parse.Cl("博客搬家后台服务停止完成.");
Parse.Cl("Press any key to continue... ...");
Console.ReadKey();
}

[重典]

我是在类中设一个Dictionary然后在线程函数中写状态进Dictionary在主函数中读。。。都是某状态就OK 了

[yuzl32]

采用WaitHandle等待所有线程执行完毕!

using System;
using System.Threading;

public sealed class App
{
// Define an array with two AutoResetEvent WaitHandles.
static WaitHandle[] waitHandles = new WaitHandle[]
{
new AutoResetEvent(false),
new AutoResetEvent(false)
};

// Define a random number generator for testing.
static Random r = new Random();

static void Main()
{

DateTime dt = DateTime.Now;
Console.WriteLine("Main thread is waiting for BOTH tasks to complete.");
ThreadPool.QueueUserWorkItem(new WaitCallback(DoTask), waitHandles[0]);
ThreadPool.QueueUserWorkItem(new WaitCallback(DoTask), waitHandles[1]);
WaitHandle.WaitAll(waitHandles);

Console.WriteLine("Both tasks are completed (time waited={0})",
(DateTime.Now - dt).TotalMilliseconds);

// Queue up two tasks on two different threads;
// wait until any tasks are completed.
dt = DateTime.Now;
Console.WriteLine();
Console.WriteLine("The main thread is waiting for either task to complete.");
ThreadPool.QueueUserWorkItem(new WaitCallback(DoTask), waitHandles[0]);
ThreadPool.QueueUserWorkItem(new WaitCallback(DoTask), waitHandles[1]);
int index = WaitHandle.WaitAny(waitHandles);
// The time shown below should match the shortest task.
Console.WriteLine("Task {0} finished first (time waited={1}).",
index + 1, (DateTime.Now - dt).TotalMilliseconds);
}

static void DoTask(Object state)
{
AutoResetEvent are = (AutoResetEvent) state;
int time = 1000 * r.Next(2, 10);
Console.WriteLine("Performing a task for {0} milliseconds.", time);
Thread.Sleep(time);
are.Set();
}
}

[wz_hzb]

CheckIp *checkrun[10];
for (int j=0;j<10 && !q1->Eof;j++)
{
MainForm->Memo2->Lines->Add(DateTimeToStr(Date()+Time())+" 检测 "+q1->FieldByName("ip")->AsString);
//MainForm->Label3->Caption=IntToStr(MainForm->Label3->Caption.ToInt()+1);
checkrun[j]=new CheckIp(false);
checkrun[j]->FreeOnTerminate=false;
checkrun[j]->ip=q1->FieldByName("ip")->AsString;
checkrun[j]->port=q1->FieldByName("port")->AsString.ToInt();
checkrun[j]->Resume();
q1->MoveBy(1);
}
for (;checkrun[0]->islive || checkrun[1]->islive || checkrun[2]->islive || checkrun[3]->islive || checkrun[4]->islive || checkrun[5]->islive || checkrun[6]->islive || checkrun[7]->islive || checkrun[8]->islive || checkrun[9]->islive;)
Sleep(1000);
delete checkrun;


__fastcall CheckIp::CheckIp(bool CreateSuspended)
: TThread(CreateSuspended)
{
islive=true;
}
//---------------------------------------------------------------------------
void __fastcall CheckIp::Execute()
{
//---- Place thread code here ----
//我的程序代码.....
islive=false;
return;
}