C# WebService中任务处理线程创建子线程后

protected void WriteLog(string message)
{
lock (lockObject)
{
var file = System.IO.File.AppendText("C:\\log.txt");
file.WriteLine(message);
file.Close();
}
}

protected void asyctest(int threadid)
{

this.WriteLog(string.Format("主线程({0})的子线程({1})开始", threadid, AppDomain.GetCurrentThreadId()));

System.Threading.Thread.Sleep(10000);

ProcessThread thread = this.GetThreadbyID(threadid);

this.WriteLog(string.Format("主线程({0}: state: {1})的子线程({2})结束", threadid, thread == null ? -1 : (int)thread.ThreadState, AppDomain.GetCurrentThreadId()));

}

protected ProcessThread GetThreadbyID(int id)
{
foreach (ProcessThread item in System.Diagnostics.Process.GetCurrentProcess().Threads)
{
if (item.Id == id)
{
return item;
}
}

return null;
}

protected delegate void delegatetest(int threadid);

[WebMethod]
public void test()
{
this.WriteLog(string.Format("主线程({0})开始", AppDomain.GetCurrentThreadId()));

for (int i = 0; i < 10; i++)
{
delegatetest currentDaliyCollect = new delegatetest(asyctest);
IAsyncResult iADaliyCollect = currentDaliyCollect.BeginInvoke(AppDomain.GetCurrentThreadId(), null, null);
if (iADaliyCollect.IsCompleted)
{
currentDaliyCollect.EndInvoke(iADaliyCollect);
}

}
}

　　

结论：

C# WebService中任务处理线程创建子线程后，此任务处理线程并没有退出销毁，而是ThreadState切换成Wait状态，所以子线程也不会被中止，而得以继续执行。

本来是想验证，父线程退出后，子线程是否会被强制中止。时间关系没有验证，至少验证了在webservice，不用担心在rpc方法中创建的子线程会被中止。