关于线程的参数(2.0)、“返回值”、及线程的中止
1.线程的参数:
有时候会想向辅助线程传递些信息,这里需要用到parameterizedthreadstart 委托
示例:
private void btrunthread_click(object sender, eventargs e)
{
thread t = new thread(new parameterizedthreadstart(this.threadrun));
t.start(100);
}
private void threadrun(object o)
{
this.lbcompleted.invoke((methodinvoker)delegate { this.lbcompleted.text = system.convert.tostring(o); });
}
2.通过代理可以大致实现类似功能,示例:
class program
{
static void main(string[] args)
{
threadclass tc = new threadclass(new mydlg(dlgmethod));
thread thread = new thread(new threadstart(tc.threadrun));
console.writeline("second thread start");
thread.start();
thread.join();
console.writeline("second thread completed");
console.read();
}
private static void dlgmethod(int i)
{
console.writeline("second thread result:{0}", i);
}
}
public delegate void mydlg(int i);
class threadclass
{
private mydlg mydlg;
public threadclass(mydlg pdlg)
{
this.mydlg = pdlg;
}
public void threadrun()
{
int total = 0;
for (int i = 0; i < 100; i++)
{
total += i;
}
if (mydlg != null)
{
mydlg(total);
}
}
}
3.线程的中止:
(1).join方法
msdn注释:在继续执行标准的 com 和 sendmessage 消息泵处理期间,阻止调用线程,直到某个线程终止为止。
看得一头雾,自己试了一下,似乎线程在调用join方法之后,该线程抢占了所有的cpu时间,直到线程的任务完成。不知道是这是这样?
(2).abort方法
立即中止线程
(3).定义标识量
示例:
class program
{
private static bool stop;
static void main(string[] args)
{
stop = false;
thread t = new thread(new threadstart(threadrun));
t.start();
thread.sleep(100);
stop = true;
console.read();
}
static void threadrun()
{
while (!stop)
{
console.writeline("do some work...");
}
}
}
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