当另一个线程正在执行任务时暂停线程

本文关键字：线程 暂停 执行任务 另一个 | 更新日期: 2023-09-27 18:11:32

我创建了一个执行任务的线程，但是我需要暂停我的主线程，直到我的次级线程结束任务。

    private void AquilesPL_Load(object sender, EventArgs e)
    {
       ThreadStart ts = new ThreadStart(RunTask)
       Thread t = new Thread(ts);
       t.Start();
       SomeFunction1();
       SomeFunction2();
       //I need to pause the main thread here, if runtask() continue working
       //if runt task ends, this main thread must to continue.
       ReadFile();
       CloseProgram();
    }
    private void RunTask()
    {
        //Some code that write a file 
        //RunTaskfunction ends, and i have to continue 
    }
    private void ReadFile()
    {
        //Reading the file, this file has been written by RunTask
    }

当另一个线程正在执行任务时暂停线程

但是我需要暂停我的主线程，直到我的次要线程结束任务。

这通常是一个坏主意。一个更好的解决方案是在任务执行时禁用UI，然后在任务完成时重新启用它。

TPL和async/await使得这相当简单。例如:

private async void AquilesPL_Load(object sender, EventArgs e)
{
   var task = Task.Run(() => RunTask());
   SomeFunction1();
   SomeFunction2();
   // Disable your UI controls
   await task; // This will wait until the task completes, 
               // but do it asynchronously so it does not block the UI thread
   // This won't read until the other task is done
   ReadFile();
   // Enable your UI controls here
}

如果你不能使用c# 5，你可以通过。net 4和TPL:

private void AquilesPL_Load(object sender, EventArgs e)
{
   var task = Task.Factory.StartNew(() => RunTask());
   SomeFunction1();
   SomeFunction2();
   // Disable your UI controls
   task.ContinueWith(t =>
   {
       // This won't read until the other task is done
       ReadFile();
       // Enable your UI controls here
   }, TaskScheduler.FromCurrentSynchronizationContext());
}
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