C#多线程中的异常处理操作示例

static void Main(string[] args)
{
  ThreadStart threadStart = DoWork;
  Thread thread = new Thread(threadStart);
  thread.Start();
  thread.Join();
}
static void DoWork()
{
  try
  {
    throw new Exception("子线程出现异常了");
  }
  catch (Exception ex)
  {
    Trace.Assert(false, "Catch In Delegate");
  }
}

try
{
  task.Wait();
}
catch (AggregateException ex)
{
  Console.WriteLine($"Error: {ex.GetType().Name}");
  foreach (Exception item in ex.InnerExceptions)
  {
    Console.WriteLine($"{item.GetType().Name}, {item.Message}");
  }
}

static void Main(string[] args)
{
  Task task = Task.Run(() => throw new Exception("前驱任务异常了"));
  Task faultedTask = task.ContinueWith(antecedentTask =>
  {
    antecedentTask.Exception.Handle(eachE =>
    {
      Console.WriteLine($"Error: {eachE.Message}");
      return true;
    });
  },TaskContinuationOptions.OnlyOnFaulted);
  faultedTask.Wait();
}

static void Main(string[] args)
{
  Task task = new Task(() =>
  {
    Console.WriteLine("前驱动任务执行中...");
  });
  Task faultedTask = task.ContinueWith(antecedentTask =>
  {
    Console.WriteLine("延续动任务执行中...");
  }, TaskContinuationOptions.OnlyOnFaulted);
  task.Start();
  try
  {
    faultedTask.Wait();
  }
  catch (AggregateException ex)
  {
    Console.WriteLine($"Error: {ex.GetType().Name}");
    foreach (Exception item in ex.InnerExceptions)
    {
      Console.WriteLine($"{item.GetType().Name}, {item.Message}");
    }
  }
  Console.WriteLine($"前驱任务状态{task.Status}");
  Console.WriteLine($"延续任务状态{faultedTask.Status}");
}

static void Main(string[] args)
{
  Task task = Task.Run(()
    =>
  throw new Exception("前驱任务异常了"));
  Task task1 = task.ContinueWith(antecedentTask =>
  {
    throw new Exception("延续任务1异常了");
  });
  Task task2 = task1.ContinueWith(antecedentTask =>
  {
    throw new Exception("延续任务2异常了");
  });
  Task task3 = task2.ContinueWith(antecedentTask =>
  {
    throw new Exception("延续任务3异常了");
  });
  try
  {
    task3.Wait();
  }
  catch (AggregateException ex)
  {
    Console.WriteLine($"Error: {ex.GetType().Name}");
    foreach (Exception item in ex.InnerExceptions)
    {
      Console.WriteLine($"{item.GetType().Name}, {item.Message}");
    }
  }
}

static void Main(string[] args)
{
  CancellationTokenSource cancellationTokenSource = new CancellationTokenSource();
  cancellationTokenSource.Token.Register(() => 
  {
    Console.WriteLine("任务取消了");
  });
  cancellationTokenSource.CancelAfter(2000);
  Task task = Task.Run(() =>
  {
    while (true && !cancellationTokenSource.IsCancellationRequested)
    {
      Console.WriteLine("任务执行中...");
      Thread.Sleep(300); 
    }
  },
  cancellationTokenSource.Token);
  task.Wait();
  Console.WriteLine($"任务的最终状态是:{task.Status}");
}