exceptionhandler

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在task执行完处理异常

处理异常1

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var task1 = Task.Run(() =>
{
    Console.WriteLine(1223);
    // throw new CustomException("task1 faulted.");
}).ContinueWith(t => {
    Console.WriteLine("{0}: {1}",
        t.Exception.InnerException.GetType().Name,
        t.Exception.InnerException.Message);
}, TaskContinuationOptions.OnlyOnFaulted);
Thread.Sleep(500);
// 当发生异常时执行ContinueWith

在task执行结束 主线程内处理异常

处理异常2

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var tt = Task.Factory.StartNew(() => throw new ArgumentException());
while (!tt.IsCompleted){} // tt.Wait()
var excoCollection = tt.Exception?.InnerExceptions;

处理异常3

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var task1 = Task.Run(() => { throw new CustomException("This exception is expected!"); });
while (!task1.IsCompleted) { }
if (task1.Status == TaskStatus.Faulted)
{
    foreach (var e in task1.Exception.InnerExceptions)
    {
        // 处理自定义异常
        if (e is CustomException)
        {
            Console.WriteLine(e.Message);
        }
        // 抛去其他异常
        else{throw e;}
    }
}

如果不想等到task结束