《C#并行编程高级教程》第3章 命令式任务并行 笔记

Task的使用

var t1 = new Task(() => GenerateAESKeys());
var t2 = new Task(() => GenerateMD5Hashes());
// Start the tasks
t1.Start();
t2.Start();
// Wait for all the tasks to finish
Task.WaitAll(t1, t2);

等待超时

))
{
    //...
}

取消任务

使用CancellationToken，在取消时会抛出OperationCanceledException异常

; i <= NUM_AES_KEYS; i++)
    {
        aesM.GenerateKey();
        byte[] result = aesM.Key;
        string hexString = ConvertToHexString(result);
        // Console.WriteLine("AES KEY: {0} ", hexString);
        ct.ThrowIfCancellationRequested();
    }
}

异常处理

try
{
    //...
}
catch (AggregateException ex)
{
    foreach (Exception innerEx in ex.InnerExceptions)
    {
        Debug.WriteLine(innerEx.ToString());
        // Do something considering the innerEx Exception
    }
}

任务返回值

使用Task<TResult>创建的任务在Reault属性中可以保存返回值

var cts ; i ; i ] == prefix)
        {
            keysList.Add(hexString);
        }
        if (ct.IsCancellationRequested)
        {
            ct.ThrowIfCancellationRequested();
        }
    }
    return keysList;
}

串联任务

var cts ; i < t.Result.Count; i++)
    {
        Console.WriteLine(t.Result[i]);
    }
});

 

来自为知笔记(Wiz)