Question

我的代码基本上是这样的：

Parallel.Foreach(items,dbItem=>
{
  int counter = 0; 
  Interlocked.Increment(ref counter);
  Console.WriteLine("Current counter state: " + counter);
});

我想在这里做的是简单地重新打印正在被激发的特定线程的计数器值：

Thread {0} - Current conter state: 1 << Value 1 gets re-printed every time this console.writeline occurs... ? 
Thread {1} - Current conter state: 1
Thread {2} - Current conter state: 1
Thread {3} - Current conter state: 1
Thread {4} - Current conter state: 1
Thread {5} - Current conter state: 1

这是可行的，如果是这样的话？

P.S。我重新打印的值是在每个线程上显示计数器的当前值而不用新的console.writeline并用一堆相同的文本向我的控制台发送垃圾邮件......

P.S。 2，伙计这是所需的输出：

   Thread {1} - Current conter state: >>2<< this value here gets updated

无需在控制台中执行此类操作：

   Thread {1} - Current conter state: 1
   Thread {1} - Current conter state: 2
   Thread {1} - Current conter state: 3
   Thread {1} - Current conter state: 4
   Thread {1} - Current conter state: 5

我只想在控制台应用程序中重新打印计数器值...

Answer 1

所以你需要在控制台中更新一个值？试试这段代码（它只是一个演示）：

var counters = new ConcurrentDictionary<string, int>();

var threads = Enumerable.Range(0, 5).Select(i => new Thread(() =>
{
    var key = $"Thread {i}";
    for (var j = 0; j < 10; ++j)
    {
        var counter = j;
        counters.AddOrUpdate(key, counter, (k, v) => counter);
        Thread.Sleep(200);
    }
})).ToList();
threads.ForEach(t => t.Start());

while (threads.Any(t => t.IsAlive))
{
    int line = 0;
    foreach (var counter in counters)
    {
        Console.SetCursorPosition(1, line++);
        Console.WriteLine($"{counter.Key} - {counter.Value}");
        Thread.Sleep(50);
    }
}

打印出控制台应用程序c＃中单独线程的当前状态

1 个答案: