Question

我试图用System.Threading.Timer替换Thread.Sleep，我试图在下面的代码中实现它。更改的主要原因是，即使它在本地测试时有效，但它在服务器中无法正常工作。另外，我已经读过在这里使用它是不好的做法。

我已经看过几个例子（包括下面的例子），但我不确定如何在我的案例中使用它：System.Threading.Timer in C# it seems to be not working. It runs very fast every 3 second

在我的控制台应用中，我需要每15分钟将文件复制到我们的服务器。所以在：20，：35，：50，：05，我开始阅读该季度的文件。在下面的情况中，文件将在以下位置获得：45，我添加5分钟以防万一。

这是我的代码。我曾经尝试过并行复制几个季度的文件，但源文件所在的服务器却遇到了麻烦。所以我要回到这一点。

我的问题是，如何在此示例中用System.Threading.Timer替换Thread.Sleep？

我想尝试await Task.Delay(Int32)，但我有VS2010：

DateTime lastTimeRead = new DateTime(2014, 9, 9, 8, 35, 0);  //Last read at 8:35AM
DateTime nextTimeRead; 
for (; ; )
{
    now = DateTime.Now;  //It's currently 8:43AM
    nextTimeRead = LastTimeRead.AddMinutes(15);  // nextTimeRead = 8:50AM.
    if (nextTimeRead > now) //Yes, so wait 7 minutes for files to be available
    {
        TimeSpan span = nextTimeRead.Subtract(now);
        Double milliseconds = span.TotalMilliseconds;
        Console.WriteLine("Sleep for milliseconds: " + milliseconds.ToString());
        Thread.Sleep(Convert.ToInt32(milliseconds));
        Console.WriteLine("Download files after sleep of: " + nextTimeRead.ToString());
        DownloadFilesByPeriod(nextTimeRead);
    }
    else // Files are available. Read.
    {
        Console.WriteLine("Download files no sleep: " + nextTimeRead.ToString());
        DownloadFilesByPeriod(nextTimeRead);
    }
    LastTimeRead = nextTimeRead;
}

Answer 1

想法是设置计时器，并在想要设置程序中的延迟时启用它：

System.Timers.Timer Delay = new System.Timers.Timer();
Delay.Elapsed += new System.Timers.ElapsedEventHandler(Delay_Elapsed);
Delay.Interval=Convert.ToInt32(milliseconds);
Delay.Enabled = false;

 void Delay_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
  {
    Delay.Enabled = false; 
  }
......
.....
if (nextTimeRead > now) //Yes, so wait 7 minutes for files to be available
    {
        TimeSpan span = nextTimeRead.Subtract(now);
        Double milliseconds = span.TotalMilliseconds;
        Console.WriteLine("Sleep for milliseconds: " + milliseconds.ToString());
        Delay.Enabled = true;
        while (Delay.Enabled)
        {
          ////Wait until time passes
        }
        Console.WriteLine("Download files after sleep of: " + nextTimeRead.ToString());
        DownloadFilesByPeriod(nextTimeRead);
    }

用System.Threading.Timer替换Thread.Sleep？

1 个答案: