Question

I have a winform app, which shows some information in time, every time it loads the data, I set a delay time of 7 sec like this: System.Threading.Thread.Sleep(7000) so the info can be viewed. I want to have a buttom that allows me to jump to the next information without waiting.

The logic I use is as follows: get Information, if any, wait 7 sec, next data, and so on. So if I press the button I’d like to set that time to 0.

Is there any way to cancel the waiting period?

here is the code:

ManualResetEvent wait_handle = new ManualResetEvent(true);

{…}

private void TheLoop(object stateinfo)
    {
        bool hasInfo = true;            
        bool hasLines = GetLinesOnProduction();
        while (doLoop)
        {
            wait_handle.WaitOne();

            if (hasLines)
            {
                param1 = Lines[CurrentLine].line;
                param2 = Lines[CurrentLine].WO;

                //Here I query the DB for the CurrentLine Data                    
                ShowLineInformation(CurrentLine);
                ShowChartByHour(param1, param2, out hasInfo);
                if (hasInfo)
                    System.Threading.Thread.Sleep(7000);                                        
                //Here I move to the next line
                if (CurrentLine < Lines.Count - 1)
                    CurrentLine++;
                else
                {

                    CurrentLine = 0;  //Start all over again
                    hasLines = GetLinesOnProduction();
                }
            }
            else
            {
                System.Threading.Thread.Sleep(40000);  //(No Lines)Wait to query for lines again
                hasLines = GetLinesOnProduction();
            }
        }
    }

private void btnPauseResume_Click(object sender, EventArgs e)
    {
        if (btnPauseResume.Text == "Pause")
        {
            btnPauseResume.Text = "Resume";
            wait_handle.Reset();
        }
        else
        {
            btnPauseResume.Text = "Pause";
            wait_handle.Set();
        }
    }

Answer 1

Instead of doing Thread.Sleep, you can use a wait event, and simply set it to cancel the wait. Something like this:

var waiter = new AutoResetEvent(false);
bool wasCanceled = waiter.WaitOne(7000);
if(wasCanceled)
    // Jump to next...


// Cancel the wait from another thread
waiter.Set()