Having a problem at TimeSpan

Question

Hi i created a small download manager. I've done everything mostly but having a small problem at timespan. I was calculating left time remaining for the download to be completed. But i'm having a problem at this point : double secondsRemaining = ((100 - progressBar.Value) * sw.Elapsed.TotalSeconds / progressBar.Value); TimeSpan ts = TimeSpan.FromSeconds(secondsRemaining); What i get is TimeSpan overflowed because the duration is too long. I've tried so many formulas but non of them gives me the exact time left. After i edited the formula a lil bit i found that the problem is caused by the sign / divide. Thank you.

Vulpes · Answer

Your formula seems sound to me. However when progress.Value is still zero secondsRemaining will either by positive infinity or NaN and you will then get the overflow exception when you attempt to convert to a TimeSpan. What you therefore need to do is to check that progressBar.Value is greater than zero before applying this formula. If you must show a value for secondsRemaining when progress.Value is still zero then I'd hard-code an average value based on the time it has taken in the past to complete the operation.