Hi all,

I have tried to find an answer for my question on searching but I have not got a satisfied answer yet because this question requires experience about .net. Thanks in advance,

For my C# application I use 3 timers:
1. Timer 1: Tick every second (1000 ms), inside tick method, a counter_second++: thsi timer never stops
2. Timer 2: Tick every 20 ms is used for sending a command to serial port every 20 ms, and then stops to wait to receive reply
3. Timer 3: Tick every 100 ms: also never stops to check whether there is any response command from timer2 or not, if there is not, Retry to send from timer2 starts again.

I really dont understand clearly about timer, so my question is that if I use 3 timers like this, how about deadlock any other problems for this? because I think 3 timers are too much for one application, is it it?

Above 3 timer, I used Windows.Forms.Timer.

The second question is which one of following timers is the best to use:
System.Windows.Forms.Timer
System.Timers.Timer
System.Threading.Timer

with criteria such as:
1. perfomanace
2. memory
3. time consuming


Thanks in advance,

Joesy

Dear Feng Chen,

Thank you very much for your reply, it is very helpful though.

I still wonder:

I assume every job that every timer has to complete is 100%.

if timer1 is executing its job till 60%, then at this time timer2 ticks and wanna do its job but timer1 is executing ==> deadlock will occur here, so my question is that after timer completed, will timer2 continue with the waiting job?

Thanks in advance,

Kind regards,

Joesy