Error: No overload for <method> matches delegate 'System.EventHandler'

Hello fellows,
I keep getting the error:
"No overload for 'comPort1_DataReceived' matches delegate 'System.EventHandler'"
Anyone knows what's wrong?
Thanks.
I have 2 methods reading from 2 serial ports.
I wish to have a watchdog timer that will activate the other port if a port does not get data within certain time.
(Normally, if data was received, it will reset the timer for each data cycle. If the timer does not resets (Stop) within certain time (no data), we open the other port).
Here is what I have: (in general terms...)
System.Windows.Forms.Timer wait= new System.Windows.Forms.Timer();
private void comPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
//some code
}
public void comPort2_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
if wait.Interval> {do something}
wait.Tick += new EventHandler(comPort1_DataReceived);
wait.Interval = 500;
wait.Start();
// Code
wait.Stop();
}

1 Reply

Know the answer? Post it — somebody with the same question will find it here.

Zoran Horvat16y ago
You have mixed up event handlers. DataReceived event is handled by SerialDataReceivedEventHandler, while Timer's Tick event is handled by regular EventHandler. You can't supply comPort1_DataReceived as argument to EventHandler constructor, because comPort1_DataReceived doesn't comply expected signature.