"no overload for ... matches delegate..."

[bbranded]

Hello, This is my first attempt at writing an event handler. I am writing a simple packet capture utility utilizing a .NET interface to the WinPCap lib. However, I've come across an error and do not know how to solve it.

private void button1_Click(object sender, EventArgs e)
{
/* Retrieve the device list */
List<PcapDevice> devices = Pcap.GetAllDevices();

        //Extract a device from the list
        PcapDevice device = devices\[2\];
        //Register our handler function to the 'packet arrival' event
        device.OnPacketArrival += new SharpPcap.Pcap.PacketArrivalEvent(device\_PcapOnPacketArrival);
        //Open the device for capturing
        //true -- means promiscuous mode
        //1000 -- means a read wait of 1000ms
        device.Open(true, 1000);
        Console.WriteLine("-- Listenning on {0}, hit 'Enter' to stop...",
        device.Description);
        //Start the capturing process
        device.StartCapture();
        //Wait for 'Enter' from the user.
        Console.ReadLine();
        //Stop the capturing process
        device.StopCapture();
        //Close the pcap device
        device.Close();

    }

    private static void device\_PcapOnPacketArrival(object sender, SharpPcap.Packets.Packet packet)
    {
        DateTime time = packet.PcapHeader.Date;
        int len = packet.Header.Length;
        Console.WriteLine("{0}:{1}:{2},{3} Len={4}",
        time.Hour, time.Minute, time.Second, time.Millisecond, len);
    }

new SharpPcap.Pcap.PacketArrivalEvent(device_PcapOnPacketArrival) throws an error: "No overload for 'device_PcapOnPacketArrival' matches delegate 'SharpPcap.Pcap.PacketArrivalEvent'" Here is some information that may prove useful: "public delegate void PacketArrivalEvent(object sender, SharpPcap.PcapCaptureEventArgs e) Member of SharpPcap.Pcap" Also, I am referring to the outdate sample code located on the main site for the class wrapper. How can I avoid this error? Any assistance is appreciated. Thanks, Matt

[Gideon Engelberth]

Look closely at how the two are declared:

void device_PcapOnPacketArrival(object sender, SharpPcap.Packets.Packet packet)
delegate void PacketArrivalEvent(object sender, SharpPcap.PcapCaptureEventArgs e)

See the difference?

[Lost User]

Gideon is right. Your method signature does not match the delegate signature. If you are using Visual Studio, it automatically creates the method stub with the correct signature for you.

[bbranded]

Thanks soo much guys. I sincerely appreciate the explanation. Event handlers? Check.