PeerMessage.MsgReceived Event

Data Change Event

Remarks

 If you handling the MsgReceive Event to update a UI, you must implement a delegate.  See the UnsolicitedMessage project for an example.

Example

VB
Try
  ' ******************************
  ' * initialize PeerMessage class
  Dim peerMsg As New PeerMessage() with Events
 ' *****************************
 ' * add event handler
  AddHandler peerMsg.MsgReceived, AddressOf peerMsg_MsgReceived 
  ' ****************************
  ' * listen for messages from PLC
  MyPLC.ReadTag(MyTag)
Catch ex As System.Exception
  Console.WriteLine(ex.Message)
End Try
{...elsewhere in code...}
' *********************************
' * event handler
Private Sub peerMsg_MsgReceived(ByVal sender As Object, ByVal e As System.EventArgs)
  Try
   Dim args as MessageEventArgs
   
   ' * event argument parameters
   args = e
   ' ***************************
   ' * process the event data
   Console.WriteLine(args.SenderIP)
   Console.WriteLine(args.ItemName)


   Console.WriteLine(args.Value.ToString())   


   Console.WriteLine(args.TimeStamp.ToString())


   Console.WriteLine(args.NetType.ToString())
 
 Catch ex As System.Exception
   Console.WriteLine(ex.Message)
 End Try
End Sub



C#
try
{
  ///////////////////////////
  // initialize PeerMessage class
  PeerMessage peerMsg = new PeerMessage();
  ///////////////////////////
  // add event handler
  peerMsg.MsgReceived +=new EventHandler(peerMsg_MsgReceived);
  ///////////////////////////
  // listen for messages from the PLC.
  peerMsg.Listen();
}
catch(System.Excpetion ex)
{
  Console.WriteLine(ex.Message);
}
{...elsewhere in code...}
/////////////////////////////////////
// EVENT HANDLER
private void peerMsg_MsgReceived(object sender, EventArgs e)
{
  try
  {
    //////////////////////////////////////
    // event argument parameters
    MessageEventArgs args = (MessageEventArgs)e;
    /////////////////////////////////////
    // process the event data
    Console.WriteLine(args.SenderIP));
    Console.WriteLine(args.ItemName);
    Console.WriteLine(args.Value.ToString())


    Console.WriteLine(args.TimeStamp.ToString())


    Console.WriteLine(args.NetType.ToString())



  }
  catch (System.Exception ex)
  {
    Console.WriteLine(ex.Message);
  }
}           

See Also

Listen | Shutdown