Question

When opening the port I add the handler and it works.
What I need is, at some point, to change the handler to another subroutine..
What I did was:

AddHandler serport.DataReceived, AddressOf handler1

And the first handler worked as expected…
after some time in code I do:

RemoveHandler serport.DataReceived, AddressOf handler1  
AddHandler serport.DataReceived, AddressOf handler2  

But the second handler doesn’t work. it never gets called.
What can I do?

I also have coded this routine to open a port :

Public Function OpenSerial(ByRef serialport As String, ByVal receivehandler As SerialDataReceivedEventHandler) As SerialPort
    Dim ser As SerialPort
    ser = New System.IO.Ports.SerialPort(serialport, 115200, Parity.None, 8, StopBits.One)
    With ser
        .Handshake = Handshake.None
        .ReadBufferSize = 10000
        .ReadTimeout = 500
        .WriteBufferSize = 10000
        .WriteTimeout = 500
        .RtsEnable = True
        .DtrEnable = True
        AddHandler .DataReceived, receivehandler
        AddHandler .ErrorReceived, AddressOf sErrorHandler
        .Encoding = System.Text.Encoding.Default
        .Open()
        .DiscardOutBuffer()
    End With
    OpenSerial = ser
End Function

So I thought I could use it in this way:

Dim comSerial As SerialPort
comSerial = OpenSerial("COM1", AddressOf Handler1)

Anyhow, however I do it I get the same result: the first time, the first handler works, when redefined, even if the port is closed and reopened, the second handler never gets
called 🙁

Answer 1

This question was bogus.

The program works fine. I was not receiving any data for another reason.