Invoke Event Call Backs

[VBJames]

Hi,

I am trying to work out why my program is erroring on load.

It is because of Phidget22.Phidget.InvokeCallbacks = True on debug its coming up as False and then throws a error.

Is there anyway i can turn this on.......



i am trying to develop a RFID Clocking in system with a SQL DB backend and the RFID companies code works correctly with the same code lines were mine does not.

Thanks in advance,

James

[dday9]

Instead of taking a screenshot of the code, could you copy/paste the code inside of [CODE][/CODE] tags?

[VBJames]

Instead of taking a screenshot of the code, could you copy/paste the code inside of [CODE][/CODE] tags?

When I get back into the office will post the code what areas do you require?

[dday9]

Presumably the part you have screenshotted.

[jmcilhinney]

what areas do you require?

The parts that you think are relevant to the problem.

[passel]

I don't usually need to add code to the New method, but I think if I did, I would add it after the comment where it says "Add any Initialization...".

Adding code before the components are initialized seems like you're asking for problems.
I could be wrong though, since I haven't added code to the method (that I can remember.... I'm old).

[VBJames]

Here is the code

Imports System.Runtime.InteropServices
Imports System.Data.SqlClient
Imports System.Data
Imports Phidget22
Imports Phidget22.Events

Public Class Form1
    Dim WithEvents device As Phidget22.RFID
    Dim open As ExampleUtils.ExampleUtils.CommandLineOpen
    Dim errorBox As ErrorEventBox
    Dim runonce As Boolean = False

    Public Sub New()
        open = New ExampleUtils.ExampleUtils.CommandLineOpen(Me)
        ' This call is required by the Windows Form Designer.
        Phidget22.Phidget.InvokeEventCallbacks = True
        InitializeComponent()
        ' Add any initialization after the InitializeComponent() Call.
    End Sub
    Public Sub New(ByVal commandLine As String())
        open = New ExampleUtils.ExampleUtils.CommandLineOpen(Me)
        open.commandLine = commandLine
        Phidget22.Phidget.InvokeEventCallbacks = True
        InitializeComponent()
    End Sub

When i debug the

Phidget22.Phidget.InvokeEventCallbacks = True

is showing as False.

Cheers James

[jmcilhinney]

So as suggested in post #6, the auto-generated comment explicitly states that you should put your initialisation code after the call to InitializeComponent and yet you have ignored that and put it first. Why would you think that that was a good idea? Fix that obvious issue and then get back to us if there's still an issue.

Also, your constructors are wrong. You should put everything you can into the parameterless constructor and then, unless it's impossible for some reason, call the parameterless constructor in the other one:

Public Sub New()
    InitializeComponent()
    
    'Your code goes here, as is clear simply by reading what's in front of you.
End Sub
 
Public Sub New(ByVal commandLine As String())
    Me.New()
 
    open.commandLine = commandLine
End Sub

[VBJames]

I have done as jmcilhinney advises but the same issue

Phidget22.Phidget.InvokeEventCallbacks = True is still false on debug and crashes.

Cheers James

[jmcilhinney]

Show us the actual code you have now and indicate exactly where the exception is thrown. You have no idea the number of times that people have indicated that they have done as instructed but it still didn't work, only for us to find out later than they didn't do as instructed at all. If you want help with something that doesn't work, ALWAYS show us what that is. If you make changes, show us the new code. NEVER make us assume or guess because if we assume or guess incorrectly then it's a waste of our time and yours.

[VBJames]

Thanks for all the help I have worked it and my app is running correctly and can now start developing it.

Cheers James