B4J Question COM port issue

[frodotorbins83]

My PC does not have COM Port (But have USB). Because there is no COM port - list is empty (imange in attachment). How the sutuation with no COM port can be handled? I mean "if there is no port - how to block the "open" button or raise an exeption which blocks.

Example:
Sub AppStart (Form1 As Form, Args() As String)
serial.Initialize("")
ComboBox1.Items.AddAll(serial.ListPorts)
log(serial.ListPorts)
End Sub

In Logs window : ArrayList []

How can I block "open" button and understand the serial.listports is empty?

 

[Daestrum]

Possibly,

If ComboBox1.Items.Size = 0 then YourButton.Enabled = False

 

[frodotorbins83]

Possibly,

If ComboBox1.Items.Size = 0 then YourButton.Enabled = False

Dear Daestrum,

Thank You!

 

[Erel]

Another option:

YourButton.Enabled = ComboBox1.Items.Size > 0

This works both ways (relevant if the code can be called multiple times).