Make Sure The COM1 Exists Before I Try To Open It?
Oct 20, 2010
In the developing environment the computers do not have com ports, but I am working on a project for a client who does. It is annoying that when I test the program on my computers I always get the error. "The port (COM1) does not exist"
I am catching the general exeption but the debugger stops there anyway. I can press "continue" and the program resumes but I would like to clean that up and not try to open the port if the computer does not have one.
vb.net
Try
SerialPort1.Open()
[Code].....
lblNoCOM1 just tells the user that there is no serial port and that the barcode scanner is not working.
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vb.net
Dim xlApp As excel.Application
Dim xlWorkBook As excel.Workbook
Dim xlWorkSheet As excel.Worksheet
[Code].....
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[Code]...
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NET USE command.
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[Code]...
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If Serial.IsOpen = True Then
[Code]....
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Public Class Form1
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[code].....
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Here's what I have written:
Sub SendSerialData(ByVal data As String)
data = "n65"
' Send strings to a serial port.
[code]....
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Private Sub Button1_Click () Handles Button1.Click
MSComm1.CommPort = 1 'Use the COM1 serial port
MSComm1.Settings = "4800, N, 8.1"[code].....
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[Code]....
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[code].....
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Dim Lng As Long
Dim lpPoint As POINTAPI
Dim X, Y As Long
[code].....
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