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VB.Net program to demonstrate the IOException

Here, we are going to demonstrate the IOException in VB.Net.
Submitted by Nidhi, on January 07, 2021 [Last updated : March 08, 2023]

IOException in VB.Net

Here, we will demonstrate the IOException, here we open a serial port that does not exist in the computer system then IOException gets generated.

Program/Source Code:

The source code to demonstrate the input/output exception (IOException) is given below. The given program is compiled and executed successfully.

VB.Net code to demonstrate the example of IOException

'Vb.Net program to demonstrate the IOException.

Imports System.IO
Imports System.IO.Ports

Module Module1
    Sub Main()
        Try
            Dim data As String
            Dim serial As New SerialPort("COM1", 4800, Parity.Odd, 8, StopBits.One)
            serial.Open()
            data = serial.ReadLine()
            serial.Close()
            Console.WriteLine(data)

        Catch ex As IOException
            Console.WriteLine("Exception: " & ex.Message)
        End Try
    End Sub
End Module

Output

Exception: The port 'COM1' does not exist.
Press any key to continue . . .

Explanation

In the above program, we created a module Module1 that contains a function Main().

The Main() function is the entry point for the program. Here, we created the object of SerialPort class and then read data from the serial port, but in our case, the "COM1" port does not exist in the computer. Then IOException gets generated that will be caught in the catch block and print the appropriate message on the console screen.

VB.Net Exception Handling Programs »

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