How can I write a VB.NET program that asynchronously lists all accessible files on all drives of a computer and writes this list to a text file?

Bernard Aybout (Virii8)

2 years ago

Here is a VB.NET program designed to list all accessible files on all drives and write this list to a file at “c:\filelist.txt“. The code also uses a `BackgroundWorker` to perform the operation asynchronously

Imports System.ComponentModel
Imports System.IO
Imports System.Threading
Imports Microsoft.VisualBasic.Devices

Public Class Form1

    Public path As String = "c:\"
    Public fileList As New List(Of String)

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        BackgroundWorker1.RunWorkerAsync()
    End Sub

    Private Sub BackgroundWorker1_RunWorkerCompleted(sender As Object, e As RunWorkerCompletedEventArgs) 
                                                          _Handles BackgroundWorker1.RunWorkerCompleted
        Me.BackColor = Color.Green
    End Sub

    Sub GetAllAccessibleFiles(path As String, filelist As List(Of String))
        For Each file As String In Directory.GetFiles(path, "*.*")
            Application.DoEvents()
            filelist.Add(file)
        Next

        For Each dir As String In Directory.GetDirectories(path)
            Application.DoEvents()
            Try
                GetAllAccessibleFiles(dir, filelist)
            Catch ex As Exception
                ' Handle exceptions here if necessary
            End Try
        Next
    End Sub

    Private Sub BackgroundWorker1_DoWork(sender As Object, e As DoWorkEventArgs) 
                                                         _Handles BackgroundWorker1.DoWork
        Application.DoEvents()

        For Each drive In DriveInfo.GetDrives
            Application.DoEvents()
            GetAllAccessibleFiles(drive.ToString, fileList)
        Next

        Application.DoEvents()

        Using sw As New StreamWriter("c:\filelist.txt")
            For Each s As String In fileList
                Application.DoEvents()
                sw.WriteLine(s)
            Next

            ' Flushing and closing StreamWriter
            sw.Flush()
            sw.Close()
        End Using
    End Sub

End Class

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How can I write a VB.NET program that asynchronously lists all accessible files on all drives of a computer and writes this list to a text file?

Here is a VB.NET program designed to list all accessible files on all drives and write this list to a file at “c:\filelist.txt“. The code also uses a `BackgroundWorker` to perform the operation asynchronously

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