How to: Create a Directory Listing

How to: Create a Directory Listing

The following code example shows how to use the I/O classes to create a listing of all files with the extension ".exe" in a directory.


Imports System
Imports System.IO

Public Class DirectoryLister
    Public Shared Sub Main(args() As String)
        Dim path As String = Environment.CurrentDirectory
        If args.Length > 0 Then
            If Directory.Exists(args(0)) Then
                path = args(0)
            Else
                Console.WriteLine("{0} not found; using current directory:",
                    args(0))
            End If
        End If
        Dim dir As New DirectoryInfo(path)
        For Each f As FileInfo In dir.GetFiles("*.exe")
            Dim name As String = f.Name
            Dim size As Long = f.Length
            Dim creationTime As DateTime = f.CreationTime
            Console.WriteLine("{0,-12:N0} {1,-20:g} {2}", size,
                creationTime, name)
        Next f
    End Sub
End Class


In this example, the DirectoryInfo is the current directory, denoted by ("."), and the code lists all files in the current directory having a .exe extension, along with their file size, creation time, and name. Assuming that there were .exe files in the \Bin subdirectory of C:\MyDir, the output of this code might look like this:

953          7/20/2000 10:42 AM   C:\MyDir\Bin\paramatt.exe
664          7/27/2000 3:11 PM    C:\MyDir\Bin\tst.exe
403          8/8/2000 10:25 AM    C:\MyDir\Bin\dirlist.exe

If you want a list of files in another directory, such as your C:\ root directory, pass the argument "C:\" into the executable generated by compiling this code, for example: "testApplication.exe C:\".

NoteNote

Visual Basic users may choose to use the methods and properties provided by the FileSystem class for file I/O.

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