how to sort the Dates in array list in vb.net?

Question

i have several files named in dated format(dd/mm/yyyy) .i have to collect them and sort in arraylist ? any suggestion ...i did like this

Dim filepath As String = FileStr
Dim directoryPath As String = System.IO.Path.GetDirectoryName(filepath)
Dim arrayList As New System.Collections.ArrayList()
For Each file As String In System.IO.Directory.GetFiles(directoryPath)
 arrayList.Add(System.IO.Path.GetFileNameWithoutExtension(file))
Next
arrayList.Sort()

Answer 1

NOTE: a file named 29/06/2015.txt is not valid on Windows . the following code has been tested using the following formats: yyyy-mm-dd , yyyy-dd-mm ,...

Would the following implentation not work? This uses a List however instead of your arraylist .

Dim filepath As String = FileStr
Dim directoryPath As String = System.IO.Path.GetDirectoryName(filepath)
Dim myFileList As New List(Of String)
For Each file As String In System.IO.Directory.GetFiles(directoryPath)
    'Add only dates to the list
    If (IsDate(System.IO.Path.GetFileNameWithoutExtension(file))) Then
        myFileList.Add(System.IO.Path.GetFileNameWithoutExtension(file))
    End If
Next
myFileList.OrderByDescending(Function(x) CType(x, DateTime))

Use OrderBy Or OrderBydescending to change the direction of sorting

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If the Arraylist is mandatory then you still can change the output you can easily create an ArrayList from a List as follows.

Dim arr As New ArrayList(myFileList)