Solved

Listbox sorting numerically

Posted on 2004-08-17
6
307 Views
Last Modified: 2008-03-06
I am loading files from a directory into a Listbox using this:

Dim en As IEnumerator = OD1.FileNames.GetEnumerator
While en.MoveNext
    ListBox1.Items.Add(Dir(en.Current))
End While

The file are named as such;  1x-111xx-1-1yy-5.toc.htm
I am needing to sort the files using the number after the yy-.  As 1,2,3,...9,10,11;  Right now sort is sorting alphabetically.

Any help on this wiuld be great, thanks.
0
Comment
Question by:JHalstead
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
6 Comments
 
LVL 25

Expert Comment

by:RonaldBiemans
ID: 11821891
you could try something like this. (it's not brilliant code (redim) but it works and should give you a general idea)

dim str() as string
dim int() as integer
dim x as integer = 0
Dim en As IEnumerator = OD1.FileNames.GetEnumerator
While en.MoveNext
  redim str(str.getupperbound(0) + 1)
  redim int(int.getupperbound(0) + 1)
  str(x) =  dir(en.current))
  int(x) = Val(str(x).Substring(str(x).IndexOf("yy-") + 3, str(x).IndexOf(".") - (str(x).IndexOf("yy-") + 3)))
  x += 1
End While

str.Sort(int, str)

For Each g As String In str
     ListBox1.Items.Add(g)
Next
0
 

Author Comment

by:JHalstead
ID: 11822041
Object reference not set to an instance of an object.  Occured on the first ReDim statemt.  str=nothing
0
 
LVL 25

Expert Comment

by:RonaldBiemans
ID: 11822080
oeps, sorry

dim str(0) as string
dim int(0) as integer
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 

Author Comment

by:JHalstead
ID: 11822202
Hi, I'm sorry to waist your time, but I got the answer from another post.  ICompare!!

Dim ar As New ArrayList(OD1.FileNames)
        ar.Sort(New MySorter)
        ListBox1.Items.AddRange(ar.ToArray())



    Private Class MySorter
        Implements IComparer


        Public Function Compare(ByVal x As Object, ByVal y As Object) As Integer Implements System.Collections.IComparer.Compare
            Dim s1 As String = x
            Dim s2 As String = y
            Try
                Dim i1 As Integer = s1.IndexOf("."c)
                Dim j1 As Integer = s1.LastIndexOf("-"c, i1)
                Dim n1 As Integer = Integer.Parse(s1.Substring(j1 + 1, i1 - j1 - 1))

                Dim i2 As Integer = s2.IndexOf("."c)
                Dim j2 As Integer = s2.LastIndexOf("-"c, i2)
                Dim n2 As Integer = Integer.Parse(s2.Substring(j2 + 1, i2 - j2 - 1))

                Return n1 - n2
            Catch ex As Exception
                Return String.Compare(s1, s2, True)
            End Try
        End Function
    End Class
0
 
LVL 25

Expert Comment

by:RonaldBiemans
ID: 11822222
No problem, go to community service and get your points refunded
0
 
LVL 2

Accepted Solution

by:
Lunchy earned 0 total points
ID: 11824385
Closed, 125 points refunded.
Lunchy
Friendly Neighbourhood Community Support Admin
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Creating an analog clock UserControl seems fairly straight forward.  It is, after all, essentially just a circle with several lines in it!  Two common approaches for rendering an analog clock typically involve either manually calculating points with…
If you need to start windows update installation remotely or as a scheduled task you will find this very helpful.
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…
Are you ready to implement Active Directory best practices without reading 300+ pages? You're in luck. In this webinar hosted by Skyport Systems, you gain insight into Microsoft's latest comprehensive guide, with tips on the best and easiest way…

740 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question