[RESOLVED] CSV File Manipulation

I have a CSV file I want to manipulate. I am dropping the csv into a list box, then going through line by line. I want to check a column for duplicates, and then:

---ex of the columns in csv file---
Column1-----Column2--------Column3
------------------------------------
004.tif----------9------------Keep
005.tif---------10
006.tif---------13
004.tif---------15------------Bad
007.tif---------17
004.tif---------25------------Bad

1.) if there is a duplicate (004.tif), go to the next column(2) and store the value in a field. Then if I come across another value which is a duplicate(4th line), check the other column and compare the 2 values, keeping the lowest, and flagging the higher one with a value in another column(3) so the result would look something like what you see above. I already have a function to put the csv into a list box:

VB Code:

Private Function CSV2ListBox()
 
        'This function gets all data from the specified csv file,
        'and places it in row by row in a listbox
 
        Dim filetoread As String
        Dim filestream As StreamReader
        Dim readcontents As String
 
        Dim s As String
        Dim a() As String
        Dim j As Integer
 
        filetoread = System.IO.Path.GetFullPath("C:\len\test.csv")
        filestream = File.OpenText(filetoread)
        readcontents = filestream.ReadToEnd()
 
        s = readcontents
 
        lstResult.Items.Clear()
 
        a = s.Split(vbLf)
 
        For j = 0 To a.GetUpperBound(0) - 1
            lstResult.Items.Add(a(j))
        Next
 
    End Function

Any help is greatly appreciated

Since the move from VB.net from Office Development Area, the response time has really gone down...

VB Code:

Public Function PrevOccurrence(EndIndex as Integer) as Boolean
  For I = 0 to EndIndex-1
    If(lstItems.Item(I)=lstItems.Item(EndIndex))
       PrevOccurrence=True
       Exit Function
    End If
    PrevOccurrence=False
  Next I
End Function
 
If(PrevOccurrence(lstItems.ListIndex)) Then
 'Do whatever to indicate it is already in the list
 lstItems.Items(lstItems.ListIndex)=lstItems.Items(lstItems.ListIndex) & " BAD ITEM"
End IF

Thanks Bilbo, I ended up finding out a way similar to that, I will rate you anyway. :D

If anyone wants to know how to do something along these lines, message me.