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How to modify a value inside a 1 dimension listBox

Hello EE,

Lets say I have a Listbox that has been filled with a 1 dimensional array such as

1, 0
100,1
455,2
900,3
etc

how do I modify a single value inside it?

in other words see my code... I know its not good but lets say oldValue = 455 want to modify it so it will be replace by -1

any ideas?

For x As Integer = 0 To ListBox4.Items.Count - 1
                Dim myMatch As New MatchData
                myMatch = ListBox4.Items(x)
                If myMatch.Value = oldValue Then
                    ListBox4.Items(x)(0) = "Done"
                End If
            Next

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Philippe Renaud

ASKER

sorry its not "done" in the code but -1

SOLUTION

Nasir Razzaq

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Philippe Renaud

ASKER

I understand what your line does, but, the problem is that if I have multiple same values.. it would find 2 rows

does it have like a FindStringExactAt lol? for index or something?

do you know what I mean

Nasir Razzaq

Your loop will do the same as well!

Philippe Renaud

ASKER

lol right. sorry ;)

Philippe Renaud

ASKER

mmm.. is it possible that it replace all the item at my index by new value ? Like if it was becoming a non dimensional line ?

becasue I am having an error saying unable to cast int32 type to [.....] MatchData

MatchData is a combinaison of 2 values (value and index)

i woudl like to keep the index but just modify the value.. not sure if Im doing this correctly with your last comment

or am i wrong ?

Nasir Razzaq

My approach would not work with items of a custom type. Looping would work though.

ASKER CERTIFIED SOLUTION

Mike Tomlinson

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Philippe Renaud

ASKER

thanks

Philippe Renaud

ASKER

hey guys :)

if you didnt see it, I have another question here :

https://www.experts-exchange.com/questions/26968746/Linq-Where-clause.html