How can I restart my index selection once index has reached the end

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1.00/5 (1 vote)

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I am trying to loop back to the beginning of my listview items once I have reached the end. Instead, I keep getting a "System.ArgumentOutOfRangeException: 'InvalidArgument=Value of '21' is not valid for 'index'." error.

here is my code:

Dim previousSelectedIndex As Integer = Me.SelectedItems(0).Index

               If Me.SelectedIndices(0) < 21 Then
                   Me.Items(previousSelectedIndex + 1).Selected = True
               Else

                   Me.Items(previousSelectedIndex).Selected = False
                   Me.Items(0).Selected = True
               End If

What I have tried:

I have tried to flip the statement. I also tried to use an elseif, however, that didn't work either.

Posted 14-May-18 11:22am

Member 11856456

Updated 14-May-18 20:15pm

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2 solutions

Solution 1

Why is your value hard coded? If this is a loop, you can check if the value has reached the end of your sequence and reset it to zero. Why do you want to loop endlessly?

Posted 14-May-18 13:19pm

Christian Graus

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Member 11856456 14-May-18 19:51pm

Christian, This portion of code will be in a keypress event that is initiated by pressing enter. As of right now, it will go through the items but gets the error mentioned up top once it reaches past the max index number.

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Member 11856456 · Accepted Answer · 2018-05-14T15:13:00

Fixed my problem. now my selection process starts at the top and when it reaches the end I can press enter and it will bring me back to the top.

Here is the code:

Dim previousSelectedIndex As Integer = Me.SelectedItems(0).Index

               If Me.Items.Item(previousSelectedIndex).Index = Me.Items.Count - 1 Then
                   Me.Items(0).Selected = True
               Else
                   Me.Items(previousSelectedIndex + 1).Selected = True
               End If