Unchecking CheckedListBox checkboxes in vb.net code

Question

This shouldn't be too difficult. I'm trying to find a method that will allow me to uncheck (a Collection) of Checkboxes in a ListView control in Vb.Net code.

 

I tried the method .Items.Clear but it removes the checkboxes completely from the WinForm. The .ClearSelected only removes what you've highlighted (or the item you've highlighted) from the GUI, not the checkbox. I've tried .SelectedItems, .CheckedItems, etc and I just can't find what I'm looking for. Any help would be welcomed!

 

Thank you,

Wallace

Answer 1

    For Each item As ListViewItem In ListView1.Items
      item.Checked = False
    Next

Answer 2

This just removes the highlighting from the last item checked in the CheckedListBox but it doesn't remove the check mark.

Does it sound like another Sub need to be written within the Sub as a Click.Event and how would one write a sub under another sub? I've never done it.

 

Thank you,

Wallace

Answer 3

Here is an example from the help files-

 

            Dim myEnumerator As IEnumerator
            myEnumerator = checkedListBox1.CheckedIndices.GetEnumerator()
            Dim y As Integer
            While myEnumerator.MoveNext() <> False
                y = CInt(myEnumerator.Current)
                checkedListBox1.SetItemChecked(y, False)
            End While

 

 

Answer 4

Hi nbk5533

 

Use ListViewItem.Checked property. Hope may helps.

 

Regards

Wei Zhou

Answer 5

Thank you to everyone for your input. To cwillsh, nice job. This is just the solution I needed and it worked perfectly.

 

Wallace

Answer 6

I needed to do this same thing and was able to use this code. It works but I don't understand why. Can someone explain it please? I tried code suggested elsewhere in these forums for doing this. ie:

for each item in checkedlistbox1.checkeditems
          checkedlistbox1.setitemcheckstate(checkedlistbox1.items.indexof(item), checkstate.unchecked)
next

This looks like it should work but I get the following error when I try to implement it:

"List that this enumerator is bound to has been modified. An enumerator can only be used if the list does not change."

My checkboxes are designed to have only 2 selections. I assume that this error means that once I change the checkstate of the first of the two items, my next statement cannot be used. Any thoughts on a simple fix to this?

Thanks.

Answer 7

Thanks cwillsh, this works perfectly.