[RESOLVED] Managing ListView Columns (with Checkboxes)

[JA12]

I started off using a CheckedListBox, but that didn't allow me to control the check boxes as I wished to. I read that a ListView with the CheckBox property set to True would give me more control, so I've recoded for a ListView.

I'm now stuck as the ListView is 100% loaded and controlled programmatically and I can't figure out how to force the Items added to the ListView into a single column, currently the items insist on loading into two columns at the width of the checkbox:


How can I set the width of the column and force the items into one column?

        Dim itm As ListViewItem
        clstFolders.Clear()

        With clstFolders
            .Columns.Clear()
            .Columns.Add("Folder Settings")
            .Columns(0).Width = Me.clstFolders.Width
            ' get the list of folders from app.config
            modGlobals.ReadAppConfig(aFolders)                  ' an array of strings
            ' now load the times in to the CheckListBox
            For i = 1 To modGlobals.gFolders
                itm = New ListViewItem
                itm.Text = aFolders.GetValue(i)
                itm.Checked = True
                .Items.Add(itm)
            Next
        End With
End Sub

I'm not sure I'm tying the Items to the Column either, but I can't see how to do that...

[techgnome]

Change to the Details view... but if you only have the one col, a list view really isn't the best control to use... A listbox would have been better... what difficulties were you having with it?


-tg

[JA12]

I couldn't check if the item (string) is checked or not, nor could I change the Checked value when the control was a CheckedListBox

For Each itm in CheckedListBox1.Items

itm is a String so it seems to be impossible to manipulate the checkbox.

I can do all this in ListView, but I'm having a problem with the Column...

[techgnome]

Right... it is a string... that's why you use the SetItemchecked method:

        For a As Integer = 1 To 10
            Me.CheckedListBox1.Items.Add(a.ToString)
        Next

        For a As Integer = 0 To Me.CheckedListBox1.Items.Count - 1
            Me.CheckedListBox1.SetItemChecked(a, True)
        Next

-tg

[JA12]

Thanks for that, that worked.

Not obvious, but I'm glad it's there!

[techgnome]

Yeah, not completely obvious, but if you think about it, it does make some sense, since the objects in the list could be anything (especially if it's bound to a list or a datatable) so those objects wouldn't have a Checked property... so the CheckedListBox has to handle it... there's also a corresponding GetItemChecked that returns the checked value of the item, as well as a CheckedItems collection property.

-tg

[JA12]

GetItemChecked: Yes I found that, once you told me about the SetItemChecked...