Question

I have a form which has a ListView and buttons to add/edit/delete items from this list. It has a save & a cancel button. On pressing the cancel button, I want to revert all the changes that have been done in the current form. So, while loading the form I keep a copy of the original list like below.

backupMyListView = MyListView

In the cancel button code, I do the opposite.

MyListView = refMyListView

Whats happening is that, the original listview is never restored because everytime MyListView was updated, backupMyListView also was getting updated.

How do I restore the original ListView on pressing the cancel button?

Answer 1

Both lists are obviously referencing the same list.

You basically need to clone or copy the objects:

Dim backupMyListView As New ListView
For Each lv As ListViewItem In MyListView.Items
  backupMyListView.Items.Add(lv.Clone)
Next