how to select all listview items?

Question

how to select all listview items ?

Answer 1

There is already an accepted answer for this but I use something similar to this:

lv.BeginUpdate();
List<ListViewItem> items = (from i in lv.Items).ToList;
items.ForEach(i => i.Selected == true);
lv.EndUpdate();

It seems to run much faster if there's several thousand items. Also, since we're using BeginUpdate() and EndUpdate(), the ListView control doesn't update after selecting each item.

Answer 2

Just pass your listview and checkstate to the function.

public void CheckAllItems(ListView lvw, bool check)
{
    lvw.Items.OfType<ListViewItem>().ToList().ForEach(item => item.Checked = check);
}