ListView How to tick a checkbox on select item

[Marta Pia]

Hello,

I have a ListView control with CheckBox = true. What I'd like to do
is tick all the check boxes when the items are selected. I've tried
to put this on the ListView_SelectIndexChanged event, as below:

private void lstResultDetail_SelectedIndexChanged(object sender,
System.EventArgs e)
{
ListView.SelectedListViewItemCollection selItems =
this.lstResultDetail.SelectedItems;

foreach ( ListViewItem item in selItems )
{
item.Checked = true;
}

This works just fine when one item is selected, but as you can guess,
when multiple items are selected, it runs through the all the selected
items for each item selected and ends us leaving some unchecked. Is
there an easy solution to my dilemma?

Thanks,
Marta