autocalculate total value of items in listview when removing item using c#

Question

I\'m using a listview as a shopping cart. I need to know how to recalculate the total value of the cart when I remove an item.

Here is my code for adding to listview;

Answer 1

You can't change the same list in foreach.

foreach (ListViewItem item in lvCart.Items)
{
    if (lvCart.Items[0].Selected)
    {
        lvCart.Items.Remove(lvCart.SelectedItems[0]);
        total += Convert.ToInt32(item.SubItems[1].Text);
    }
}

The solution is create duplicate list and change it:

var newList = lvCart;

foreach (ListViewItem item in lvCart.Items)
{
    if (lvCart.Items[0].Selected)
    {
        newList.Items.Remove(lvCart.SelectedItems[0]);
        total += Convert.ToInt32(item.SubItems[1].Text);
    }
}