private void btnVerwijder_Click(object sender, EventArgs e)
 {
     foreach (ListViewItem item in lstItems.CheckedItems)
     {
         int index = item.Index;
         itemDAO.DeleteItem(Items[index]);
         lstItems.Items.Remove(item);
     }
     this.Items = itemDAO.GetAll();
 }
        private void btnVerwijder_Click(object sender, EventArgs e)
        {
            Item item = GeslecteerdeItems[lstItems.SelectedIndex];

            itemDAO.DeleteItem(item);

            lstItems.Items.Clear();

            if (btnDiner.BackColor == System.Drawing.Color.DimGray)
            {
                ToonLijstDiner();
            }
            else if (btnDrank.BackColor == System.Drawing.Color.DimGray)
            {
                ToonLijstDrank();
            }
            else if (btnLunch.BackColor == System.Drawing.Color.DimGray)
            {
                ToonLijstLunch();
            }
        }