How to clear all Groups And Items in Listview Control

Question

如何在Listview控件中清除所有组和该组中的所有项目

Answer 1

Probably ListView.Clear() will work for you. And to clear groups in ListView call ListViewGroupCollection.Clear()

Answer 2

if you are filling your group items with datasource then you could try something like this..

How about

 DataSource = null;
 DataBind();

Answer 3

If you want to remove only the listViewItems which are grouped, you can do following:

        foreach (var group in listView.Groups)
        {
            var listViewItemsToDelete = listView.Items.Cast<ListViewItem>().Where(item => Equals(item.Group, group));
            foreach (var itemToRemove in listViewItemsToDelete)
            {
                listView.Items.Remove(itemToRemove);
            }
        }
        listView.Groups.Clear();