private void ListView_dir_MouseDoubleClick(object sender, MouseButtonEventArgs e)
        {
            ListView lv = sender as ListView;

            if (lv == null)
            {
                return;
            }

            if (lv.SelectedIndex < 0)
            {
                return;
            }

            MyListItem item = lv.Items[lv.SelectedIndex] as MyListItem;

            if (item == null)
            {
                return;
            }

            if (item.Type == "dir")
            {
                ;
            }
            //textBox_name.Text = item.Name;
        }
        private void ListView_dir_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            ListView lv = sender as ListView;

            if (lv == null)
            {
                return;
            }

            if (lv.SelectedIndex < 0)
            {
                return;
            }

            MyListItem item = lv.Items[lv.SelectedIndex] as MyListItem;

            if (item == null)
            {
                return;
            }

            if (item.Type == "dir")
            {
                return;
            }
            textBox_name.Text = item.Name;
        }