List<string> data = new List<string>();
        private void Window_Loaded(object sender, RoutedEventArgs e)  //程序加载后，给listView添加内容
        {

            for(int i=0;i<60000;i++)
            {
                this.data.Add(new string{i+"aaaaaaaaaaaaaaaaaaaaaaabbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbcv" });
            }
            listView.DataContext = data;
        }

        private void button_click(object sender, EventArgs args)   //一个按钮的click事件的触发操作。
        {
            this.data.Clear();
            this.listView.Items.Refresh();
        }