大数据ListView

因项目需求，要实现个类似股票的键盘精灵采用LISTVIEW显示，采用LIST<T>查找方式和虚表的操作方式

 private List<ptobj> ptlist=null;

 ptlist = null;

//查找的关键
            ptlist = KeyPtsMap.getAllPts().FindAll(delegate(ptobj ptkey) { return ptkey.py.IndexOf(key) == 0; });

            //  listView1.Items.Clear();
            int iPtlistCount = ptlist.Count;
            m_hListViewItems = new List<ListViewItem>();

            for (int i = 0; i < iPtlistCount; i++)
            {

                ListViewItem Item = new ListViewItem(new string[] { ptlist[i].chartname.ToString() + "-" + ptlist[i].py.ToUpper() });
                // Item.Tag = ptlist[i].py.ToUpper()+"-"+ptlist[i].chartname.ToString()+"-"+ptlist[i].ptsn.ToString();
                m_hListViewItems.Add(Item);
            }

//虚表的操作方式
            listView1.RetrieveVirtualItem += new RetrieveVirtualItemEventHandler(listView_RetrieveVirtualItem);

            listView1.VirtualListSize = iPtlistCount;
            listView1.VirtualMode = true;

            this.listView1.Refresh();

            this.listView1.Focus();