private void RefreshCardLevel()
{
DataTable dt = SelectDao.GetCardName();
this.treeList1.BeginUnboundLoad();
TreeListNode parentNode = this.treeList1.AppendNode(new object[] { "所有会员" }, -1);
foreach (DataRow dr in dt.Rows)
{
string level = dr[0].ToString();
cardNameList.Add(level);
this.treeList1.AppendNode(new object[] { level }, parentNode);
}
this.treeList1.EndUnboundLoad();
}