private void PrivateSalaryTreeView_Load(object sender, EventArgs e)
        {
            nodes = SalaryNode.GetAll().FindAll(a => a.已撤销 == false);

            treeList1.DataSource = nodes;
            treeList1.ExpandAll();
        }
 private void SalaryTreeForm_Load(object sender, EventArgs e)
 {
     nodes = SalaryNode.GetAll();
     treeList1.DataSource = nodes;
     treeList1.ExpandAll();
 }