Treeview控件在重复点击节点时也触发SelectedNodeChanged

添加TreeView的Load事件   
    protected void UnitTree_Load(object sender, EventArgs e)
    {
        if (!object.Equals(null, UnitTree.SelectedNode))
        {
            UnitTree.SelectedNode.Select();
            UnitTree.SelectedNode.Selected = false;
        }
    }

 

     protected void TView1_SelectedNodeChanged(object sender, EventArgs e)
        {
            this.TView1.SelectedNode.ToggleExpandState();   //节点子集的展开闭合操作
            this.TView1.SelectedNode.Selected = false;
        }