bootstrap treeview 必须一次全加载吗?

Question

bootstrap treeview 必须一次全加载吗

Answer 1

treeview1.selected.Expand(True);//子节点展开
treeview1.selected.collapse(True)://子节点闭拢
树节点全部展开：
procedureTForm1.Button1Click(Sender:TObject);
varnode:TTreeNode;begin
iftreeview1.Items[0]<nilthenbegin
node:=treeview1.Items[0];
node.Expand(true);
whilenode.getNextSibling<nildobegin
node:=node.getNextSibling;
node.Expand(true);end;end;end;
树节点全部收缩：