A good way to use the Treeview control in Asp.net to achieve unlimited Classification

Recently, I wrote an infinitely hierarchical table using the Treeview control. ProgramI checked a lot of information on the Internet, most of which were recursive call methods. I thought it was very complicated. Later, I accidentally looked at msdn and referred to it. I thought it was the best solution. When I said it, you would suddenly become open-minded. In the reeview event, a treenodepopulate event is triggered when the treenode is being filled. Write the event Method to read the corresponding sub-node content from the database. Note that you must set the populateondemand attribute of the node to true when filling the node dynamically:
Treenode Tn = new treenode ();
Tn. Text = Dr ["orgname"]. tostring ();
Tn. populateondemand = true;
Treeview1.nodes. Add (TN );
In this way, the added node will trigger the treenodepopulate event.
As for the details, it is not the scope of this indicator. I will not elaborate on the specific msdn examples.