I want to create an extensible empty treenode in C #, i.e. treenode that is empty and has a [+] sign next to it. The reason is that it is initially empty, but after clicking node I want to fill it with a lot of child nodes.
The only problem I encountered is that empty treenodes are not extensible, so I don’t know what to do. Is there a way to solve this problem or are there any workarounds?
You need to redraw the tree or create an empty node and just delete it when the parent node expands.
b). , , TreeView, . node , "...", .:)
node .
Check out Josh Smiths' excellent tree structure tutorial . This allows lazy loading of nodes of the child tree using a dummy node, which is removed during the extension.