Deactivate the PlusMinus in a Subnode of the Treeview

[Ralf Huettl]

Hi all,

we are using your TreeView and want to have PlusMinus icons to opened/closed parent nodes. If nodes are empty (no child node) then there should be no plus (and no minus) - if there are children there must be the plus.

Now we set in the cildnodes if they have no more childs node.NodeData.ShowPlusMinus=false

This setting does nothing dor this node. The Plus appears here too ?

How can we prevent the plus in any node that has no more childnodes?

Thank you very much
Ralf

[Arun Srinivasan]

Hi Ralf,

1. Which version of Essential Tools are you using?

2. Can you post a sample or code snippet? You should call
ShowPlusMinus = false;
after Nodes.Add()

You need to create/add the nodes before setting it's properties.

Regards,
Arun

[Patrick]

I am having a similar problem. I am looking at the TreeViewAdv LoadOnDemand sample project. At the leave node, there is a plus sign. How do I prevent the leave node displaying the plus sign?

[Administrator]

Hi Patrick Which version of Essential Tools are you using? Can you send an email to [email protected] to obtain the latest beta version as there have been a lot of changes made to the TreeViewAdv control in the 2.0 version. Regards Arun

[Patrick]

I am using 2.0.2.0 beta version of the tree view.

[Administrator]

Hi Patrick

The behaviour you encounter in the LoadOnDemand is by design as when the LoadOnDemand property is set to True. All the nodes will have the plus-minus set to visible.

You should handle the BeforeExpand event of the nodes and add subnodes to the respective nodes. The tree will then show or hide the plus-minus based on whether or not children were added. You can see this behavviour in the sample.

Regards
Arun

[Administrator]

Arun,

I understand the design of the loadondemand, but is there any way to not show the plus sign if there isn''t any child for a given node? Can the tree query for each immediate sub node(s) after/before expand, to find out if a plus sign is required? Can this be added to the tree? If not, is there a workaround for not showing the plus sign for nodes without any child?

[Administrator]

I answered my own question.

Thanks.