How to select all the child nodes without selecting the parent node of a treeview in 1803 version

budding_developer 156

I am using a treeview control in my uwp project which supports 1803 version. I will add the nodes to selected nodes programmatically when it is clicked. Consider a parent node with a single child node. When the child node is clicked, I will add it to the selected nodes programmatically but the parent node also added to selected nodes automatically. I don't want the parent node to be added to the selected nodes. Is there any way we can restrict it? It would be much helpful if the solution is provided in C#. Thanks in advance.

Fay Wang - MSFT 5,191 Reputation points

2020-04-09T02:09:13.333+00:00

From this document, it mentions if all the child nodes are selected, the parent node also becomes selected. It is by design. If you want the selected nodes only contains the child nodes, you could try to traverse the SelectedNodes, when the node is equal to parent node, then remove it.
budding_developer 156 Reputation points

2020-04-09T08:10:56.623+00:00

Hi, I tried what you told but removing parent node from SelectedNodes removes its child node too.
Fay Wang - MSFT 5,191 Reputation points

2020-04-09T09:36:20.377+00:00

Yes, it is an expected behavior, when the parent node is removed from SelectedNodes, this means unselect all child nodes, so its child nodes will also be removed from SelectedNodes, it is by design. I may not have made it clear before, what I mean is you can create a new List<TreeViewNode> and then traverse the SelectedNodes, when the node is equal to child node, you can add the node into the new list. After that, you can use the new list to do what you want.
budding_developer 156 Reputation points

2020-04-10T07:10:26.52+00:00

Hi, thanks alot. My issue has been resolved.
Fay Wang - MSFT 5,191 Reputation points

2020-04-10T08:12:15.353+00:00

Glad you have solved your issue, you can post an answer to share your solution to help other people.