Can't see arrow expander

I have a winfom in net8.0 with a treeviewadv control.

ExpanderType is "arrow" but it still show plus expander.

I can't find why.


Syncfusion 33.2.4

Thx


1 Reply

SR Senthilkumar Ranganathan Syncfusion Team May 6, 2026 11:19 AM UTC

Hi VIEIRA Cédric,

The ExpanderType set to "Arrow" is applicable only when TreeViewAdv is using the Office2016 or Metro styles. For the default and other styles, only the Plus/Minus (Classic) expander is displayed.

In the Office2016 and Metro styles, an arrow is shown instead of the plus/minus sign. You can customize the expander type based on your requirements.

Code snippets for setting styles and expander type:
 
this.treeViewAdv1.Style = TreeStyle.Office2016Colorful;
this.treeViewAdv1.ExpanderType = ExpanderType.Arrow;
UG Link: Expander in TreeNode

Regards,
Senthilkumar Ranganathan.

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