Version: 2021.3
LanguageEnglish
  • C#

TreeView.SetExpanded

Leave feedback
Suggest a change

Success!

Thank you for helping us improve the quality of Unity Documentation. Although we cannot accept all submissions, we do read each suggested change from our users and will make updates where applicable.

Close

Submission failed

For some reason your suggested change could not be submitted. Please <a>try again</a> in a few minutes. And thank you for taking the time to help us improve the quality of Unity Documentation.

Close

Cancel

Declaration

public bool SetExpanded(int id, bool expanded);

Parameters

Parameter Description
id TreeViewItem ID.
expanded True expands item. False collapses item.

Returns

bool True if item changed expanded state, false if item already had the expanded state.

Description

Set a single TreeViewItem to be expanded or collapsed.

Declaration

public void SetExpanded(IList<int> ids);

Parameters

Parameter Description
ids List of item IDs that should be expanded.

Description

Set the current expanded TreeViewItems of the TreeView. This will overwrite the previous expanded state.

Is something described here not working as you expect it to? It might be a Known Issue. Please check with the Issue Tracker at issuetracker.unity3d.com.

Copyright ©2025 Unity Technologies. Publication Date: 2025-10-07.
Tutorials Community Answers Knowledge Base Forums Asset Store Terms of use Legal Privacy Policy Cookies Do Not Sell or Share My Personal Information