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Breaking Change T1063750
Visible to All Users

TabPanelModel - Tabs are readonly

What Changed

In v22.1, the TabPanelModel.Tabs property changes its type from List<TabModel> to IReadOnlyList<TabModel>. The TabPanelModel.Add() method is removed from the API.

Reasons for Change

In previous versions, elements of the TabPanelModel.Tabs collection could be changed. However, this resulted in the tab panel control's malfunctions.

Impact on Existing Apps

Your applications are affected if you add or remove elements from the TabPanelModel.Tabs collection.

How to Revert to Previous Behavior

  • Enable the TabModel.Visible property instead of calling the TabPanelModel.Tabs.Add(someTab) or TabPanelModel.Add() method.
  • Disable the TabModel.Visible property instead of calling the TabPanelModel.Tabs.Remove() method.
C#
dxReportViewer.TabPanelModel[TabContentKind.ExportOptions].Visible = false;

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