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      How to: Implement Custom Sorting
      How to: Implement Custom Grouping
      How to: Sort Group Rows by Summary Values
      How to: Obtain the Number of Group Rows Displayed within a View
      How to: Improve Performance when Grouping Data
      How to: Implement Custom Filtering
      How to: Customize Filter Items within a Column's Filter Dropdown
      How to: Prevent Group Rows from being Collapsed
      How to: Prevent Group Rows from being Expanded
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View this topic on docs.devexpress.com (Learn more)

How to: Prevent Group Rows from being Expanded

The following example shows how to customize whether a particular group row can be expanded.In this example, the 'Status: Invalidated' group row is prevented from being expanded, and the full expanding is disabled. To do this, the GroupRowExpanding event is handled, and the event parameter's Allow property is set to false when the RowHandle property returns the 'Status: Invalidated' row's handle, or an invalid handle (this happens when all group rows are about to be expanded).

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