vcl-cxcustomdata-274ff76e.md
A collection of footer summaries.
TcxDataFooterSummaryItems = class(
TcxDataSummaryItems
)
A summary controller uses summary item collections to manage group and footer summaries.
The list below outlines key members of the TcxDataFooterSummaryItems class. These members allow you to manage and configure summary items.
AddCreates a new summary item and adds it to the collection.ClearClears the collection.CountReturns the number of stored summary items.Delete | DeleteItemsDelete individual summary items.FindByTagReturns the first summary item in the collection with the specified tag.ItemsProvides indexed access to summary items in the collection.
DefaultFormatReturns the default formatting pattern for the summary item with the specified data type, position, and calculation algorithm.OnSummaryAllows you to customize summary calculation.
AssignCopies settings and stored items between summary item collections.BeginUpdate | EndUpdateAllow you to avoid excessive notifications and corresponding redraw operations during batch collection changes.DataController | SummaryProvide access to parent data and summary controllers.
The TcxDataSummary.FooterSummaryItems property references a TcxDataFooterSummaryItems object.
The TcxDataSummaryItem.SummaryItems property references the TcxDataFooterSummaryItems class as a TcxDataSummaryItems object.
To see group and footer summaries in action, run the Grid and Data Editors demo in the VCL Demo Center installed with compiled DevExpress demos. Click Data Summaries or Advanced Data Filtering in the sidebar to select the corresponding VCL Data Grid demo.
Tip
Compiled DevExpress demos ship with source code installed in the Public Documents folder (%Public%) for all users ( default ). You can find all project and source code files for the Data Grid demo in the following folder:
%Public%\Documents\DevExpress VCL Demos\MegaDemos\Product Demos\ExpressQuantumGrid
TObject TPersistent TCollection TcxCollection TcxDataSummaryItems TcxDataFooterSummaryItems
See Also
TcxDataGroupSummaryItems Class