.NET MAUI DataGrid Aggregates

The DataGrid exposes an Aggregates API through its DataGridColumn.AggregateDescriptors collection, where you can add PropertyAggregateDescriptor and DelegateAggregateDescriptor.

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Aggregate Descriptors

The PropertyAggregateDescriptor enables you to use a set of available functions while the DelegateAggregateDescriptor allows you to implement a custom function through the IAggregateFunction interface.

Aggregates Visualization

You can visualize the aggregates inside the:

• DataGrid Column Footer
• DataGrid Group Header
• DataGrid Group Footer

Aggregates in Column Footer

Use the ShowColumnFooters property to visualize the ColumnFooters of the DataGrid. When applying aggregate descriptor(s) to the column, the aggregate results are displayed inside the column footer.

The aggregate results are displayed inside the column footer only if there is no FooterText set.

Aggregates in Group Header

When grouping is applied to the DataGrid, you can display the aggregate results for the groups data in the group header, next to the title of the group.

To show the Aggregates in the group header, set the ShowGroupHeaderAggregates to True.

Aggregates in Group Footer

When grouping is applied to the DataGrid, you can display the aggregate results for the groups data in the group footer.

To visualize the group footer, set the ShowGroupFooters property to True. The group footer is divided into cells which are aligned with the respective columns and show the aggregate results for the particular column.

For an outline of all DataGrid features, review the .NET MAUI DataGrid Overview article.