FlexReport allows using FlexChart field to render a FlexChart in FlexReport and perform grouping and aggregation in it. Let us create a report to show grouping and aggregation of data.

The image below shows FlexReport containing FlexChart field where grouping and aggregation is performed on data.

To create a report showing grouping and aggregation of data in FlexChart, follow these steps.

1. In the C1FlexReportDesigner application, create a new report by navigating through the Report Wizard.
2. Bind the report to the Main data source, by specifying the following Sql Statement.
   SELECT Categories.*, Categories.CategoryID as CategoryID, Products.* FROM Categories INNER JOIN Products ON Categories.CategoryID = Products.CategoryID
   
   
3. Add a SubSection to the Header section and add FlexChart field to it.
4. In the Properties window, expand AxisX and set the value of LabelAngle property to -10.
5. Navigate to AxisX|Style and set Font properties to Arial, 9pt, Regular, StrokeColor to Olive, and StrokeWidth to 30.
6. Navigate to AxisY and set Font properties to Arial, 9pt, Regular, StrokeColor to Olive, and StrokeWidth to 15.
7. Set the Border Color to Black, Style to Solid and Width to 10.
8. Navigate to CategoryGroups and click ellipsis button next to it.
   The DataGroup Collection Editor opens.
9. In the DataGroup Collection Editor, click Add button to add a data group and set it's GroupExpression to CategoryID.
10. Close the Editor.
11. Navigate to Footer|Content and set it to Group By Category and Series.
12. Navigate to Header|Content and set it to Count of products per Category.
13. Navigate to Legend|Title and set it to Reorder Level.
14. Navigate to Series and click the ellipsis button next to it.
15. In the Series Collection Editor, click Add button to add a series.
16. Navigate to Data|YExpression and set it's value to Count(*).
    With Count(*), we are setting aggregate data to the FlexChartField.
17. Close the Editor.
18. Navigate to SeriesGroups and click the ellipsis button next to it.
19. In the Data Group Collection Editor, click Add button to add a series and set it's GroupExpression to RecordLevel.
20. Close the Editor.
21. Navigate to XLabelExpression and set it to CategoryName.
22. Click Preview button to switch to Preview mode to view the report.