A set of .NET Framework managed libraries for developing graphical user interfaces.
Hi @Jhun Barcelona
SSRS does not allow Tablix in headers and footers. Headers and footers can contain static text, images, lines, rectangles, borders, background colors, background images, and expressions. For more information you can check this link: https://learn.microsoft.com/en-us/sql/reporting-services/report-design/page-headers-and-footers-report-builder-and-ssrs?view=sql-server-ver16.
If you want to show multiple Payment types, you may refer to this link: https://social.msdn.microsoft.com/Forums/sqlserver/en-US/6d1fafb5-928a-45fd-92c8-6d231c745652/using-join-function-for-fields-values-from-data-set-in-ssrs-2008?forum=sqlreportingservices.
Best regards,
Aniya