The RenderBrick event is not raised for column captions when ASPxCardView is exported to PDF.
CardView for WebForms - It is not possible to customize a caption of a certain column in an exported document
Answers approved by DevExpress Support
We have fixed the issue described in this ticket and will include the fix in our next maintenance update. To apply this solution before the official update, request a hotfix by clicking the corresponding link for product versions you require.
Note: Hotfixes may be unavailable for beta versions and updates that are about to be released.
In the context of this hotfix, we introduced the CardViewColumn.ExportCaptionStyle property to customize the appearance of a certain column caption in an exported document.