Hi Dominik,
Greetings from Syncfusion support,
Based on your information provided, we suspect that you would like to share a particular PDF page in the loaded PDF document upon selection. Your requirement of sharing a particular PDF page can be achieved by exporting the pages of a PDF document as image streams using the ExportAsImage method. The resultant image streams can be saved as image files in the local storage.
Please find the UG documentation to export PDF pages as image,
If our understanding is different from your requirement, kindly explain your requirement of the sharing the particular PDF page and the use case scenario elaborately along with the details, how you want to share the page on selection?. So that it will helpful for us to analyze the issue and provide a better solution at earliest.
Regards,
Ashok Kumar Viswanathan.