Hi Osiris,
Thank you for contacting Syncfusion Support.
Yes, it is possible to load the PDF documents from ‘C:\’ drive into the PDF viewer using the
Load() API in Web API controller. Please find the getting started UG document of PDF viewer control from the below, you can also use the sample available in the getting started to try this,
Please try this and let us know if it helps.
Regards,
Akshaya