How to: Retrieval of thumbnail URLs (GroupDocs.Viewer)

alcarazjerson · November 9, 2015, 2:56am

Hello,

I just want to ask if there is a way that we can retrieve the thumbnail of the files being previewed programmatically? We want to use those thumbnails as a profile image. Below is a sample link of a file thumbnail.

https://testsite.com/document-viewer/GetDocumentPageImage?path=temp%5cS%5cTest_PPTFILE.pdf&width=150&quality=20&usePdf=True&useHtmlBasedEngine=True&rotate=False&locale=en-US&pageIndex=0

pavelteplitsky · November 9, 2015, 6:31am

Hello,

Thank you for the request. Unfortunately GroupDocs.Viewer doesn’t have special method to obtain document thumbnails. But you can try to get them via the URL from your request. You should do next:

1. Generate document cache how described here

2. Use the URL to get thumbnails with such header parameters: Screenshot by Lightshot

Where:

path - file name

pageindex - page number

useHtmlBasedEngine:False - should be false always.

Best regards.