When Adobe Reader displays a directory of PDF files, it shows a thumbnail picture of the PDF. Where does the image come from? Is it possible to get the thumbnail image from the PDF with the SyncFusion PDF library?
Thank you for your interest in Syncfusion Products.
The thumbnail picture is taken from the first page of the Pdf.
You can get the first page by using the Export to image option.
I have attached a sample for your reference.
Please let us know if you have any concern.
Thanks for your update.
At present, we do not have the direct support of exporting images from Pdf document in PdfViewer MVC. But this can be achieved by using PdfViewer Windows.
We have created a simple sample to export the pdf document as images and the sample can be downloaded from the below link.
In this sample we have exported images using our PdfViewer Control for Windows. We can find the exported images at “AppData/ExportedImages” folder. Also, we have attached the “PdfViewer.Windows.dll”.
Please, let us know if there is any concerns.