pdfviewer get file loaded in server side from asp button

[Giovanni]

how is it possible to download the file loaded in the pdfviewver control in the code behind from an asp button?
Thanks

[Akshaya Arivoli]

Hi Giovanni, 

Thank you for contacting Syncfusion support. 

We can download the PDF documents from the code behind using the download() API available in PDF Viewer. Refer to the following code snippet 

 <button onclick="download();">Download</button> 

 

<script> 

  function download(){ 

  var pdfviewer = document.getElementById('PdfViewer').ej2_instances[0];   

  pdfviewer.download(); 

 

  } 

  </script> 

 

Sample: https://stackblitz.com/edit/g3ndgj?file=index.html  

Kindly try it and revert us with more details about your requirement if you still have concerns about it.  

Regards,  

Akshaya   

[Giovanni]

thanks but I would need to know how to do it with ej1 no ej2

ej2 i can't install it gives me the following error

Error Unable to add reference to "pdfium".
Verify that the file is accessible and that the COM component or assembly is valid.

Thanks

[Akshaya Arivoli]

Hi Giovanni,  

 

Thank you for your update. 

 

Please find the details from the below, 

 

Query	Details
thanks but I would need to know how to do it with ej1 no ej2	We can download the PDF documents from the code behind using EJ1 PDF Viewer. Refer to the following code    <button onclick="download()" type="button">Donwload</button>      var pdfviewerObj = $("#ContentPlaceHolder1_PdfViewer1").data("ejPdfViewer");                          pdfviewerObj.download();    We have created the sample for the same and shared in the below link,    https://www.syncfusion.com/downloads/support/directtrac/general/ze/PdfViewerWeb_(5)1801729852
ej2 i can't install it gives me the following error    Error Unable to add reference to "pdfium". Verify that the file is accessible and that the COM component or assembly is valid.	We have embedded the Pdfium rendering engine in our PDF Viewer for robust rendering, so pdfium dll will be generated on runtime within your project location and there is no need to include the pdfium dll in the project references.     Refer to the below KB link to create pdfviewer web service project in ASP.NET Core     https://www.syncfusion.com/kb/11063/how-to-create-the-pdf-viewer-web-service-application-in-net-core-3-0-and-above-version

 

 

Kindly try it and revert us with more details if you need further assistance. 

 

Regards, 

Akshaya 

[Giovanni]

Thanks it works perfectly.
Just one last thing I can use PdfViewerHelper to get the base64 of the pdf in javascript and not in the code-behind.

I'm looking for a solution to save my pdf file to disk after modifying the fill forms, and know when this happened correctly, to notify the user of the save.

it's possible?

[Akshaya Arivoli]

Hi Giovanni, 

Thank you for your update. 

We can save the PDF documents in the database by modifying the Download() web action method. Refer to the below KB, similarly, you can get the document bytes and then save the save in the database as per your requirement. 

https://www.syncfusion.com/kb/8822/how-to-save-a-pdf-document-by-replacing-the-original-pdf-document-in-the-server-side-of-the  

Also, our PDF Viewer supports downloadStart and downloadEnd event, using that we can track the status of the download action, 

https://help.syncfusion.com/api/js/ejpdfviewer#downloadstart  

https://help.syncfusion.com/api/js/ejpdfviewer#downloadend  

Kindly try it and revert us with more details about your requirement and the modified sample, if you still have concerns about it.   

Regards, 

Akshaya