form flatten

[Vignesh]

Is form flattening available create with ui interaction? if available please say how to achieve that

[Dhivyabharathi Mohan]

Hi Vignesh, 

  

Syncfusion PDF VIEWER does not have direct support to flatten the form fields in UI. However, you can flatten the form fields using the Syncfusion PDF Base library. We have shared the sample and code snippets for flattening the form fields while downloading the document from the PDF Viewer.  

  

 

Web Service: https://www.syncfusion.com/downloads/support/directtrac/general/ze/Web_Service212047989  

  

Run the web service and then run the React sample 

  

 

React Sample: https://stackblitz.com/edit/react-zohq6y-1jo8m1?file=index.js  

 

 

Code snippets for flattening the PDF document: 

public IActionResult Download([FromBody] Dictionary<string, string> jsonObject) 

        { 

            MemoryStream stream = new MemoryStream(); 

            PdfRenderer pdfviewer = new PdfRenderer(_cache); 

            string documentBase = pdfviewer.GetDocumentAsBase64(jsonObject); 

            string base64String = documentBase.Split(new string[] { "data:application/pdf;base64," }, StringSplitOptions.None)[1]; 

            if (base64String != null || base64String != string.Empty) 

            { 

                byte[] byteArray = Convert.FromBase64String(base64String); 

                //Create the form if the form does not exist in the loaded document 

                PdfLoadedDocument loadedDocument = new PdfLoadedDocument(byteArray); 

                //Get the loaded form. 

 

                PdfLoadedForm loadedForm = loadedDocument.Form; 

 

                PdfLoadedFormFieldCollection fields = loadedForm.Fields; 

 

               //Flatten the whole form. 

 

                loadedForm.Flatten = true; 

 

                //Save the document into stream 

                loadedDocument.Save(stream); 

                stream.Position = 0; 

 

                loadedDocument.Close(); 

 

                documentBase = string.Concat("data:application/pdf;base64,", Convert.ToBase64String(stream.ToArray())); 

 

        } 

            return Content(documentBase); 

    } 

 

  

Please try this and revert to us, if you need further assistance. 

  

 

Regards, 

Dhivya.