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New PDF documents can be created from scratch using the PdfDocument class and save it into a stream, and the stream can be loaded into PdfViewer. So that, saving the document in the disk can be avoided.
Portable/.NET Standard
Add PdfViewer to the MainPage of the application.
XAML
Add a method named “CreateNewPDF” with return type Stream in the code behind of the MainPage. In this method create a PdfDocument instance, set its page size, add a new page to it, and draw the string “Hello World!” on the page. Now, save this PdfDocument instance to a stream and return this stream. C#
The previous example illustrates drawing a simple string on a single page PDF. Refer to the following documentation for creating PDF with more pages and different types of contents such as text, images, tables and more.
https://help.syncfusion.com/file-formats/pdf/working-with-document
In the constructor of the MainPage, call the CreateNewPDF method and load the acquired stream into the PdfViewer.
C#
Sample link: http://www.syncfusion.com/downloads/support/directtrac/general/ze/CreateAndLoadDemo1314775267 |
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The sample works great with the nuget packages included, however, if I update to the new version of PdfViewer (16.3.0.21), it throws an exception:
System.NullReferenceException: Object reference not set to an instance of an object.
Regards.
Hi Héctor,
Sorry for the inconvenience caused.
We are able to reproduce the issue in our end and we will fix this issue in 2018 Vol 3 SP 1 release, which will be available at the end of October 2018. However as a workaround we can reset the stream position of the created PDF document to 0 before loading it in the PDF viewer. We have also refreshed this change in this KB as well as sample attached in this KB.
Regards,
Sathish