How to create a PDF and load to Xamarin.Forms PdfViewer without saving to disk?
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
<Grid x:Name="pdfViewGrid"> <syncfusion:SfPdfViewer x:Name="pdfViewerControl" /> </Grid>
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#
private Stream CreateNewPDF()
{
MemoryStream memoryStream = new MemoryStream();
//Create a new PDF document
PdfDocument document = new PdfDocument();
// Set the page size
document.PageSettings.Size = PdfPageSize.A4;
//Add a page to the document
PdfPage page = document.Pages.Add();
//Create PDF graphics for the page
PdfGraphics graphics = page.Graphics;
//Set the font
PdfFont font = new PdfStandardFont(PdfFontFamily.Helvetica, 20);
//Draw the text
graphics.DrawString("Hello World!!!", font, PdfBrushes.Black, new PointF(0, 0));
//Save the document
document.Save(memoryStream);
//Close the document
document.Close(true);
if (memoryStream.CanSeek)
memoryStream.Position = 0;
return memoryStream;
}
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#
public MainPage()
{
InitializeComponent();
Stream fileStream = CreateNewPDF();
pdfViewerControl.LoadDocument(fileStream);
}
Sample link:
Conclusion
I hope you enjoyed learning about how to create a PDF and load to PdfViewer without saving to disk.
You can refer to our Xamarin PDF Viewer feature tour page to know about its other groundbreaking feature representations. You can also explore our documentation to understand how to create and manipulate data.
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