How to create a PDF and load to 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:
https://www.syncfusion.com/downloads/support/directtrac/general/ze/CreateAndLoadDemo1314775267
