After navigating to a pdf file (local file), I am running the following code which should send the current document to the default printer:
CoreWebView2Environment webView2Environment = await CoreWebView2Environment.CreateAsync();
CoreWebView2PrintSettings printerSettings = webView2Environment.CreatePrintSettings();
CoreWebView2PrintStatus printStatus =
await webView2.CoreWebView2.PrintAsync(
printerSettings
);
My default printer is "Microsoft Print to PDF".
The print status is Succeeded and a pdf is created but it is entirely blank. When I print a local jpeg file it works as expected.
What am I doing wrong?
Related
I have been working on getting a PDF Viewer working in Net MAUI. In Xamarin, I displayed a PDF in Webview. Not a problem. In MAUI, you don't do that. I installed SpirePDF(free) and have it loading the PDF from file. When adding it to VerticalStackLayout (which will be the Content for a ScrollView), it fails on conversion to IView. Any ideas or suggestions?
VerticalStackLayout vsl = new VerticalStackLayout(); PdfDocument viewPdf = new PdfDocument(); Assembly.GetExecutingAssembly().GetType().GetTypeInfo().Assembly.GetManifestResourceStream("CommanderGrady.Resources.Images.adventure218.pdf"); viewPdf.LoadFromFile(#"C:\Users\leuol\source\repos\CommanderGrady\CommanderGrady\Resources\Images\adventure218.pdf"); vsl.Add((IView)viewPdf); return vsl; }
I have done a sample and the pdf can show in the browser. So you can try the following code.
string fullpath = xxx; // provide the file path
await Launcher.OpenAsync(new OpenFileRequest
{
File = new ReadOnlyFile(fullpath)
});
I want to save an IDocumentPaginatorSource, e.g. FixedDocument or XpsDocument, as a PDF by using the virtual printer "Microsoft Print to PDF":
var printServer = new System.Printing.PrintServer();
var queue = printServer.GetPrintQueue("Microsoft Print to PDF");
var writer = System.Printing.PrintQueue.CreateXpsDocumentWriter(queue);
writer.Write(Document.DocumentPaginator); // Document = IDocumentPaginatorSource
This works, but makes the printer open a file save dialog. I would like to set the file name programmatically and either suppress this dialog completely or at least set the initial file name in the dialog. Is this possible?
I know, that this can be done when using System.Drawing.Printing.PrintDocument by setting PrinterSettings.PrintFileName and PrinterSettings.PrintToFile (see 1, 2), but this is the old printing framework that does not support IDocumentPaginatorSource.
I checked all classes in the System.Printing namespace but did not find any way to set these two settings. Maybe it's possible to retrofit these seetings into the PrintTicket by extending the print schema? If so, how exactly would you do that?
I don't have a solution using the "Microsoft Print to PDF printer", but if you switched to using the Win2PDF printer driver you can set the file name programatically through the registry. To do this, see the documentation for the "PDFFileName" or "PDFDefaultFileName" registry settings.
After struggling whole day, I identified the issue but this didn't solve my problem.
On short:
I need to open a PDF, convert to BW (grayscale), search some words and insert some notes nearby found words. At a first look it seems easy but I discovered how hard PDF files are processed (having no "words" concepts and so on).
Now the first task, converting to grayscale just drove me crazy. I didn't find a working solution either commercial or free. I came up with this solution:
open the PDF
print with windows drivers, some free PDF printers
This is quite ugly since I will force the C# users to install such 3'rd party SW but.. that is fpr the moment. I tested FreePDF, CutePDF and PDFCreator. All of them are working "stand alone" as expected.
Now when I tried to print from C#, obviously, I don't want the print dialog, just select BW option and print (aka. convert)
The following code just uses a PDF library, shown for clarity only.
Aspose.Pdf.Facades.PdfViewer viewer = new Aspose.Pdf.Facades.PdfViewer();
viewer.BindPdf(txtPDF.Text);
viewer.PrintAsGrayscale = true;
//viewer.RenderingOptions = new RenderingOptions { UseNewImagingEngine = true };
//Set attributes for printing
//viewer.AutoResize = true; //Print the file with adjusted size
//viewer.AutoRotate = true; //Print the file with adjusted rotation
viewer.PrintPageDialog = true; //Do not produce the page number dialog when printing
////PrinterJob printJob = PrinterJob.getPrinterJob();
//Create objects for printer and page settings and PrintDocument
System.Drawing.Printing.PrinterSettings ps = new System.Drawing.Printing.PrinterSettings();
System.Drawing.Printing.PageSettings pgs = new System.Drawing.Printing.PageSettings();
//System.Drawing.Printing.PrintDocument prtdoc = new System.Drawing.Printing.PrintDocument();
//prtdoc.PrinterSettings = ps;
//Set printer name
//ps.PrinterName = prtdoc.PrinterSettings.PrinterName;
ps.PrinterName = "CutePDF Writer";
ps.PrintToFile = true;
ps.PrintFileName = #"test.pdf";
//
//ps.
//Set PageSize (if required)
//pgs.PaperSize = new System.Drawing.Printing.PaperSize("A4", 827, 1169);
//Set PageMargins (if required)
//pgs.Margins = new System.Drawing.Printing.Margins(0, 0, 0, 0);
//Print document using printer and page settings
viewer.PrintDocumentWithSettings(ps);
//viewer.PrintDocument();
//Close the PDF file after priting
What I discovered and seems to be little explained, is that if you select
ps.PrintToFile = true;
no matter C# PDF library or PDF printer driver, Windows will just skip the PDF drivers and instead of PDF files will output PS (postscript) ones which obviously, will not be recognized by Adobe Reader.
Now the question (and I am positive that others who may want to print PDFs from C# may be encountered) is how to print to CutePDF for example and still suppress any filename dialog?
In other words, just print silently with programmatically selected filename from C# application. Or somehow convince "print to file" to go through PDF driver, not Windows default PS driver.
Thanks very much for any hints.
I solved conversion to grayscale with a commercial component with this post and I also posted there my complete solution, in care anyone will struggle like me.
Converting PDF to Grayscale pdf using ABC PDF
I am using PrintTicket object (printTicket.Stapling = Stapling.StapleTopLeft;) and using PrintQueue.Addjob method in System.printing to enable stapling option. Stapling is working fine with XPS document, but not working with PDF documents. Here is my code:
PrintTicket printTicket = printQueue.DefaultPrintTicket;
printTicket.Stapling = Stapling.StapleTopLeft;
printQueue.CurrentJobSettings.CurrentPrintTicket = printTicket;
printQueue.AddJob("TEST", "C:\\TEST.XPS", false, printTicket);
TEST.XPS is printing and stapling, but changing the file to PDF is not working.
If you look at the MDSN for that AddJob method it specifically says it for XPS documents only.
https://msdn.microsoft.com/en-us/library/jj205516%28v=vs.110%29.aspx
Inserts a new print job for an XML Paper Specification (XPS) Document
into the queue, gives it the specified name and settings, and
specifies whether or not it should be validated.
I am using Amyuni PDF Creator .Net to print PDF using a Windows service.
Windows service is running under Local System user account. When I tried to print using above library, it prints the PDF in wrong font. See the attachment (Wrong font in PDF printing).
This issue persists with only some of the printers such as Brother MFC-8890DW Printer.
But for the same printer with above windows service, it prints the PDF properly when unchecked the Enable advanced printing features setting in above printer Properties. See the attachment (Disable Advanced printing features).
using (FileStream file1 = new FileStream(pdfFile, FileMode.Open, FileAccess.Read))
{
using (IacDocument doc1 = new IacDocument())
{
doc1.Open(file1, string.Empty);
doc1.Copies = 1;
bool printed = doc1.Print(printer, false);
}
}
But same windows service prints PDF correctly for some other printers such as HP LaserJet P1005 either Enable advanced printing features checked or unchecked.
Without having access to the same printer that you are using it is hard to know exactly what is happening. My best guess would be that the driver of this printer has issues dealing with process-level fonts (those that are registered using the GDI function AddFontResourceEx) when "Enable advanced printing features" is checked. This is how Amyuni PDF Creator uses fonts embedded in the PDF file, which is the case for the file that you have presented.
A possible workaround for this could be to use the attribute "PrintAsImage" of the Document class.
The code would look like this:
//set license key This is needed only with licensed version
acPDFCreatorLib.SetLicenseKey("your company", "your activation code");
//Create a new document instance
Amyuni.PDFCreator.IacDocument doc = new Amyuni.PDFCreator.IacDocument(null);
doc.AttributeByName("PrintAsImage").Value =1;
//Open the file here (...)
//Print to default printer
pdfCreator1.Document.Print("", false);
Another alternative would be to save your file as xps using Amyuni PDF Creator then send the xps file to the printer:
// Create print server and print queue.
LocalPrintServer localPrintServer = new LocalPrintServer();
PrintQueue defaultPrintQueue = LocalPrintServer.GetDefaultPrintQueue();
defaultPrintQueue.AddJob("my document", "c:\\temp\\mytempfile.xps", true);
Disclaimer: I work for Amyuni Technologies.