DotNetBrowser 2.4

What’s New

Printing API

The Printing API is back – improved and redesigned. Now you can print pages and documents as well as savе web pages to PDF silently from the code.

With the new Printing API you can:

select a printer device;
provide the required print settings such as paper size, orientation, page ranges, etc.;
get notifications when printing is completed;
cancel printing;
save the currently loaded web page to a PDF document and more.

The following example demonstrates how to save the currently loaded web page as a PDF:

// Tell the Chromium engine to perform the printing programmatically.
browser.RequestPrintHandler =
    new Handler<RequestPrintParameters, RequestPrintResponse>(p =>
    {
        return RequestPrintResponse.Print();
    });

// This handler is used for printing regular web pages programmatically.
browser.PrintHtmlContentHandler 
    = new Handler<PrintHtmlContentParameters, PrintHtmlContentResponse>(p =>
    {
        string pdfFilePath = Path.GetFullPath("result.pdf");

        // Get the print job for the built-in PDF printer.
        IPrintJob<PdfPrinter.IHtmlSettings> printJob = p.Printers.Pdf.PrintJob;

        // Subscribe to its PrintCompleted event and show a message box when it's done.
        printJob.PrintCompleted += (sender, args) => 
        { 
            BeginInvoke((Action) (() => 
                { MessageBox.Show("Printing completed: \n"+pdfFilePath); }));
        };

        // Apply the necessary print settings
        printJob.Settings.Apply(s =>
        {
            // Enable printing header and footer.
            s.PrintingHeaderFooterEnabled = true;
            // Specify the path to save the result.
            s.PdfFilePath = pdfFilePath;
        });

        // Tell Chromium to use the built-in PDF printer for printing.
        return PrintHtmlContentResponse.Print(p.Printers.Pdf);
    });

// Load the web page and wait until it is loaded completely.
browser.Navigation.LoadUrl("teamdev.com").Wait();
// Initiate printing.
browser.MainFrame.Print();

.NET 5 support

DotNetBrowser is tested and proven to integrate with .NET 5 desktop applications.

Improvements

The Print Preview dialog has been clipped off from the top of the form and positioned lower to improve user experience.
AuthenticateParameters.Realm property was added to provide the realm of the authentication challenge.

Fixed issues

Excessive CPU and GPU usage by the native process with multiple tabs with WPF BrowserView instances in the hardware-accelerated mode.
WPF BrowserView crashing in the hardware-accelerated mode.
Few memory leaks for registering/unregistering .NET objects via JS-.NET bridge.
The Tab key not working properly with WPF BrowserView.
The scrolling of a page stopping if the mouse pointer is hovered out of WPF BrowserView component in the Off-screen rendering mode.
The focus traversal entering the infinite loop when displaying a popup.

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