How do I print an HTML document from a web service?

Question

I want to print HTML from a C# web service. The web browser control is overkill, and does not function well in a service environment, nor does it function well on a system with very tight security constraints. Is there any sort of free .NET library that will support the printing of a basic HTML page? Here is the code I have so far, which does not run properly.

public void PrintThing(string document)
{
    if (Thread.CurrentThread.GetApartmentState() != ApartmentState.STA)
    {
        Thread thread =
            new Thread((ThreadStart) delegate { PrintDocument(document); });
        thread.SetApartmentState(ApartmentState.STA);
        thread.Start();
    }
    else
    {
        PrintDocument(document);
    }
}

protected void PrintDocument(string document)
{
    WebBrowser browser = new WebBrowser();
    browser.DocumentText = document;
    while (browser.ReadyState != WebBrowserReadyState.Complete)
    {
        Application.DoEvents();
    }
    browser.Print();
}

This works fine when called from UI-type threads, but nothing happens when called from a service-type thread. Changing Print() to ShowPrintPreviewDialog() yields the following IE script error:

Error: dialogArguments.___IE_PrintType is null or not an object.

URL: res://ieframe.dll/preview.dlg

And a small empty print preview dialog appears.

Solution 1

You can print from the command line using the following:

rundll32.exe %WINDIR%\System32\mshtml.dll,PrintHTML "%1"

Where %1 is the file path of the HTML file to be printed.

If you don't need to print from memory (or can afford to write to the disk in a temp file) you can use:

using (Process printProcess = new Process())
{
    string systemPath = Environment.GetFolderPath(Environment.SpecialFolder.System);
    printProcess.StartInfo.FileName = systemPath + @"\rundll32.exe";
    printProcess.StartInfo.Arguments = systemPath + @"\mshtml.dll,PrintHTML """ + fileToPrint + @"""";
    printProcess.Start();
}

N.B. This only works on Windows 2000 and above I think.

Solution 2

I know that Visual Studio itself (at least in 2003 version) references the IE dll directly to render the "Design View".

It may be worth looking into that.

Otherwise, I can't think of anything beyond the Web Browser control.

Solution 3

Easy! Split your problem into two simpler parts:

1. render the HTML to PDF
2. print the PDF (SumatraPDF)

• -print-to-default $file.pdf prints a PDF file on a default printer
• -print-to $printer_name $file.pdf prints a PDF on a given printer

Solution 4

If you've got it in the budget (~$3000), check out PrinceXML.

It will render HTML into a PDF, functions well in a service environment, and supports advanced features such as not breaking a page in the middle of a table cell (which a lot of browsers don't currently support).

Solution 5

I tool that works very well for me is HiQPdf. https://www.hiqpdf.com/

The price is reasonable (starts at $245) and it can render HTML to a PDF and also manage the printing of the PDF files directly.

View more solutions

Comments

[Chris Marasti-Georg]

@mruanova None of the answers worked last I tried them. If you have something that works let us know.

[vpalmu]

I know this was considered a good question in '08 but it's offtopic now.

[Chris Marasti-Georg]

@Joshua how so?

[vpalmu]

See meta.stackoverflow.com/questions/251134/…

[Chris Marasti-Georg]

Last I checked, part 2 (printing via command line with Adobe) does not work in a service - it requires user interaction.

[Colonel Panic]

Try Sumatra PDF it's much faster blog.kowalczyk.info/software/sumatrapdf/…

[LukaszTaraszka]

Unfortunately printer dialog appears. I tested on Windows 7 x64.

[Nyerguds]

@ColonelPanic Wow. Great hint. Took me ages to find one that works even from a service, and it seems SumatraPdf is actually usable in commercial packages.