PrintAsync for pdf files prints blank pages

[AndyInside]

Description

Version
SDK: 1.0.1938.49
Runtime: 116.0.1938.76
Framework: .NET6
OS: Windows 10

PrintAsync for pdf files prints blank pages, it seems that print starts before pdf is fully loaded, and there is no way to find it out. only Thread.Sleep before printing helps. I use 10 seconds timeout , but anyway sometimes it happens,
please help! thanks!

AB#46632667

[monica-ch]

@AndyInside I am trying to understand when your app calls the WebView2 PrintAsync API?

[akoessler]

I too encountered this problem today.

We want to print a pdf file completely in background from a console application, and I have tried that today using PrintAsync.
That worked well, but also only if I wait some time after the navigation, before the print.
If I do not wait, the result is a blank page.
Waiting for NavigationCompleted event or other events does not help.

For my small test pdf file i needed to wait at least 500ms for it to be then printed correctly.

See my example code and my test pdf file as attachment.
Program.txt
test.pdf

SDK: 1.0.2045.28
Runtime: 117.0.2045.41
.NET 4.7.2
Windows 10

[AndyInside]

@AndyInside I am trying to understand when your app calls the WebView2 PrintAsync API?

1. CoreWebView2.Navigate("1.pdf")
2. await CoreWebView2.PrintToPdfAsync()

Navigation to pdf file ignores any state events like NavigationCompleted, PrintToPdfAsync starts printing immediately before pdf is loaded ( so prints empty pages)

[docfresh]

Can confirm, the code from @akoessler is reproducible for me. Sometimes the only information available is the "OtherError" print status ... can we get additional information from the CoreWebView2PrintStatus class? Like what the other error actually is.

[nishitha-burman]

Fixed in version 123.0.2376.0+