Printing multiple copies using ICoreWebView2’s Print function

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I’m trying to print multiple copies of an HTML document using the ICoreWebView2_16‘s Print() function. The documentation states that “Only one Printing operation can be in progress at a time.”. I’ve tried using a for loop to print multiple times:

for I := 1 to NumberOfCopies do
      begin
          (EdgeBrowser.DefaultInterface as ICoreWebView2_16).Print(PrintSettings, CoreWebView2PrintCompletedHandler);
      end;

This doesn’t work because, as stated, only one print operation can happen at a time.

I’ve also tried using the PrintSettings parameter to indicate the number of copies, but there are no members for setting the number of copies in the ICoreWebView2PrintSettings interface. There is a member for settings the number of copies in the ICoreWebView2PrintSettings2 interface… But that can’t be used as a parameter for the ICoreWebView2_16.Print function.

  • Just to note, if I use the ShowPrintUI function, the user can select the number of copies to print… but this doesn’t work because it doesn’t allow me to use my custom PrintSettings

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  • What’s CoreWebView2PrintCompletedHandler? Wouldn’t that be a perfect place to start the next of N print operation?

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  • @AmigoJack After calling the Print function, CoreWebView2PrintCompletedHandler stays nil forever.

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  • CoreWebView2PrintCompletedHandler is a function expected to called, not to be set. Since your example code doesn’t include if it’s a variable or a function I can only guess. Handing over a variable that you expect to be set (to what exactly?) is wrong.

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TEdgeBrowser uses an old WebView2 version. Consider using WebView4Delphi and you’ll be able to set the TWVBrowser.CoreWebView2PrintSettings.Copies property value and then simply call TWVBrowser.Print.

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