CefSharp PrintToPdfAsync not using external CSS?

[Jeff Godfrey]

I'm using CefSharp (v63) to convert *local* HTML-based reports to PDF for portability. Generally, this works exactly as intended. However, it seems that if the HTML references an *external* CSS stylesheet, the styles are not represented in the exported PDF file.

Note, the rendered HTML shown in my CefSharp-based app looks as expected. That is, the stylesheet info is being used there. However, once I export the document to PDF (via PrintToPdfAsync), the stylesheet info seems to be lost or no longer referenced lost.

Specifically, I notice issues in table formats (no backgrounds, no borders, incorrect padding, ...).

If I instead put the CSS styles directly within the HTML file (instead of referencing it externally) the PDF does reflect the correct styles. While I haven't looked at the core code involved here, I assumed the PDF export was driven from the already-rendered browser document (which, again, is correct), but maybe that's not the case?

Thanks for any tips or pointers.

[Jeff Godfrey]

So, this seems to be less a bug and more an issue of my document missing a print-specific style sheet. Defining a print style sheet has mostly fixed the issue. At least now my table styling is generally correct, though I can't get any cell background colors to render to PDF - even after enabling the PdfPrintSettings.BackgroundsEnabled property. Also, the results I see from my CefSharp-based app are identical to what i see if I view the same file in Chrome and look at the print preview there. So, whatever the issue, it's related to the Chrome core and not CefSharp specifically