How use Create PDFs from HTML with Responsive CSS Layouts and Bootstrap with ASP.Net?

IronPDF will happily render a screen stylesheet to a PDF by default. This is convenient because print stylesheets are rarely as well documented, used or developed as their screen counterparts.

This gives us pixel by pixel rendering accuracy of what you see in the browser into a PDF.

There are, however, caveats with responsive design and frameworks such as Bootstrap.

Responsive web design relies on knowing the size of your browser window. When we render a web page headlessly there is no viewport - and the smallest resolution (mobile) version of the website will normally be rendered.

There are 2 Solutions:

Using Print CSS (CSS3)

Print CSS is often more appropriate for rendering html-to-pdf than Screen CSS&.

We must:

  1. Create and apply a print stylesheet to our HTML:

  2. Tell IronPDF to Prefer Print Stylesheets over Screen programmatically.
var Renderer = new IronPdf.HtmlToPdf();

Renderer.PrintOptions.CssMediaType = PdfPrintOptions.PdfCssMediaType.Print;

var PDF = Renderer.RenderUrlAsPdf("\_Document\_Format");
Dim Renderer As var = New IronPdf.HtmlToPdf
Renderer.PrintOptions.CssMediaType = PdfPrintOptions.PdfCssMediaType.Print
Dim PDF As var = Renderer.RenderUrlAsPdf(quot)
VB   C#

Avoiding Unnecessary Frameworks

In general responsive frameworks add huge volumes of minified css, javascript and html code to an application which the develop did not write themselves.

Wherever possible avoid their use in HTML to PDF rendering for full control of your PDF layout and design.