Rotativa | Make Pdf from Asp.Net MVC | Model View Controller library

I'm struggling very hard to be able to print a simple certificate template, my current problems are:

1. I need to set two images for background, front page and backpage. Currently I set them up using some css positioning through tags.

2. When I set all the layout, they are fine in the HTML view, however, once I try yo print from browser, or from a custom plugin (rotativa wkhtmlpdf), the layout get messed up and all formatting is gone.

Below is the code: PS. @img_frente and @img_verso are base64 strings for the images as backgrounds.

I am using a digital ocean droplet using Ubuntu 18.04 LTS and deployed my ASP.NET Core 5.0 MVC project on it and everything works great. I was trying to install rotativa on it to print pdf documents but I cannot make this work.

I followed these steps: https://blog.elmah.io/generate-a-pdf-from-asp-net-core-for-free/

But I am getting this error when trying to print the pdf:

Exception: QPainter::begin(): Returned false Exit with code 1, due to unknown error.

I have this in my Startup.cs:

I am currently implementing IdentityServer4 with my microservices to authenticate users. My client application is a MVC project. While I run the project client application return an error as following,

Sorry, there was an error : invalid_scope Invalid scope Request Id: 8000008d-0000-f700-b63f-84710c7967bb

When I removed apiscopes from config file application works fine but then I didn't get any user claims in my authorization handler.

Here's my code

Config.cs

I want to display dynamic header in a cshtml. When i try to pass it using CustomSwitches i get an error like QPaintDevice: Cannot destroy paint device that is being paintedpure virtual method called terminate called without an active exception.

Calling Rotativa component(it's in a class library) from mvc Controller to print the dynamic view without header works correctly but not with the header. Is there anyway to solve this problem?

Thank you for your answers.

Edit: Example using Rotativa

string header = $"/Header.cshtml";

var customSwitches = string.Format("--header-html "{0}" " + "--header-spacing "0" ", header);

I have to send mails in my background application, for this I use Hangfire, but I have to attach a document to each mail with its recipient, the information of the document to be attached is in a table that I convert with rotativa.

My concern is when I want to convert the document into byte[] I always get that the HttpContext is null, obviously because there is no HTTP request which triggers the action while everything is in the background.

Here is my actual code:

I'm new to ASP.NET MVC and I am trying to print the filtered records between two dates to a PDF. I'm using ROTATIVA to generate the PDF, the problem is that the PDF is generated correctly but with all the records and not only with the result of the record filter by the two dates.

Code for the Controller:

I want to send a (view page) pdf sending by email.but when I trying to add an attachment, I found an error below "Add". for that I can't successfully sending mail with attaching my view pdf. Here is my code:

I am generating a pdf, and my employer asked me to add a footer to every single page in the pdf. The pdf gets generated with Rotativa, with a html page that turns into a pdf.

My only problem is, how am i gonna do this. I thought about some ideas, plain css code, although there are more then enough options, none of them really worked out for me. Especially because i can have 1 page, or i can have 10, depends on the amount of information that has to be put onto it.

So the footer has to be responsive to the amount of pages that will be generated.

Does anyone have any ideas for me? I want to get this worked out really bad, but i just have no clue how to.

Greetings Lorenzo Otto

i work with ASP.NET MVC and i try to use rotativa for build a pdf by model. The problem is that in this context i operate in a model (i can't move the code in controller), and i write a procedure into a controller for build pdf. Like this