Microsoft LocalReport (rdl) in ASP.NET Core MVC App

In the end we came up with a totally other approach.

We just created a new Application called "DocumentService" on .NET Framework running as a Service on a Windows Server. The service was checking a database if there are new jobs in the database queue and if so, it generates the pdf result and stores it in the database.

So the web application was not longer responsible for creating the pdf, it only added a new line in the database so mark that a new document should be created. The DocumentService app then generated the document and the web app could access the data in the database.

We can use this "DocumentService" in other part of our application landscape and therefore the effor was worth it. It app is also multithreaded and working pretty fast and well.

No you can't include System.Web. I had same problem and solved it with AspNetCore.Reporting. You can download this from NuGet. This can be useful: https://www.dotnetcurry.com/aspnet/844/aspnet-ssrs-reports-programmatically-html