.Net Core 2.2 - After publishing a Webapp, the links were not working and the generated HTML code was the same as Razor

Question

I am publishing a Net Core Webapp (version 2.2.108) on the Smaterasp.net host in "self-contained Deployment mode".

My file . CSPROJ looks like this:

  <PropertyGroup>
    <TargetFramework>netcoreapp2.2</TargetFramework>
    <AspNetCoreHostingModel>InProcess</AspNetCoreHostingModel>
    <UserSecretsId>438bea06-a241-4638-a75d-2c9de371a6b3</UserSecretsId>
    <AssemblyName>ProjectName.UI.Web.Admin</AssemblyName>
    <PreserveCompilationContext>true</PreserveCompilationContext>
    <MvcRazorExcludeRefAssembliesFromPublish>false</MvcRazorExcludeRefAssembliesFromPublish>
  </PropertyGroup>

After publishing and running the Webapp I saw that the links were not working and the generated HTML code was the same as Razor, like this:

<a asp-area="" asp-controller="Ticket" asp-action="Index">Tickets</a>

But the right thing should be:

<a href="/Ticket/Index">Tickets</a>

If I publish without the parameters below:

<PreserveCompilationContext>true</PreserveCompilationContext>
<MvcRazorExcludeRefAssembliesFromPublish>false</MvcRazorExcludeRefAssembliesFromPublish>

I have the following mistake:

Error - The type 'Attribute' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=

Can you tell me what I did wrong or how to adjust it?

Thank you for your attention.

Answer 1

Take a look if you are properly importing the lib cm the tagHelpers. Take a look at this article: https://www.koskila.net/how-to-fix-microsoft-aspnetcore-mvc-taghelpers-not-being-rendered/. Perhaps it can help to understand the problem. I suspected that perhaps these Imports were missing.

See if you have a _Viewimports.cshtml file in the "Views" folder with the contents:

@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers

To be more specific and help with common errors that may occur, please follow the related documentation link, which deals with the _Viewimports.cshtmlfile. There he explains exactly how it works, the directives for which he supports and also explains the following:

"The _Viewimports.cshtml file for an ASP.NET Core MVC application is usually placed in the Pages (or Views) folder. A file _Viewimports.cshtml can be placed in any folder, in which case it will only be applied to pages or views in that folder and its subfolders. _Viewimports files are processed starting at level root and then for each folder up to the location of the page or the display itself. The _Viewimports settings specified in the level root can be overwritten at folder level."

https://docs.microsoft.com/pt-br/aspnet/core/mvc/views/layout?view=aspnetcore-2.2#importing-Shared-Directives

And, as the article suggests, the lack of this file leads to the error reported in the question: Taghelpers are not compiled.

Now I hope I’ve helped.