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sirdaiz
Asked: 2020-07-31 23:18:20 +0800 CST 2020-07-31 23:18:20 +0800 CST

.NET Core 3.0 (Preview) - Visual Studio does not automatically recompile Razor views

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I was testing with .Net CORE 2.2 projects and if I modified something in the views I could see the changes automatically reflected without having to stop the execution or recompile. However, I upgraded to .Net CORE 3.0 using razor pages and when I change the view and save I have to stop the execution, compile again and run in order to see the changes reflected, is this normal?

visual-studio

1 Answers

  1. Best Answer

    The behavior you describe is normal and is due to a cleanup of the ASP.NET Core framework to remove dependencies on Roslyn (C# and VB.NET compiler). For this reason, the ability to recompile views and Razor pages has been extracted to a nuget package. The most up-to-date information on this is at the following link: https://github.com/aspnet/AspNetCore/issues/7647 .

    Starting with .NET Core 3 Preview 3, it is possible to add the ability to recompile Razor to our ASP.Net Core projects. For this we must:

    1. Add a reference to the Nuget package Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation( nuget package ).

    2. Update ConfigureServicesour app's method to include a call to the AddRazorRuntimeCompilationor method AddMvcRazorRuntimeCompilation. The name of the method depends on the version of .NET Core 3 preview that we are using.

      This example shows how to call the method if we are using MVC:

      public void ConfigureServices(IServiceCollection services)
{
    services.AddMvc().AddRazorRuntimeCompilation();
}

      and this would be for Razor pages:

      public void ConfigureServices(IServiceCollection services)
{
    services.AddRazorPages().AddRazorRuntimeCompilation();
}
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