Use Layout in ASP.NET Core Razor Pages

On the Visual Studio, create new ASP.NET Core Web Application project

Select Empty Template

Click Ok button to Finish

Open Startup.cs file and add new configurations as below:

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;

namespace LearnASPNETCoreRazorPagesWithRealApps
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc();
        }

        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseStaticFiles();

            app.UseMvc();
        }
    }
}

Select Views folder and right click to select Add\New Item Menu

Select Web\ASP.NET in left side. Select Razor View Imports item and click Add button to Finish

In _ViewImports.cshtml file and TagHelpers library as below:

@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers

Create new folder named Pages. In Pages folder, create new folder named Shared. In Shared folder, create Razor Layout named _MyLayout.cshtml as below:

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>@ViewBag.Title</title>
</head>
<body>

    <a asp-page="index">Home</a> |
    <a asp-page="aboutus">About Us</a> |
    <a asp-page="news">News</a>
    <br /><br />
    @RenderBody()
    <br /><br />
    Copyright PMK Lab

</body>
</html>

In Pages folder, create new Razor Page named Index as below:

using Microsoft.AspNetCore.Mvc.RazorPages;

namespace LearnASPNETCoreRazorPagesWithRealApps.Pages
{
    public class IndexModel : PageModel
    {
        public void OnGet()
        {
        }
    }
}

@page
@model LearnASPNETCoreRazorPagesWithRealApps.Pages.IndexModel
@{
    ViewData["Title"] = "Home";
    Layout = "~/Pages/Shared/_MyLayout.cshtml";
}

<h1>Home Page</h1>

In Pages folder, create new Razor Page named AboutUs as below:

using Microsoft.AspNetCore.Mvc.RazorPages;

namespace LearnASPNETCoreRazorPagesWithRealApps.Pages
{
    public class AboutUsModel : PageModel
    {
        public void OnGet()
        {
        }
    }
}

@page
@model LearnASPNETCoreRazorPagesWithRealApps.Pages.AboutUsModel
@{
    ViewData["Title"] = "About Us";
    Layout = "~/Pages/Shared/_MyLayout.cshtml";
}

<h1>About Us Page</h1>

In Pages folder, create new Razor Page named News as below:

using Microsoft.AspNetCore.Mvc.RazorPages;

namespace LearnASPNETCoreRazorPagesWithRealApps.Pages
{
    public class NewsModel : PageModel
    {
        public void OnGet()
        {
        }
    }
}

@page
@model LearnASPNETCoreRazorPagesWithRealApps.Pages.NewsModel
@{
    ViewData["Title"] = "News";
    Layout = "~/Pages/Shared/_MyLayout.cshtml";
}

<h1>News</h1>

Open Index Razor Page with following url: http://localhost:1115

Open AboutUs Razor Page with following url: http://localhost:1115/AboutUs

Open News Razor Page with following url: http://localhost:1115/News

Create ASP.NET Core Razor Pages Project

Configurations

Create Razor View Imports

Layout Page

Index Razor Page

Index.cshtml.cs

Index.cshtml

AboutUs Razor Page

AboutUs.cshtml.cs

AboutUs.cshtml

News Razor Page

News.cshtml.cs

News.cshtml

Structure of ASP.NET Razor Pages Project

Run Application