.NET 7 Core Web App Returns web page not found

Question

.NET 7 Core Web App Returns web page not found

Dave 20

I created a new .NET Core Web App targeting .NET 7. I created the project without authentication and without Docker support. I would expect a new app to run out-of-the-box with the default landing page, but instead I get a "webpage not found, No webpage was found for the web address:" error. It's not hitting the Index OnGet method for the Razor page. This is a simple app that I only intend on running myself, so I won't be using MVC, only Razor. Has anyone solved this in .NET 7?

AgaveJoe 30,126 Reputation points

2023-08-21T13:46:47.48+00:00

There is a problem with the URL you are using or the code. Is there any way you can share the controller and URL so we can see what you're doing?
Dave 20 Reputation points

2023-08-21T15:05:02.8666667+00:00

It is not an MVC Application. I have cross-checked the URL; there's nothing wrong there. Building on https, http or IIS Express, I get the same error
AgaveJoe 30,126 Reputation points

2023-08-21T15:24:22.84+00:00

I cannot reproduce this behavior. I created a Razor Page project in VS 2022, clicked run, and the application opened.

Is there anyway you can show us the URL and the Razor Page source?

Dave 20

Is this what you want me to show?

{   
"iisSettings": {     
	"windowsAuthentication": false,     
	"anonymousAuthentication": true,     
	"iisExpress": {"applicationUrl": "http://localhost:53648",       
		"sslPort": 44328     
		}   
	},   
	"profiles": {     
		"http": {       
			"commandName": "Project",       
			"dotnetRunMessages": true,       
			"launchBrowser": true,       
			"applicationUrl": "http://localhost:5169",      
			 "environmentVariables": {"ASPNETCORE_ENVIRONMENT": "Development"       
			}     
		},     
		"https": {       
			"commandName": "Project",       
			"dotnetRunMessages": true,       
			"launchBrowser": true,       
			"applicationUrl": "https://localhost:7192;http://localhost:5169",       "environmentVariables": {         
			"ASPNETCORE_ENVIRONMENT": "Development"       
			}     
		},     
		"IIS Express": {       
			"commandName": "IISExpress",       
			"launchBrowser": true,       
			"environmentVariables": {"ASPNETCORE_ENVIRONMENT": "Development"       
			}     
		}   
	} 
}

@page
@model IndexModel
@{
    ViewData["Title"] = "Home page";
}

<div class="text-center">
    <h1 class="display-4">Welcome</h1>
    <p>Learn about <a href="https://docs.microsoft.com/aspnet/core">building Web apps with ASP.NET Core</a>.</p>
</div>

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AgaveJoe 30,126 Reputation points

2023-08-21T13:46:47.48+00:00

There is a problem with the URL you are using or the code. Is there any way you can share the controller and URL so we can see what you're doing?
Dave 20 Reputation points

2023-08-21T15:05:02.8666667+00:00

It is not an MVC Application. I have cross-checked the URL; there's nothing wrong there. Building on https, http or IIS Express, I get the same error
AgaveJoe 30,126 Reputation points

2023-08-21T15:24:22.84+00:00

I cannot reproduce this behavior. I created a Razor Page project in VS 2022, clicked run, and the application opened.

Is there anyway you can show us the URL and the Razor Page source?
Dave 20 Reputation points

2023-08-21T15:30:22.58+00:00

Is this what you want me to show?

{ "iisSettings": { "windowsAuthentication": false, "anonymousAuthentication": true, "iisExpress": {"applicationUrl": "http://localhost:53648", "sslPort": 44328 } }, "profiles": { "http": { "commandName": "Project", "dotnetRunMessages": true, "launchBrowser": true, "applicationUrl": "http://localhost:5169", "environmentVariables": {"ASPNETCORE_ENVIRONMENT": "Development" } }, "https": { "commandName": "Project", "dotnetRunMessages": true, "launchBrowser": true, "applicationUrl": "https://localhost:7192;http://localhost:5169", "environmentVariables": { "ASPNETCORE_ENVIRONMENT": "Development" } }, "IIS Express": { "commandName": "IISExpress", "launchBrowser": true, "environmentVariables": {"ASPNETCORE_ENVIRONMENT": "Development" } } } }

@page @model IndexModel @{ ViewData["Title"] = "Home page"; } <div class="text-center"> <h1 class="display-4">Welcome</h1> <p>Learn about <a href="https://docs.microsoft.com/aspnet/core">building Web apps with ASP.NET Core</a>.</p> </div>

Answer 1

Hi @Dave

I create a new Razor page application (using Visual Studio Community 2022 Version 17.6.0) and test your code, everything works fine. So, I suggest you can try to use the following steps:

1.Restart the Visual Studio, and then recreate a new application to test. Whether the new application works well or not?

2.Check the razor page properties, make sure the "Build Action" is "Content". Because, on my side, if I change this property to "None", it will show this page not found error.

User's image

Check the Visual Studio version, try to use Visual Studio Installer upgrade the Visual Studio to the latest version or repair the visual studio.

When using Visual Studio Installer to modify the Visual Studio, please make sure you have installed the "ASP.NET and web development" component and the .Net core related components, you can view the detailed components from the "Individual components".

User's image

Finally, if still not working, try to re-install the Visual Studio.

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Best regards,

Dillion

Dave 20 Reputation points

2023-08-22T14:37:47.4366667+00:00

@Anonymous , I updated my Visual Studio and everything worked fine.

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.NET 7 Core Web App Returns web page not found

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