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I attempt to lunch my ASP.NET Core project in Microsoft Visual Studio 2019 and got this error: "Unable to connect to web server 'IIS Express'"

• Visual Studio 2019 Version 16.9.5
• .Net 5.0

I am migrating my existing ASP.Net 5 web app to ASP.Net 6 and bump into the final hurdles of getting the integration tests to pass.

I customize WebApplicationFactory and it throws exception: Changing the host configuration using WebApplicationBuilder.WebHost is not supported. Use WebApplication.CreateBuilder(WebApplicationOptions) instead.

I got up and running with Visual Studio 2022 Preview for a couple of days now.

Got the first shock, there is no Startup.cs. Thats ok, a bit of reading, I know Startup is removed.

Today got another slap. I see no using statements. Here it is.

I just created a brand new .NET 6 web app and as I hover over the WebApplication class, I realized it stays in Microsoft.AspNetCore.Builder namespace. And the generated Program.cs class looks like this.

So where is the using Microsoft.AspNetCore.Builder; statement?

Whats the magic? Why is .net becoming mystical by the day?

The full Program.cs file is as follows.

I am working through the Microsoft Learn tutorials to "Create a web API with ASP.Net Core".

Under the heading, "Build and test the web API", at instruction (5) I am getting a response, "Unable to find an OpenAPI description".

For step (6) when executing the "ls" command I get the response, "No directory structure has been set, so there is nothing to list. Use the 'connect' command to set a directory structure based on an OpenAPI description". I have tried the "connect" command suggested here and have tried "dir" as an alternative to "ls".

I can successfully change directories in step (7) and execute the GET request for step (8) and receive the expected reply. However, it really bothers me the "ls" command is not working here and seems like an important function of the httprepl tool.

How can I get the "ls" command to work here or tell me why does it not work?

I'm using Asp.Net Core Web Api 6

I'm facing an error when migrating my DbContext and when updating the database

The Error

My new Macbook Pro running on an M1 Max (ARM) chip just came in. I installed Parallels and Windows 11 Preview for ARM, and Visual Studio installs / launches / builds my solution beautifully. Unfortunately the turn windows features on or off dialog doesn't have the option for installing IIS, and others have posted that this is not supported in Windows 11 for ARM.

Our dev team runs multiple ASP.NET Core 3.1 websites locally under IIS using subdomains, e.g.: https://auth-dev.mydomain.com, https://web-dev.mydomain.com, https://webapi-dev.mydomain.com. This was easy to set up in IIS using the bindings dialog, I could specify for port 443 (https) to use a certain subdomain and our dev SSL certificate.

Now I need to figure out how to make this work on Windows 11 ARM. Developing on an inferior non-Macbook Pro laptop doesn't seem like a great solution for .NET devs, I have to assume others with M1 chip Macbook Pros have run into this same issue. What are my options?

I first started looking into using IIS Express, but it seems like every website has to run on a different port, whereas I need them all to run on port 80 (just with different subdomains.) I'd be fine with them running on different ports if there was a way to forward those various ports to the subdomains, but it doesn't seem like the windows HOSTS file supports that.

I also looked into using the Apache web server for Windows, but I read somewhere that it doesn't support running ASP.NET Core apps.

I'm trying to access appsettings.json in my Asp.net core v6 application Program.cs file, but in this version of .Net the Startup class and Program class are merged together and the using and another statements are simplified and removed from Program.cs. In this situation, How to access IConfiguration or how to use dependency injection for example ?

Edited : Here is my default Program.cs that Asp.net 6 created for me

As of .NET 6 in ASP.NET API, if you want to get DateOnly (or TimeOnly) as query parameter, you need to separately specify all it's fields instead of just providing a string ("2021-09-14", or "10:54:53" for TimeOnly) like you can for DateTime.

I was able to fix that if they are part of the body by adding adding custom JSON converter (AddJsonOptions(o => o.JsonSerializerOptions.Converters.Add(...))), but it doesn't work for query parameters.

I know that could be fixed with model binder, but I don't want to create a model binder for every model that contains DateOnly/TimeOnly. Is there a way to fix this application wide?

Demo:

Lets assume you have a folowwing action:

[HttpGet] public void Foo([FromQuery] DateOnly date, [FromQuery] TimeOnly time, [FromQuery] DateTime dateTime)

Here's how it would be represented in Swagger:

I want it represented as three string fields: one for DateOnly, one for TimeOnly and one for DateTime (this one is already present).

PS: It's not a Swagger problem, it's ASP.NET one. If I try to pass ?date=2021-09-14 manually, ASP.NET wouldn't understand it.

Constructor injection of a logger into Startup works in earlier versions of ASP.NET Core because a separate DI container is created for the Web Host. As of now only one container is created for Generic Host, see the breaking change announcement.

Startup.cs