Tagged with .net core
[UPDATE] After reviewing some of the code and talking with commenters, I agree that using HostServices for console apps is a bad idea. I've refactored this to use the host but not the HostService. I believe that the entire host is still useful for configuration, logging, and DI. See below for the latest changes:
I was at a customer site last week and a lot of their integration code is a set of console apps that are run on timers to import and export data. This isn't an uncommon use-case.
I've got a couple of these lying around myself. I realized that I didn't know of a good exemplar of doing simple console apps using .NET Core in a way that is closer to ASP.NET Core (e.g. dependency injection, lifetime management, cancellation, etc.). So I decided to re-write an old console app I have.
They finally posted the video, so if you want to see the talk, here is your chance:
As promised, here are links to the code and slides from the talk:
ASP.NET Core 3 seems to be taking a similar tact to version 1 as it is adding a lot of functionality and phasing it in with different previews. While a lot of the articles seem to be focusing on the non-ASP.NET features (e.g. WPF, WinForms, etc.), I thought it would be nice to let those of you who are ASP.NET devs know what is in Preview 6 just for you.
It feels a lot like the ASP.NET MVC/API side is being treated as mature and stable as there is are not a lot of surface changes. Microsoft does seem to be doubling down on Razor Pages and Blazor. It feels like they want .NET Core to be a good fit for different styles and backgrounds of developer. This release is no different.
Let's take a look at the details:
I've had a great time this week attending two events and talking about things I love: .NET and Vue.
Was a busy week, but really had fun time presenting again. Lots of great questions!
Earlier in the week I had the pleasure of speaking at DotNetSouth, a new event by the people who brought you Connect.Tech. They run a great show. I talked about .NET 3 (and 5) as well as Vue.js. Here are the slides and code:
As many of my readers already know, I've become enamoured with Vue.js. Because of this, I've been using it more and more on projects.
I'm going to assume you have used the Vue CLI and ASP.NET Core before. So I'm skipping a lot of steps like creating the ASP.NET Core project. I'm also going to assume you've opened up a console before and ran commands. Lastly, I'm assuming you're using Visual Studio (though shouldn't be much different if you're not), and that you have the Vue CLI installed.
If you didn't notice, Entity Framework Core 2.1 has a new way to support seeding your databases with a method called HasData. Julie Lerman has a great new Data Points column in MSDN that explains how a lot of it works.
Go read that article first. It really covers the basics. Unfortunately, for my use, her article missed a tiny detail that I think is useful. But let's start with a brief overview of how HasData works.
In Entity Framework before .NET Core, entity framework had a way to create seed data but that method had a number of issues so they decided not to bring it over to Entity Framework Core. Now that we're into version 2.1 of Entity Framework Core, they wanted to allow for a way to seed the data with certain types of data.