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Aug 08, 2017.NET Core 2.0 Installer Should Check the OSX version before continuing with the installation #8590 Raviuppa opened this issue Aug 8, 2017 4 comments Milestone. Official.NET Core downloads for Linux, macOS, and Windows.NET Core is a cross-platform version of.NET, for building apps that run on Linux, macOS, and Windows. This site uses cookies for analytics, personalized content and ads. Visual Studio Mac incompatible with dotnet core 2. Ask Question Asked 2 years, 6 months ago. I've also downloaded and installed.NET Core 2.0 Preview 1. From a shell prompt I can generate a new Web API project. Browse other questions tagged macos.net-core visual-studio-mac asp.net-core-2.0 or ask your own question. .NET Core 2.0 is now available for developers as a final release. Developers can start developing with it at the command line, in a favorite text/code editor such as Visual Studio 2017 15.3, Visual Studio Code or Visual Studio for Mac. Microsoft is also releasing ASP.NET Core 2.0 and Entity Framework Core 2.0. Read the ASP.NET. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question.Provide details and share your research! Asking for help, clarification,.

Visual Studio for Mac makes it easy to develop your app’s service with its support for the latest ASP.NET Core Web development platform. ASP.NET Core runs on .NET Core, the latest evolution of the .NET Framework and runtime. It’s been tuned for fast performance, factored for small install sizes, and reimagined to run on Linux and macOS, as well as Windows.

Installing .NET Core

.NET Core 2.1 is automatically installed when you install Visual Studio for Mac.

Creating an ASP.NET Core app in Visual Studio for Mac

Open Visual Studio for Mac. On the Start Screen, select New Project..

This will display the New Project dialog, allowing you to select a template to create your application.

There are a number of projects that will provide you with a pre-built template to start building your ASP.NET Core Application. These are:

• .NET Core > Empty
• .NET Core > API
• .NET Core > Web Application
• .NET Core > Web Application (Model-View-Controller)

Select the ASP.NET Core Empty Web Application and press Next. Give the Project a Name and press Create. This creates a new ASP.NET Core app. In the solution pad's left pane, expand the second arrow and then select Startup.cs. It should look similar to the image below:

The ASP.NET Core Empty template creates a web application with two default files: Program.cs and Startup.cs, which are explained below. It also creates a Dependencies folder, which contains your project’s NuGet package dependencies such as ASP.NET Core, the .NET Core framework, and the MSBuild targets that build the project:

Program.cs

This topic describes how to find, view, and download.NET Core, ASP.NET Core, and C# samples and tutorials. Find resources to learn the F# programming language on the F# Foundation's site. Getting started with.NET Core on macOS using Visual Studio for Mac. Dec 19, 2019 Tutorial: Create a.NET Core solution in macOS using Visual Studio Code.; 6 minutes to read +14; In this article. This document provides the steps and workflow to create a.NET Core solution for macOS. Learn how to create projects, unit tests, use the debugging tools, and incorporate third-party libraries via NuGet.

Open and inspect the Program.cs file in your project. Notice that several things are happening in the Main method – the entry into your app:

An ASP.NET Core app creates a web server in its main method by configuring and launching a host via an instance of WebHostBuilder. This builder provides methods to allow the host to be configured. In the template app the following configurations are used:

• .UseStartup<Startup>(): Specifies the Startup class.

However, you can also add additional configurations, such as:

• UseKestrel: Specifies the Kestrel server will be used by the app
• UseContentRoot(Directory.GetCurrentDirectory()): Uses the web project's root folder as the app's content root when the app is started from this folder
• .UseIISIntegration(): Specifies that the app should work with IIS. To use IIS with ASP.NET Core both UseKestrel and UseIISIntegration need to be specified.

Startup.cs

The Startup class for your app is specified in the UseStartup() method on the CreateWebHostBuilder. It is in this class that you will specify the request handling pipeline, and where you configure any services.

Open and inspect the Startup.cs file in your project:

This Startup class must always adhere to the following rules:

• It must always be public
• It must contain the two public methods: ConfigureServices and Configure

The ConfigureServices method defines the services that will be used by your app.

The Configure allows you to compose your request pipeline using Middleware. These are components used within an ASP.NET application pipeline to handle requests and responses. The HTTP pipeline consists of a number of request delegates, called in sequence. Each delegate can choose to either handle the request itself, or pass it to the next delegate.

You can configure delegates by using the Run,Map, and Use methods on IApplicationBuilder, but the Run method will never call a next delegate and should always be used at the end of your pipeline.

The Configure method of the pre-built template is built to do a few things. First, it configures an exception handling page for use during development. Then, it sends a response to the requesting web page with a simple 'Hello World'.

This simple Hello, World project can run now without any additional code being added. To run the app, you can either select which browser you want to run app the app in using the dropdown right of the Play button, or simply hit the Play (triangular) button to use your default browser:

Visual Studio for Mac uses a random port to launch your web project. To find out what port this is, open the Application Output, which is listed under View > Pads. You should find output similar to that shown below:

Once the project is running, your default web browser should launch and connect to the URL listed in the Application Output. Alternatively, you can open any browser of your choice, and enter http://localhost:5000/, replacing the 5000 with the port that Visual Studio output in the Application Output. You should see the text Hello World!:

Adding a Controller

ASP.NET Core Apps use the Model-View-Controller (MVC) design pattern to provide a logical separation of responsibilities for each part of the app. MVC consists of the following:

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• Model: A class that represents the data of the app.
• View: Displays the app's user interface (which is often the model data).
• Controller: A class which handles browser requests, responds to user input and interaction.

For more information on using MVC refer to Overview of ASP.NET Core MVC guide.

To add a controller, do the following:

1. Right-click on the Project name and select Add > New Files. Select General > Empty Class, and enter a controller name:

2. Add the following code to the new controller:

3. Add the Microsoft.AspNetCore.Mvc dependency to the project by right-clicking the Dependency folder, and selecting Add Package...

4. Use the Search box to browse the NuGet library for Microsoft.AspNetCore.Mvc, and select Add Package. This may take a few minutes to install and you may be prompted to accept various licenses for the required dependencies:

5. In the Startup class, remove the app.Run lambda and set the URL routing logic used by MVC to determine which code it should invoke to the following:

   Make sure to remove the app.Run lambda, as this will override the routing logic.

   MVC uses the following format, to determine which code to run:

   /[Controller]/[ActionName]/[Parameters]

   When you add the code snippet above, you are telling the app to default to the HelloWorld Controller, and the Index action method.

6. Add the services.AddMvc(); call to the ConfigureServices method, as illustrated below:

   You can also pass parameter information from the URL to the controller.

7. Add another method to your HelloWorldController, as illustrated below:

8. If you run the app now, it should automatically open your browser:

9. Try to browse to http://localhost:xxxx/HelloWorld/Xamarin?name=Amy (replacing xxxx with the correct port), you should see the following:

Troubleshooting

If you need to install .NET Core manually on Mac OS 10.12 (Sierra) and higher, do the following:

1. Before you start installing .NET Core, ensure that you have updated all OS updates to the latest stable version. You can check this by going to the App Store application, and selecting the Updates tab.

2. Follow the steps listed on the .NET Core site.

Make sure to complete all steps successfully to ensure that .NET Core is installed successfully.

Summary

This guide gave an introduction to ASP.NET Core. It describes what it is, when to use it, and provided information on using it in Visual Studio for Mac.For more information on the next steps from here, refer to the following guides:

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• ASP.NET Core docs.
• Creating Backend Services for Native Mobile Applications, which shows how to build a REST service using ASP.NET Core for a Xamarin.Forms app.
• ASP.NET Core hands-on lab.

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Prerequisites

• EF Core is a .NET Standard 2.1 library. So EF Core requires a .NET implementation that supports .NET Standard 2.1 to run. EF Core can also be referenced by other .NET Standard 2.1 libraries.

• For example, you can use EF Core to develop apps that target .NET Core. Building .NET Core apps requires the .NET Core SDK. Optionally, you can also use a development environment like Visual Studio, Visual Studio for Mac, or Visual Studio Code. For more information, check Getting Started with .NET Core.

• You can use EF Core to develop applications on Windows using Visual Studio. The latest version of Visual Studio is recommended.

• EF Core can run on other .NET implementations like Xamarin and .NET Native. But in practice those implementations have runtime limitations that may affect how well EF Core works on your app. For more information, see .NET implementations supported by EF Core.

• Finally, different database providers may require specific database engine versions, .NET implementations, or operating systems. Make sure an EF Core database provider is available that supports the right environment for your application.

Get the Entity Framework Core runtime

To add EF Core to an application, install the NuGet package for the database provider you want to use.

If you're building an ASP.NET Core application, you don't need to install the in-memory and SQL Server providers. Those providers are included in current versions of ASP.NET Core, alongside the EF Core runtime.

To install or update NuGet packages, you can use the .NET Core command-line interface (CLI), the Visual Studio Package Manager Dialog, or the Visual Studio Package Manager Console.

.NET Core CLI

• Use the following .NET Core CLI command from the operating system's command line to install or update the EF Core SQL Server provider:

• You can indicate a specific version in the dotnet add package command, using the -v modifier. For example, to install EF Core 2.2.0 packages, append -v 2.2.0 to the command.

For more information, see .NET command-line interface (CLI) tools.

Visual Studio NuGet Package Manager Dialog

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• From the Visual Studio menu, select Project > Manage NuGet Packages

• Click on the Browse or the Updates tab

• To install or update the SQL Server provider, select the Microsoft.EntityFrameworkCore.SqlServer package, and confirm.

For more information, see NuGet Package Manager Dialog.

Visual Studio NuGet Package Manager Console

• From the Visual Studio menu, select Tools > NuGet Package Manager > Package Manager Console

• To install the SQL Server provider, run the following command in the Package Manager Console:

• To update the provider, use the Update-Package command.

• To specify a specific version, use the -Version modifier. For example, to install EF Core 2.2.0 packages, append -Version 2.2.0 to the commands

For more information, see Package Manager Console.

Get the Entity Framework Core tools

You can install tools to carry out EF Core-related tasks in your project, like creating and applying database migrations, or creating an EF Core model based on an existing database.

Two sets of tools are available:

• The .NET Core command-line interface (CLI) tools can be used on Windows, Linux, or macOS. These commands begin with dotnet ef.

• The Package Manager Console (PMC) tools run in Visual Studio on Windows. These commands start with a verb, for example Add-Migration, Update-Database.

Although you can also use the dotnet ef commands from the Package Manager Console, it's recommended to use the Package Manager Console tools when you're using Visual Studio:

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• They automatically work with the current project selected in the PMC in Visual Studio, without requiring manually switching directories.

• They automatically open files generated by the commands in Visual Studio after the command is completed. Free app for mac.

Get the .NET Core CLI tools

.NET Core CLI tools require the .NET Core SDK, mentioned earlier in Prerequisites.

The dotnet ef commands are included in current versions of the .NET Core SDK, but to enable the commands on a specific project, you have to install the Microsoft.EntityFrameworkCore.Design package:

Important

Always use the version of the tools package that matches the major version of the runtime packages.

Get the Package Manager Console tools

To get the Package Manager Console tools for EF Core, install the Microsoft.EntityFrameworkCore.Tools package. For example, from Visual Studio:

For ASP.NET Core apps, this package is included automatically.

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Upgrading to the latest EF Core

• Any time we release a new version of EF Core, we also release a new version of the providers that are part of the EF Core project, like Microsoft.EntityFrameworkCore.SqlServer, Microsoft.EntityFrameworkCore.Sqlite, and Microsoft.EntityFrameworkCore.InMemory. You can just upgrade to the new version of the provider to get all the improvements.

• EF Core, together with the SQL Server and the in-memory providers are included in current versions of ASP.NET Core. To upgrade an existing ASP.NET Core application to a newer version of EF Core, always upgrade the version of ASP.NET Core.

• If you need to update an application that is using a third-party database provider, always check for an update of the provider that is compatible with the version of EF Core you want to use. For example, database providers for previous versions are not compatible with version 2.0 of the EF Core runtime.

• Third-party providers for EF Core usually don't release patch versions alongside the EF Core runtime. To upgrade an application that uses a third-party provider to a patch version of EF Core, you may need to add a direct reference to individual EF Core runtime components, such as Microsoft.EntityFrameworkCore, and Microsoft.EntityFrameworkCore.Relational.

• If you're upgrading an existing application to the latest version of EF Core, some references to older EF Core packages may need to be removed manually:

  • Database provider design-time packages such as Microsoft.EntityFrameworkCore.SqlServer.Design are no longer required or supported from EF Core 2.0 and later, but aren't automatically removed when upgrading the other packages.

  • The .NET CLI tools are included in the .NET SDK since version 2.1, so the reference to that package can be removed from the project file: