Saturday, October 28, 2017

ASP.NET Core, Entity Framework Build anywhere


A while ago ASP.NET Core came (the latest version is 2.0.2) and has a completely disjoint architecture that allows integration of components as needed by the application. It is much more lightweight than its predecessor, and enables easy-to-use data access for ASP.NET Core. You can build asp.net applications on a mac or Linux. Asp.net core supports Self-contained deployment; this means the whole core framework can be a part of the deployment package. This enables deploying only any machine. For a complete list of runtime identifiers can be found here.
                The new Core framework runs on any machine, is Open-source and community-focused and can be built on the cloud, one more less important thing is, complex apps do not need Visual Studio and can be developed with any free IDE and CLI. Also there is ability to host on IIS or self-host in your own process.
Entity Framework (EF) Core is a lightweight, extensible, and cross-platform version of the popular Entity Framework data access technology. Read more about Entity Framwork Core. EF core can run with a number of databases, it also supports NoSql Databases. See the EF Core Roadmap. CosmosDb provider will come out soon, and databases line mongodb and ravendb  will be supported in the near future.
                But there are some other providers for entity framework. For example to use mongodb with EF core you can use https://github.com/crhairr/EntityFrameworkCore.MongoDb . EFCore-MongoDb wraps the MongoDb C# Driver and supports the driver's attributes and conventions.
Before going ahead, ask the question-> how does this help? Core is the next .NET Framework, there’s no seamless transition to the new ASP.NET version, and there has been a change in the whole architecture of how .NET applications are built. Most importantly ASP.NET Core is free and open source. This means that there is no need to buy enterprise Visual Studio license, this lessens the development cost and EF Core eliminates the need for most of the data-access code that developers usually need to write. The other notable difference is that development or deployment of ASP.NET Core applications can be done on any Operating system or Cloud.
EF core allows a set of database providers such as MS Sql,  Oracle, Postgres etc. to be configured.
 
Individual database support is often handled by a different set of classes that are imported only when needed.
Lets get some code running.
Create a console app from core:
        In the below example Ive used dotnet core 2.0.0 sdk that can be downloaded from here and vscode as the IDE that can be downloaded from here by selecting your OS and System. Note that VS code is a good option for ASP.NET Core; Other Editors such as Sublime Brackets or any other editor including Visual Studio 2017 (only 2017 supports Core) can be used.
Make sure you have installed dotnet core sdk. To check open command line and
Create a directory and navigate into it
To create a new mvc project use the new command with the mvc option. A new mvc project is created in the folder and the dependencies are restored.
To run this project just type dotnet run, this will start the application
On navigating to http://localhost:5000 you should see the new mvc site.
Make sure Visual Studio code is installed. Install VScode from here
Open the project just created using VS code by typing ‘ code .’
You should have VS Code opened the project
Next install the C# Extension
This will allow you to have intellisence within a c# file.
Another extension is needed to install nuget packages