.net Core 2.0 and SQL via EF Core 2.0
So I can never remember the order that these goes in so Here we go:
A console App with .net Core/SQL Server/EF Core 2.0
– In VS 2017 – Create a in .Net Core a Console App (.NET CORE)
-Package Manager Console:
Now let’s say we have a database and table…. Let’s reverse engineer it!
Scaffold-DbContext “<that magic connect string>” Microsoft.EntityFrameworkCore.SqlServer -OutputDir Models
This is command that will use the <that magic connect string> and the provider Microsoft.EntityFrameworkCore.SqlServer with the code generation going into the Models sub-directory.
Examples <that magic connect string>
For local DB and table: “Server=(localdb)\mssqllocaldb;Database=Blogging;Trusted_Connection=True;”
For a real SQL Server connection instance:
Scaffold-DbContext "Server=Orion;DataBase=Blogging;Integrated Security=False;
User ID=sa;Password=****;Connect Timeout=30;Encrypt=False;TrustServerCertificate=True;
ApplicationIntent=ReadWrite;MultiSubnetFailover=False"
Microsoft.EntityFrameworkCore.SqlServer -OutputDir Models
Also add the table parameter to get only certain tables -table Blogs, Post
So that was the Hard part… now some sample code:
Make sure you add using Microsoft.EntityFrameworkCore; And if you put the dbContext into it’s own folder, make sure you include the class namespace.
using System;
using Microsoft.EntityFrameworkCore;
using conAppSqlCore.Models;
namespace conAppSqlCore
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
using (var db = new BloggingContext())
{
foreach (var blog in db.Blog)
{
Console.WriteLine($"Name URL - {blog.Url}");
}
}
Console.ReadLine();
}
}
}