Entity Framework 3 - Migrations

dotnet tool install --global dotnet-ef

dotnet tool install --global dotnet-ef --version 1.2.3

dotnet tool update --global dotnet-ef

1Microsoft Windows [Version 10.0.18363.535]
2(c) 2019 Microsoft Corporation. All rights reserved.
3
4C:\Windows\system32>dotnet tool update --global dotnet-ef
5Tool 'dotnet-ef' was reinstalled with the latest stable version (version '3.1.0').
6
7C:\Windows\system32>

1    public class MigrationEFCoreDbContext : EFCoreDbContext
2    {
3        public MigrationEFCoreDbContext(DbContextOptions<MigrationEFCoreDbContext> options)
4            : base(options)
5        {
6            
7        }
8    }

 1    public class Program
 2    {
 3        public static void Main(string[] args)
 4            => CreateHostBuilder(args).Build().Run();
 5
 6        // EF Core uses this method at design time to access the DbContext
 7        public static IHostBuilder CreateHostBuilder(string[] args) =>
 8            Host.CreateDefaultBuilder(args)
 9                .ConfigureServices((hostContext, services) =>
10                {
11                    services.AddDbContext<MigrationEFCoreDbContext>(o =>
12                        o.UseSqlServer("ConnectionString"));
13                });
14    }

1// creates a new migration with the title "Init"
2dotnet ef migrations add Init

1C:\_s\MyCSharp\MyCSharpNET\src\MyCSharp.Portal.Database> dotnet ef migrations add Init
2Build started...
3Build succeeded.
4info: Microsoft.EntityFrameworkCore.Infrastructure[10403]
5      Entity Framework Core 3.1.0 initialized 'MyCSharpEFCoreMigrationDbContext' using provider 'Microsoft.EntityFrameworkCore.SqlServer' with options: None
6Done. To undo this action, use 'ef migrations remove'

1    Directory: C:\_s\MyCSharp\MyCSharpNET\src\MyCSharp.Portal.Database\Migrations
2
3
4Mode                LastWriteTime         Length Name
5----               -------------        ------ ----
6-a----      24.12.2019     18:59          45422 20191224175935_Init.cs
7-a----      24.12.2019     18:59          46048 20191224175935_Init.Designer.cs
8-a----      24.12.2019     18:59          46010 MigrationEFCoreDbContextModelSnapshot.cs

dotnet ef database update

1dotnet ef database update Init // or
2dotnet ef database update 20191219180921_Init

dotnet ef migrations remove