How to install EF Core into VS Code?

How can I install and use Entity Framework Core in Visual Studio Code?

VS Code is just an editor. It doesn't install EF (or any packages). You can install EF by editing your csproj file to contain this set of lines....<ItemGroup> <PackageGroup Include="Microsoft.EntityFrameworkCore.SqlServer" Version="1.1.0" /> </ItemGroup> ...VS Code may give you a prompt to "restore" pacakges. If not, call ...dotnet restore... on...

Trying to install EF Core with Portable Class Library targeting .Net 4.6.1

I don't know how this will work for your Portable Class needs, but for regular .NET (4.6 or etc), I discovered the following. (see rant below)...So I don't know if this is 'kosher' or not, but this source works right now: ...Add nuget package source (Options - Package Sources - Add (plus) ...Name: 'aspnetrelease' (or whatever you want)...Source: '....

EntityState.Modified does work differently on updating in EF Core vs EF 6

Your error is stating that your Student has SchoolclassId and that value does not exist in the foreign table which is Id in Schoolclasses table....Check the value of SchoolclassId before calling SaveChanges. Most likely this value does not exist in Schoolclasses table....In other words this error is not because of EF 6 vs EF 7 but due to a foreign ...

SQL Difference EF 6 vs EF Core

(To turn my comments into an answer)...This is an interesting example of how a seemingly innocent change in implementation may have unexpected side effects....EF6 filters the join at the right-hand side of the join:...SELECT d.* FROM Deputy d LEFT OUTER JOIN User u ON d.UserId = u.Id WHERE u.Id IS ...

Entity Framework Core 2.2.3 not creating table using code-first approach vs 2017

Thanks to @er-sho, i managed to generate database using code first approach. Following things helped me:...Go to Tools => Nuget Package Manager => Package Manager Console....For creating db migration code...dotnet ef migrations add CreateDatabase --output-dir Data/Migrations...Execute migration code:...dotnet ef database update

What is the difference between EF Core Database-First and EF Core Code-First approaches?

Database-First...DB-First is that you reverse engineer an existing database to create an Entity Framework model.Instead of designing the EDMX manually and generating the SQL script to create the Database, we build the latter and then generate the former using the Entity Framework Designer tool....Code-First...Code-First uses migrations to create th...

How to install entity framework core to asp.net core 3 project using visual studio code

ASP.NET Core 3.0 removes some assemblies that were previously part of the ...Microsoft.AspNetCore.App... package reference....You should add the package references for removed assemblies....In XML project file:...<Project Sdk="Microsoft.NET.Sdk.Web"> <PropertyGroup> <TargetFramework>netcoreapp3.0</TargetFramework> <UserSecretsId>My-secre...

Where to put Mapster mapping code in EF Core 3 and ASP.Net MVC Core?

In asp.net core, you could put your mapping code in startup ...Configure... method...public void Configure(IApplicationBuilder app, IHostingEnvironment env) { if (env.IsDevelopment()) { app.UseDeveloperExceptionPage(); } TypeAdapterConfig<Employee, EmployeeViewModel>.NewConfig() ...

Entity Framework .Net Core 3.1 - Code First vs Scaffolding

1) No comment as I never use it....2) Database-First approach is the most effective to do. Save alot of your time. Yes, design tables in SQL Server, then run Scaffold-DbContext.

EF Core migration error with .NET Core Web API in Visual Studio Code

Thank you @sea_ocean ... You have to specify the startup project:...dotnet ef migrations add MigrationOne --startup-project ../Sample.API/Sample.API.csproj ...and then...dotnet ef database update --startup-project ../Sample.API/Sample.API.csproj ...You also need to install Microsoft.EntityFrameworkCore.Design to the startup project