EF core in ASP Generate core priority database based on net entity model

Test environment ：

1、vs2019 Community Edition

2、EF CORE 3.1.6

3、ASP.NET CORE 3.1

First we use VS Create a new one ASP.NET CORE Project , And then create a new one .Net Core Class library of . Because in most cases , We all need to put the operation of the database into a class library , Avoid putting all business logic in web In the project . Here's one thing to pay attention to , This class library must be .NET Core Class library of , It can't be .NET Standard Class library of , Otherwise, the following error will be reported ：

  After the class library is built , Set this class library as the startup project . And then use NuGet Add the following assemblies to the package ：

After the assembly is added , Open the package management console , There is a drop-down option for the default item on the top of the console , Set the default project to the current class library . Enter the following command ：

Scaffold-DbContext " Your database connection string " Microsoft.EntityFrameworkCore.SqlServer -OutputDir Models

If it works , A new one will be added under the root directory of your class library Models Folder , The file under this folder is the entity model of all database tables , Pictured ：