.net core webapi+EF Core

.net core webapi+EF Core

一.描述:

EF Core必须下载.net core2.0版本

Micorsoft.EntityFrameworkCore:EF框架的核心包
Micorsoft.EntityFrameworkCore.SqlServer:针对SqlServer数据库的扩展,使用SqlServer数据库必须。类似的还有MySql,SqlLite等
Micorsoft.EntityFrameworkCore.Tools
Micorosft.EntityFrameworkCore.Design:用户根据现有的数据库生成模型代码
Microsoft.EntityFrameworkCore.SqlServer.Design

二.EF安装:

通过nuget方式:

1.EF核心库安装:

Install-package Microsoft.EntityFrameworkCore
Install-package Microsoft.EntityFrameworkCore.SqlServer
2.dbfirst需要的库:
Install-package Microsoft.EntityFrameworkCore.Design
Install-package Microsoft.EntityFrameworkCore.Tools
Install-package Microsoft.EntityFrameworkCore.SqlServer.Design


三.使用dbfirst方式生成实体及上下文对象:

Scaffold-DbContext "Server=.;database=CommonPermission;User ID=sa;Password=123;" Microsoft.EntityFrameworkCore.SqlServer -OutputDir Models

四.配置:

通过上面的生成方式数据库配置直接在代码中,这种做法是不好的,应该移动到配置文件中:

上下文类屏蔽数据库连接:

 protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            if (!optionsBuilder.IsConfigured)
            {
#warning To protect potentially sensitive information in your connection string, you should move it out of source code. See http://go.microsoft.com/fwlink/?LinkId=723263 for guidance on storing connection strings.
                //optionsBuilder.UseSqlServer("Server=.;database=CommonPermission;User ID=sa;Password=123;");
            }
        }

 


在appsettings.json文件中配置:

{
  "Logging": {
    "LogLevel": {
      "Default": "Warning"
    }
  },
  "ConnectionStrings": {
    "SQLConnection": "Server=.;database=CommonPermission;User ID=sa;Password=123;"
  },
  "AllowedHosts": "*"
}

 

在Startup.cs文件中的ConfigureServices方法中注入上下文对象:

 //注入上下文对象
            services.AddDbContext<CommonPermissionContext>(x => x.UseSqlServer(Configuration.GetConnectionString("SQLConnection")));
            

 

接下来的和net framework中的ef方式一致!

 


 

posted @ 2019-04-18 23:50  土豆哥  阅读(2179)  评论(0编辑  收藏  举报