efCore+Mysql8，使用及表的迁移

以明志、2024-08-16 12:17

1.安装 Nuget 包

Microsoft.EntityFrameworkCore > Microsoft.EntityFrameworkCore.Tools > Pomelo.EntityFrameworkCore.MySql

2.MVC 框架搭出来

models

cs 复制代码

using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace ShuYiTest.Models;
[Table("User")]
public class UserInfo
{
    [Key]
    public string ID { get; set; }
    public string UserName { get; set; }

    public string Password { get; set; }

    public string PhoneNumber { get; set; }

}

Controller

cs 复制代码

using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using ShuYiTest.helper;
using ShuYiTest.Models;

namespace ShuYiTest.Controller
{

    [Route("[controller]/[action]")]
    [ApiController]
    public class UserController : ControllerBase
    {
        [HttpPost]
        public IActionResult GetUser(UserInfo user)
        {

            Console.WriteLine("Success");
        }
    }
}

3.创建 DbContext 类

cs 复制代码

using Microsoft.EntityFrameworkCore;
using ShuYiTest.Models;

namespace ShuYiTest.helper;

public class EFContext:DbContext
{

    public EFContext()
    {

    }

    public DbSet<UserInfo> Persons { get; set; }

    IConfiguration configuration = new ConfigurationBuilder()
            .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
            .Build();

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        optionsBuilder.UseMySql(configuration["ConnectionStrings:MysqlConnection"],new MySqlServerVersion(new Version(8,0,37)));
    }
}

4.appsettings.json 中配置连接字段

json 复制代码

"ConnectionStrings": {
    "MysqlConnection": "server=localhost;port=3306;user=czm;password=Chenzhiming11.27;database=test"
  },

5.使用 ef 进行表的迁移

1.dotnet ef migrations add InitialCreate//创建迁移

2.dotnet ef database update//应用迁移

3.dotnet ef migrations list//查看迁移历史

6.efCore 的使用

https://learn.microsoft.com/zh-cn/ef/core