一、创建一个DataContext普通类继承DbContext
二、配置连接字符串(MySql/SqlServer都可以)
using Microsoft.EntityFrameworkCore;using System;using System.Collections.Generic;using System.Linq;using System.Threading.Tasks;namespace DotNetCore.Models{ public class DataContext:DbContext { protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) { //配置MySql连接字符串/SqlServer连接字符串皆可 optionsBuilder.UseMySql("Server=47.94.174.85;Database=testDb; User=testDb;Password=testDb;"); } public class t_testModel { public int id { get; set; } public string name { get; set; } public string pass { get; set; } } //添加表实体 public DbSet<t_testModel> friends { get; set; } }}
三、在控制器里面写查询操作
DataContext context = new DataContext(); List<t_testModel> list = context.friends.ToList(); return Content(list.ToString());
四、数据库表对应的结构
DROP TABLE IF EXISTS `friends`;CREATE TABLE `friends` ( `id` int(3) NOT NULL, `name` varchar(8) NOT NULL, `pass` varchar(20) NOT NULL) ENGINE=InnoDB DEFAULT CHARSET=utf8; INSERT INTO `friends` VALUES (‘4‘, ‘王六‘, ‘dasd‘);
总结所作的操作
1、创建DataContext类继承DbContext(一个类文件)
2、控制器里面写查询操作