<五>.netcore webapi连接部署在docker中的mysql

创建一个api，添加引用包

Pomelo.EntityFrameworkCore.MySql
Microsoft.EntityFrameworkCore.Design

创建一个Data文件夹用来存放context，下一级创建一个Entity文件夹用来存放Entity

创建一个UserContext

    public class UserContext:DbContext
    {
        public UserContext(DbContextOptions<UserContext> options):base(options)
        {
        }


        public DbSet<User> Users { get; set; }
    }

创建一个Entity

  public class User
    {
        public int Id { get; set; }
        public string Name { get; set; }
        
        public string Company { get; set; }
        public string Title { get; set; }
    }

startup中引入相关配置

 public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddDbContext<UserContext>(options=>
            {
                options.UseMySql(Configuration.GetConnectionString("MysqlUser"));
            });

            services.AddControllers();
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseHttpsRedirection();

            app.UseRouting();

            app.UseAuthorization();
            InitializeDatabase(app);
            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
            });
        }


        private void InitializeDatabase(IApplicationBuilder app)
        {
            using (var serviceScope = app.ApplicationServices.GetService<IServiceScopeFactory>().CreateScope())
            {
                var context = serviceScope.ServiceProvider.GetRequiredService<UserContext>();
                context.Database.Migrate();
                if (!context.Users.Any())
                {
                    context.Users.Add(new Data.Entity.User() { Id = 1, Name = "test" });
                    context.SaveChanges();
                }
            }
        }
    }

appsetting中添加配置

 "ConnectionStrings": {
    "MysqlUser": "server=127.0.0.1;port=3306;database=DockerTest;userid=sa2;password=123456"
  }

执行codefirst命令

Add-Migration init
Update-Database

运行一下程序，查看下数据库