1.使用visual studio 创建 asp.net core webapi项目

选择启用docker 会生成Dockerfile文件
2.使用efcore连接数据库，安装efcore的包

  <ItemGroup><PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.18.1" /><PackageReference Include="Swashbuckle.AspNetCore" Version="6.2.3" /><PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="6.0.10" /><PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="6.0.0"><PrivateAssets>all</PrivateAssets><IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets></PackageReference></ItemGroup>

3.实体类和数据库对应

using Microsoft.EntityFrameworkCore;
using System.ComponentModel.DataAnnotations;namespace WebApplication4
{public class Inventory{[Key]public int id { get; set; }public string name { get; set; }public int quantity { get; set; }}
}

4.配置数据库连接字符串
//Data Source用的是容器里面的数据库容器名，这里需要容器之间通讯

{"Logging": {"LogLevel": {"Default": "Information","Microsoft.AspNetCore": "Warning"}},"AllowedHosts": "*","ConnectionStrings": {"DefaultConnection": "Data Source=sql-server2022;Database=TestDB;User Id=SA;Password=123456;"}
}

5.创建数据库上下文

using Microsoft.EntityFrameworkCore;namespace WebApplication4
{public class AppDbContext : DbContext{public AppDbContext(DbContextOptions<AppDbContext> options): base(options){}protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder){//optionsBuilder.UseSqlServer("server=localhost,1400;uid=SA;pwd=peng@123;database=TestDB");}public DbSet<Inventory> Inventory { get; set; }}
}

6.业务代码

namespace WebApplication4
{public interface Iservice{void add(Inventory inventory);void remove(int id);List<Inventory> Getlsit();}
}
namespace WebApplication4
{public class service : Iservice{private readonly AppDbContext _context;public service(AppDbContext context){_context = context;}public void add(Inventory inventory){_context.Inventory.Add(inventory);_context.SaveChanges();}public List<Inventory> Getlsit(){return _context.Inventory.ToList();}public void remove(int id){var ENRTY = _context.Inventory.FirstOrDefault(p => p.id == id);_context.Inventory.Remove(ENRTY);_context.SaveChanges();}}
}

7.注入服务

using Microsoft.EntityFrameworkCore;namespace WebApplication4
{public class Program{public static void Main(string[] args){var builder = WebApplication.CreateBuilder(args);// Add services to the container.builder.Services.AddControllers();// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbucklebuilder.Services.AddEndpointsApiExplorer();builder.Services.AddScoped<Iservice, service>();builder.Services.AddDbContext<AppDbContext>(options =>options.UseSqlServer(builder.Configuration.GetConnectionString("DefaultConnection")));builder.Services.AddSwaggerGen();var app = builder.Build();//注释可以在生产环境看到swagger页面// Configure the HTTP request pipeline.//if (app.Environment.IsDevelopment())//{app.UseSwagger();app.UseSwaggerUI();//}app.UseAuthorization();app.MapControllers();app.Run();}}
}

8.contrllor代码

using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;namespace WebApplication4.Controllers
{[Route("api/[controller]")][ApiController]public class InveryController : ControllerBase{private readonly Iservice iservice;public InveryController(Iservice iservice){this.iservice = iservice;}[HttpGet]public IActionResult Getlist(){return new JsonResult(iservice.Getlsit());}[HttpPost]public IActionResult Add([FromBody] Inventory inventory){iservice.add(inventory);return Ok("add success");}[HttpDelete("{id}")]public IActionResult delete(int id){iservice.remove(id);return Ok("remove success");}}
}

9.编写dockerfile文件

根据自己的项目信息更改

#获取asp.net6的镜像
FROM mcr.microsoft.com/dotnet/aspnet:6.0 AS base
#创建工作目录
WORKDIR /app
#复制当前目录到工作目录
ADD . /app
#开放端口
EXPOSE 5999
CMD ["--urls","http://0.0.0.0:5999"]
#设置环境变量
ENTRYPOINT ["dotnet", "WebApplication4.dll"]

10.发布项目

11.切换到发布文件目录 终端打开

12.添加网络（不添加容器间无法通讯）

 docker network create mynetwork#sql-server2022(数据库容器)docker network connect mynetwork   sql-server2022 

13.构建镜像

docker build -t webapplication4 -f ./Dockerfile .

13.运行容器（把容器加到添加的网络里）
-d 后台运行
–name 容器的名字
-p 端口映射
–network 网桥名称
webapplication4 镜像的名称

docker run -d  --name webapiTest -p 5999:5999 --network=mynetwork webapplication4

14.查看运气是否运行

docker ps

15.在浏览器里运行（点击进入浏览器）

在网址里加上 /swagger/index.html

就可以访问数据了。
注意：如果访问的数据库不在docker容器里面就直接写ip地址就行，如果做了端口映射，数据库连接要127.0.0.1,1434 这样的形式。
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