asp.net core webapi 使用ef 對mysql進行增刪改查，並生成Docker鏡像構建容器運行

1.構建運行mysql容器，添加資料庫user

參考Docker創建運行多個mysql容器，地址 http://www.cnblogs.com/heyangyi/p/9288402.html

添加user資料庫，添加tbusers表

2.創建asp.net core webapi 應用程式

參考Docker 為 ASP.NET Core WebApi 應用程式生成 Docker 映像，創建容器並運行,地址 http://www.cnblogs.com/heyangyi/p/9323407.html

<2.1> 修改 appsettings.json  文件,添加 dbconn 資料庫鏈接配置

<2.2> 新增Config類，用來存儲配置

    public class Config
    {
        public static string dbconn;
    }

<2.3> 修改Program 類，讀取配置

    public class Program
    {
        private static IConfigurationRoot Configuration { get; set; }

        public static void Main(string[] args)
        {
            var builder = new ConfigurationBuilder()
             .SetBasePath(Directory.GetCurrentDirectory())
             .AddJsonFile("appsettings.json");

            Configuration = builder.Build();
            Config.dbconn = Configuration.GetValue<string>("dbconn");

            BuildWebHost(args).Run();
        }

        public static IWebHost BuildWebHost(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
                .UseStartup<Startup>()
                .Build();
    }

<2.4> 新增DataContext類

安裝引用：MySql.Data.EntityFrameworkCore

    public class DataContext : DbContext
    {
        public DbSet<tbuser> tbusers { get; set; }

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) => optionsBuilder.UseMySQL(Config.dbconn);
    }

    public class tbuser
    {
        [DatabaseGenerated(DatabaseGeneratedOption.None)]
        public int id { get; set; }
        public string nickName { get; set; }
        public string email { get; set; }
    }

<2.5> 新增tbuserDataHandle類

    public class tbuserDataHandle : DataContext
    {
        public static int adduser(tbuser user)
        {
            try
            {
                using (var context = new DataContext())
                {
                    context.Database.EnsureCreated();
                    context.Add(user);

                    context.SaveChanges();
                }
                return 200;
            }
            catch (Exception ex)
            {
                return 300;
            }
        }

        public static List<tbuser> Get()
        {
            try
            {
                using (var context = new DataContext())
                {
                    var users = context.tbusers;
                    List<tbuser> items = new List<tbuser>();
                    foreach (var item in users)
                    {
                        items.Add(item);
                    }
                    return items;
                }
            }
            catch (Exception ex)
            {
                return null;
            }
        }

        public static tbuser Get(int id)
        {
            try
            {
                using (var context = new DataContext())
                {
                    var u = context.tbusers.Find(id);
                    return u;
                }
            }
            catch (Exception ex)
            {
                return null;
            }
        }

        public static int Delete(int id)
        {
            try
            {
                using (var context = new DataContext())
                {
                    var u = context.tbusers.Remove(new tbuser() { id = id });
                    context.SaveChanges();
                    return 200;
                }
            }
            catch (Exception ex)
            {
                return 300;
            }
        }

        public static int Put(int id, tbuser user)
        {
            try
            {
                using (var context = new DataContext())
                {
                    var u = context.tbusers.Update(user);
                    context.SaveChanges();
                    return 200;
                }
            }
            catch (Exception ex)
            {
                return 300;
            }
        }
    }

<2.6> 新增userController Api

    [Produces("application/json")]
    [Route("api/user")]
    public class userController : Controller
    {
        // POST api/user
        [HttpPost]
        public int Post(tbuser user)
        {
            return tbuserDataHandle.adduser(user);
        }

        // GET api/user
        [HttpGet]
        public List<tbuser> Get()
        {
            return tbuserDataHandle.Get();
        }

        // GET api/user/5
        [HttpGet("{id}")]
        public tbuser Get(int id)
        {
            return tbuserDataHandle.Get(id);
        }

        // DELETE api/user/5
        [HttpDelete("{id}")]
        public int Delete(int id)
        {
            return tbuserDataHandle.Delete(id);
        }

        // PUT api/user/5
        [HttpPut("{id}")]
        public int Put(int id, tbuser user)
        {
            return tbuserDataHandle.Put(id, user);
        }
    }

3.生成項目，構建docker鏡像並創作容器運行

修改 docker-compose.yml ，docker-compose.override.yml  的 version 為：

 version: '2.0'

配置 appsettings.json 的 dbconn 為：

"dbconn": "server=192.168.99.100;user id=root;password=123456;persistsecurityinfo=True;port=3307;database=user;SslMode=none"

進入到 E:\web\ilinkcore （這個目錄為解決方案的根目錄）

docker-compose up

執行成功後創建一個 ilinkcore 的鏡像，並且運行了一個 ilinkcore_ilinkcore_1的容器，將本機的32783埠映射到容器的80埠

4.測試訪問介面

添加反向代理，修改nginx 配置

server{
    listen       84;
    server_name  localhost;
    location / {  
        proxy_pass   http://192.168.99.100:32783;  
        index  index.html index.htm;  
    }       
}

重新運行nginx，使用Postman進行api介面測試

<4.1> 測試介面進行添加user數據

Headers 中添加項：

Content-Type:application/json

<4.2>查看所有用戶數據

<4.3> 檢索某個用戶數據

<4.4> 更新某個用戶數據

Headers 中添加項：

Content-Type:application/json

<4.5> 刪除單個用戶