Vs2017 NetCode Mvc EF Mysql 整合2

1 NetCode EF整合 代码

3  源代码 https://github.com/chxl800/EFMysqlDemo

1.1 项目文件结构

1.2 NuGet  MySql.Data.EntityFrameworkCore 8.0.18

1.3 appsettings.json   增加数据库字符串链接ConnectionStrings

{
    "Logging": {
        "IncludeScopes": false,
        "LogLevel": {
            "Default": "Warning"
        }
    },
    "ConnectionStrings": { "MysqlConnection": "Data Source=localhost;Database=demodb;User ID=root;Password=root;pooling=true;CharSet=utf8;port=3306;sslmode=none" }
}

1.4 DBEntities.cs 添加数据库上下文

using EFMysqlNetCodeMvc.Models;
using Microsoft.EntityFrameworkCore;

namespace EFMysqlNetCodeMvc
{
    public class DBEntities : DbContext
    {
        public DBEntities(DbContextOptions<DBEntities> options) : base(options)
        {
        }

        ////这里也可以
        //string str = @"Data Source=localhost;Database=demodb;User ID=root;Password=root;pooling=true;CharSet=utf8;port=3306;sslmode=none";

        //protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) =>
        //    optionsBuilder.UseMySQL(str);

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

1.5 User.cs 增加数据库表实体类

1.6 Startup.cs 配置重点 有中文注释的新加的

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using EFMysqlNetCodeMvc;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Newtonsoft.Json.Serialization;

namespace EFMysqlNetCodeMvc
{
    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)
        {
            //json格式化
            services.AddMvc()
            .AddJsonOptions(options =>
            {
                //忽略循环引用
                //options.SerializerSettings.ReferenceLoopHandling = ReferenceLoopHandling.Ignore;

                //设置序列化时key为驼峰样式,开头字母小写输出  controller调用Josn(对象)
                options.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
                //原样输出
                //options.SerializerSettings.ContractResolver = new DefaultContractResolver();

                //时间格式
                options.SerializerSettings.DateFormatString = "yyyy-MM-dd HH:mm:ss";

                //空值的字段不显示
                //options.SerializerSettings.NullValueHandling = NullValueHandling.Ignore;
            });

            //ef mysql 配置IOC
            services.AddDbContext<DBEntities>(options => options.UseMySQL(Configuration.GetConnectionString("MySqlConnection")));
            services.AddMvc();
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseBrowserLink();
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
            }

            app.UseStaticFiles();

            // 跨域策略
            app.UseCors(builder => builder.AllowAnyOrigin().AllowAnyMethod().AllowAnyHeader().AllowCredentials());

            //app.UseMvc();
            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "default",
                    template: "{controller=Home}/{action=Index}/{id?}");
            });
        }
    }
}

1.7 HomeController.cs   mvc 代码用于测试

public class HomeController : Controller{

DBEntities db; 

public HomeController(DBEntities db)
{
     this.db = db;
}

      public IActionResult Test()
        {

            //查询
            List<User> list = db.User.ToList();

            //json序列化
            //var userJson = JsonConvert.SerializeObject(list);
            //var userList = JsonConvert.DeserializeObject<List<User>>(userJson);

            return Json(list);
        }

        public IActionResult Add([FromBody] User user)
        {
            //新增
            //User user = new User();
            //user.Id = Guid.NewGuid().ToString().Replace("-", "");
            //db.User.Add(user);
            //db.SaveChanges();

            return Json(user);
        }
}

1.8 运行结果

1.9 重点代码说明

1.9.1 URL:/home/test   实体User.cs首字母大写  输出首字母变小写

            //json格式化
            services.AddMvc()
            .AddJsonOptions(options =>
            {
                //忽略循环引用
                //options.SerializerSettings.ReferenceLoopHandling = ReferenceLoopHandling.Ignore;

                //设置序列化时key为驼峰样式,开头字母小写输出  controller调用Josn(对象)
                options.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
                //原样输出
                //options.SerializerSettings.ContractResolver = new DefaultContractResolver();

                //时间格式
                options.SerializerSettings.DateFormatString = "yyyy-MM-dd HH:mm:ss";

                //空值的字段不显示
                //options.SerializerSettings.NullValueHandling = NullValueHandling.Ignore;
            });

1.9.2 URL:/home/add   输入参数首字母小写  自动转化为实体User.cs首字母大写

public IActionResult Add([FromBody] User user)

2.0 User.cs

using System;

namespace EFMysqlNetCodeMvc.Models
{
    /// <summary>
    /// 账号表
    /// </summary>
    public class User
    {
        /// <summary>
        ///
        /// </summary>
        public string Id { get; set; }
        /// <summary>
        ///
        /// </summary>
        public string TenantId { get; set; }
        /// <summary>
        ///
        /// </summary>
        public string UserName { get; set; }
        /// <summary>
        ///
        /// </summary>
        public string RealName { get; set; }
        /// <summary>
        ///
        /// </summary>
        public string UserCode { get; set; }
        /// <summary>
        ///
        /// </summary>
        public string Password { get; set; }
        /// <summary>
        ///
        /// </summary>
        public string Salt { get; set; }
        /// <summary>
        ///
        /// </summary>
        public string Mobile { get; set; }
        /// <summary>
        ///
        /// </summary>
        public string Email { get; set; }
        /// <summary>
        ///
        /// </summary>
        public int UserType { get; set; }
        /// <summary>
        ///
        /// </summary>
        public int Status { get; set; }
        /// <summary>
        ///
        /// </summary>
        public string Creator { get; set; }
        /// <summary>
        ///
        /// </summary>
        public DateTime CreateTime { get; set; }
        /// <summary>
        ///
        /// </summary>
        public string Reviser { get; set; }
        /// <summary>
        ///
        /// </summary>
        public DateTime ReviseTime { get; set; }
        /// <summary>
        ///
        /// </summary>
        public DateTime? LoginTime { get; set; }
        /// <summary>
        ///
        /// </summary>
        public string IP { get; set; }
        /// <summary>
        ///
        /// </summary>
        public DateTime? LastLoginTime { get; set; }
        /// <summary>
        ///
        /// </summary>
        public string LastIP { get; set; }
    }
}