netCore3.0+webapi到前端vue（前后分离）

public class gj
    {
        // 

        /// 主键
        /// 
        public int id { get; set; }

        /// 

        /// 标题
        /// 
        public string method { get; set; }
        /// 

        /// 内容
        /// 
        public string text { get; set; }
        /// 

        /// 状态 1正常 0删除
        /// 
        public string type { get; set; }
    }

   public class DbModel:DbContext
    {
         public DbSet gj { set; get; }

        //protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        //    => optionsBuilder.UseMySQL(@"Server=localhost;database=testapp;uid=root;pwd=woshishui");
        public DbModel(DbContextOptions options) : base(options)
        {

        }
    }

{
  "ConnectionStrings": {
    "DefaultConnection": "Server=xxxx;database=testapp;uid=root;pwd=xxxx;"
  },
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "AllowedHosts": "*"
}

 public void ConfigureServices(IServiceCollection services)
        {
            //连接 mysql 数据库，添加数据库上下文
            services.AddDbContext(options =>
                options.UseMySQL(Configuration.GetConnectionString("DefaultConnection")));

            services.AddControllers();
          
        }

 private readonly DbModel _coreDbContext;

        public ValuesController(DbModel coreDbContext)
        {
            _coreDbContext = coreDbContext;
        }

        // GET api/values
        [HttpGet]   
        public List Get()
        {
            return _coreDbContext.Set().ToList();
          
        }