EFCore实践测试一

.NET的生态圈感觉还是太闭塞了，反观thinkphp，python，想学习的话，大把资料可以参考，也有大把视频可以学习，.NET这也收费，那也收费，不是说不尊重别人的劳动成果，而是我觉得大家有必要先把氛围带动起来，建立一个良好的生态圈，更多人学会，更多人会使用，加入到.NET里面来，才会有更好的发展，然后再是其他，我百度找了很多.NETCORE的EFCORE资料，感觉不多，我自己实践做点例子，有需要的可以试试

1.新建一个控制台，只为测试EF，如果要是测试MVC，相关注册可参考如下

控制台，引入Microsoft.EntityFrameworkCore，Microsoft.EntityFrameworkCore.sqlserver  ------------NUGET

MVC：

Startup中

public Startup(IConfiguration _configuration)
        {
            configuration = _configuration;
        }

        public void ConfigureServices(IServiceCollection services)
        {
            //https://blog.csdn.net/u011511086/article/details/80609548
            services.AddMvc();
            services.AddEntityFrameworkSqlServer();
            //services.AddEntityFrameworkSqlServer();
            var connectionString = configuration["ConnectionStrings:DefaultConnection"];
            //dbContextOptions.UseSqlServer(connectionString, b => b.UseRowNumberForPaging());providerOptions => providerOptions.CommandTimeout(120)
            services.AddDbContext<DataContext>(options =>
            {
                options.UseSqlServer(connectionString, providerOptions =>
                  {
                      //providerOptions.UseRowNumberForPaging(true);
                      providerOptions.CommandTimeout(120);

                  });
                
            });
            services.AddScoped<IService<t_company>, t_companyService>();
            //services.AddControllersWithViews();

        }

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

        //protected override void OnModelCreating(ModelBuilder modelBuilder)
        //{
        //    var assembly = Assembly.GetExecutingAssembly();
        //    foreach (Type type in assembly.ExportedTypes)
        //    {
        //        if (type.IsClass && type != typeof(EntityBase) && typeof(EntityBase).IsAssignableFrom(type))
        //        {
        //            var method = modelBuilder.GetType().GetMethods().Where(x => x.Name == "Entity").FirstOrDefault();

        //            if (method != null)
        //            {
        //                method = method.MakeGenericMethod(new Type[] { type });
        //                method.Invoke(modelBuilder, null);
        //            }
        //        }
        //    }

        //    base.OnModelCreating(modelBuilder);
        //}
        public virtual DbSet<t_company> t_company { get; set; }
        public virtual DbSet<t_dep> t_dep { get; set; }
        public virtual DbSet<t_role> t_role { get; set; }
        public virtual DbSet<t_user> t_user { get; set; }
        public DbSet<ThinkAsp.Web.Model.t_test> t_test { get; set; }
    }

appsettings.json中设置连接字符串：

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "AllowedHosts": "*",
  "ConnectionStrings": {
    "DefaultConnection": "Data Source = .;Initial Catalog = XXXX;User Id = sa;Password = 123456;"
  }
}

2.继续控制台

using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Text;

namespace EFStudy
{
    public class BloggingContext : DbContext
    {
        public DbSet<Blog> Blogs { get; set; }
        public DbSet<Post> Posts { get; set; }
        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            //optionsBuilder.UseSqlServer(ConfigurationManager.ConnectionStrings["BloggingDatabase"].ConnectionString);
            optionsBuilder.UseSqlServer("Data Source = .;Initial Catalog = Test;User Id = sa;Password = 123456;");
        }

        public class Blog
        { 
            public int BlogId { get; set; }
            public string Url { get; set; }
            public int Rating { get; set; } 
            public List<Post> Posts { get; set; }
        }
        public class Post 
        { 
            public int PostId { get; set; }
            public string Title { get; set; }
            public string Content { get; set; } 
            //public int BlogId { get; set; } 
            public Blog Blog { get; set; }
        }
    }
}

PM:Install-Package Microsoft.EntityFrameworkCore.Tools

失败用nuget安装

add-migration initcitydata01

update-database

执行完毕开始操作：

待续