.NET Core Identity 使用Mysql数据库

一、在NuGet安装EF 

1、 Pomelo.EntityFrameworkCore.MySql

2、Pomelo.EntityFrameworkCore.MySql.Design

3、Microsoft.EntityFrameworkCore.Tools

二、新建identity用户角色实体类和数据库上下文

用户类和角色类 

 public class ApplicationUser : IdentityUser
    {
        //扩展用户属性
    }
    public class ApplicationRole : IdentityRole
    {
        //扩展角色属性
    }

 数据库上下文

public class ApplicationDbContext : IdentityDbContext<ApplicationUser, ApplicationRole, string>
    {
        public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options) : base(options)
        {
        }
        protected override void OnModelCreating(ModelBuilder builder)
        {
            base.OnModelCreating(builder);
        }
    }

三、在appsettings.json文件中配置数据库连接字符串

"ConnectionStrings": {
    "DefaultConnection": "Server=127.0.0.1;database=testdb;uid=root;password=pwd123456;TreatTinyAsBoolean=true"
  },

 注意TreatTinyAsBoolean=true 最好加上   原因：bool类型字段对应到ef会生产bit字段。如果不在连接字符串中添加TreatTinyAsBoolean=true 插入数据的时候会报Unable to cast object of type 'System.Boolean' to type 'System.Int16这个错

四、在Startup文件中注册数据库上下文服务和对identity进行相关设置

注册服务

 services.AddDbContext<ApplicationDbContext>(options => options.UseMySql(Configuration.GetConnectionString("DefaultConnection")));
            services.AddIdentity<ApplicationUser, ApplicationRole>()
              .AddEntityFrameworkStores<ApplicationDbContext>()
              .AddDefaultTokenProviders();

对identity进行配置（可不做！）

services.Configure<IdentityOptions>(options =>
            {
                // Password settings
                options.Password.RequireDigit = false;
                options.Password.RequiredLength = 6;
                options.Password.RequireNonAlphanumeric = false;
                options.Password.RequireUppercase = false;
                options.Password.RequireLowercase = false;
                options.Password.RequiredUniqueChars = 1;

                // Lockout settings
                options.Lockout.DefaultLockoutTimeSpan = TimeSpan.FromMinutes(30);
                options.Lockout.MaxFailedAccessAttempts = 10;
                options.Lockout.AllowedForNewUsers = true;

                // User settings
                options.User.AllowedUserNameCharacters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-._@+";
                options.User.RequireUniqueEmail = false;
            });
            services.ConfigureApplicationCookie(options =>
            {
                // Cookie settings
                options.Cookie.HttpOnly = true;
                options.Cookie.Expiration = TimeSpan.FromDays(150);
                // If the LoginPath isn't set, ASP.NET Core defaults 
                // the path to /Account/Login.
                options.LoginPath = "/Account/Login";
                // If the AccessDeniedPath isn't set, ASP.NET Core defaults 
                // the path to /Account/AccessDenied.
                options.AccessDeniedPath = "/Account/AccessDenied";
                options.SlidingExpiration = true;
            });

五、迁移（在程序包管理控制台中）

1、输入Enable-Migrations 开启迁移

2、输入Add-Migration Initial建立快照（Initial快照名称随意写）

成功之后生成迁移文件

3、输入 Update-Database 升级数据库

成功之后查看数据库生成情况

                                       新增数据表

一、添加实体类TestTable

public class TestTable
    {
        public int TestTableId { get; set; }
        public string TestTableName { get; set; }
    }

 在数据库上下文中添加表映射

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

Add-Migration Initial1 执行迁移

Update-Database 升级数据库