.net core2.0下使用Identity改用dapper存储数据(实例讲解)

前言、

已经好多天没写博客了，鉴于空闲无聊之时又兴起想写写博客，也当是给自己做个笔记。过了这么些天，我的文笔还是依然那么烂就请多多谅解了。今天主要是分享一下在使用.net core2.0下的实际遇到的情况。在使用webapi时用了identity做用户验证。官方文档是的是用EF存储数据来使用dapper，因为个人偏好原因所以不想用EF。于是乎就去折腾。改成使用dapper做数据存储。于是就有了以下的经验。

一、使用Identity服务

先找到Startup.cs 这个类文件 找到 ConfigureServices 方法

services.AddIdentity().AddDefaultTokenProviders();//添加Identity
services.AddTransient, CustomUserStore>();
services.AddTransient, CustomRoleStore>();
string connectionString = Configuration.GetConnectionString("SqlConnectionStr");
services.AddTransient(e => new SqlConnection(connectionString));
services.AddTransient();

然后在 Configure 方法 的 app.UseMvc() 前加入下列代码，net core 1.0的时候是app.UseIdentity() 现在已经弃用改为以下方法。

//使用验证
app.UseAuthentication();

这里的 ApplicationUser 是自定义的一个用户模型 具体是继承 IdentityUser 继承它的一些属性

public class ApplicationUser :IdentityUser
 {
  public string AuthenticationType { get; set; }
  public bool IsAuthenticated { get; set; }
  public string Name { get; set; }
 }

这里的 CustomUserStore 是自定义提供用户的所有数据操作的方法的类它需要继承三个接口：IUserStore，IUserPasswordStore，IUserEmailStore

IUserStore接口是在用户存储中必须实现的唯一接口。 它定义了用于创建、 更新、 删除和检索用户的方法。

IUserPasswordStore接口定义实现以保持经过哈希处理的密码的方法。 它包含用于获取和设置工作经过哈希处理的密码，以及用于指示用户是否已设置密码的方法的方法。

IUserEmailStore接口定义实现以存储用户电子邮件地址的方法。 它包含用于获取和设置的电子邮件地址和是否确认电子邮件的方法。

这里跟.net core 1.0的实现接口方式有点不同。需要多实现 IUserEmailStore 才能不报错

具体代码如下。以供大家参考。

CustomUserStore

using Microsoft.AspNetCore.Identity;
using System;
using System.Threading.Tasks;
using System.Threading;

namespace YepMarsCRM.Web.CustomProvider
{
 /// 

 /// This store is only partially implemented. It supports user creation and find methods.
 /// 
 public class CustomUserStore : IUserStore,
  IUserPasswordStore,
  IUserEmailStore
 {
  private readonly DapperUsersTable _usersTable;

  public CustomUserStore(DapperUsersTable usersTable)
  {
   _usersTable = usersTable;
  }

  #region createuser
  public async Task CreateAsync(ApplicationUser user,
   CancellationToken cancellationToken = default(CancellationToken))
  {
   cancellationToken.ThrowIfCancellationRequested();
   if (user == null) throw new ArgumentNullException(nameof(user));

   return await _usersTable.CreateAsync(user);
  }
  #endregion

  public async Task DeleteAsync(ApplicationUser user,
   CancellationToken cancellationToken = default(CancellationToken))
  {
   cancellationToken.ThrowIfCancellationRequested();
   if (user == null) throw new ArgumentNullException(nameof(user));

   return await _usersTable.DeleteAsync(user);

  }

  public void Dispose()
  {
  }

  public Task FindByEmailAsync(string normalizedEmail, CancellationToken cancellationToken)
  {
   throw new NotImplementedException();
  }

  public async Task FindByIdAsync(string userId,
   CancellationToken cancellationToken = default(CancellationToken))
  {
   cancellationToken.ThrowIfCancellationRequested();
   if (userId == null) throw new ArgumentNullException(nameof(userId));
   Guid idGuid;
   if (!Guid.TryParse(userId, out idGuid))
   {
    throw new ArgumentException("Not a valid Guid id", nameof(userId));
   }

   return await _usersTable.FindByIdAsync(idGuid);

  }

  public async Task FindByNameAsync(string userName,
   CancellationToken cancellationToken = default(CancellationToken))
  {
   cancellationToken.ThrowIfCancellationRequested();
   if (userName == null) throw new ArgumentNullException(nameof(userName));

   return await _usersTable.FindByNameAsync(userName);
  }

  public Task GetEmailAsync(ApplicationUser user, CancellationToken cancellationToken)
  {
   cancellationToken.ThrowIfCancellationRequested();
   if (user == null) throw new ArgumentNullException(nameof(user));

   return Task.FromResult(user.Email);
  }

  public Task GetEmailConfirmedAsync(ApplicationUser user, CancellationToken cancellationToken)
  {
   throw new NotImplementedException();
  }

  public Task GetNormalizedEmailAsync(ApplicationUser user, CancellationToken cancellationToken)
  {
   throw new NotImplementedException();
  }

  public Task GetNormalizedUserNameAsync(ApplicationUser user, CancellationToken cancellationToken)
  {
   throw new NotImplementedException();
  }

  public Task GetPasswordHashAsync(ApplicationUser user, CancellationToken cancellationToken)
  {
   cancellationToken.ThrowIfCancellationRequested();
   if (user == null) throw new ArgumentNullException(nameof(user));

   return Task.FromResult(user.PasswordHash);
  }

  public Task GetUserIdAsync(ApplicationUser user, CancellationToken cancellationToken)
  {
   cancellationToken.ThrowIfCancellationRequested();
   if (user == null) throw new ArgumentNullException(nameof(user));

   return Task.FromResult(user.Id.ToString());
  }

  public Task GetUserNameAsync(ApplicationUser user, CancellationToken cancellationToken)
  {
   cancellationToken.ThrowIfCancellationRequested();
   if (user == null) throw new ArgumentNullException(nameof(user));

   return Task.FromResult(user.UserName);
  }

  public Task HasPasswordAsync(ApplicationUser user, CancellationToken cancellationToken)
  {
   throw new NotImplementedException();
  }

  public Task SetEmailAsync(ApplicationUser user, string email, CancellationToken cancellationToken)
  {
   throw new NotImplementedException();
  }

  public Task SetEmailConfirmedAsync(ApplicationUser user, bool confirmed, CancellationToken cancellationToken)
  {
   throw new NotImplementedException();
  }

  public Task SetNormalizedEmailAsync(ApplicationUser user, string normalizedEmail, CancellationToken cancellationToken)
  {
   cancellationToken.ThrowIfCancellationRequested();
   if (user == null) throw new ArgumentNullException(nameof(user));
   if (normalizedEmail == null) throw new ArgumentNullException(nameof(normalizedEmail));

   user.NormalizedEmail = normalizedEmail;
   return Task.FromResult