在DoNetCore MVC 中如何使用AutoMapper

刚开始，按照在donet mvc 的方法写了一遍，发现行不通啊，于是百度了一下，找到这么一篇 https://stackoverflow.com/questions/41284349/automapper-error-saying-mapper-not-initialized

动手开干  ，具体流程

1、Nuget 引入包

Install-Package  AutoMapper.Extensions.Microsoft.DependencyInjection

2、创建我们的源数据实体，创建我们的目标实体

   这是我的项目目录信息，其中红框中就是我们的源实体和目标实体

3、注入服务

在Startup.cs 类中 ConfigureServices 方法中最后一行  添加如下代码：

 services.AddAutoMapper();

 1  // This method gets called by the runtime. Use this method to add services to the container.
 2         public void ConfigureServices(IServiceCollection services)
 3         {
 4             services.Configure<CookiePolicyOptions>(options =>
 5             {
 6                 // This lambda determines whether user consent for non-essential cookies is needed for a given request.
 7                 options.CheckConsentNeeded = context => true;
 8                 options.MinimumSameSitePolicy = SameSiteMode.None;
 9             });
10 
11             //services.AddTransient<IAdminBusinessLoginService, AdminBusinessLoginService>();
12           
13 
14             var redisconn = Configuration.GetSection("RedisConnectionStrings");
15             services.AddOptions();
16             services.Configure<RedisConnectionStrings>(redisconn);
17 
18             var opt = Configuration.GetSection("RedisConnectionStrings");
19 
20             //Models.AutoMapperHelper.AutoMapperConfig.RegisterAutoMapper();
21 
22             services.AddSingleton<ICache, ICCSReidsiHelper>();
23 
24             services.AddAssembly("DSErpService");
25             services.AddAssembly("IDSErpService");
26             //注入上下文对象
27             var sqlConnection = Configuration.GetConnectionString("SchoolConnection");
28             services.AddDbContext<Db>(op => op.UseSqlServer(sqlConnection));
29 
30             services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme)
31             //前台用户cookie服务
32             .AddCookie(UserAuthorizeAttribute.UserAuthenticationScheme, options =>
33              {
34                  options.LoginPath = "/Login/Index";
35                  options.LogoutPath = "/Login/LogOff";
36                  options.AccessDeniedPath = new PathString("/Error/Forbidden");//拒绝访问页面
37                  options.Cookie.Path = "/";
38              });
39 
40             services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
41             services.AddAutoMapper();
42         }

如图：

4、创建我们的映射对象

这里直接上代码：

 1 public class CategoryProfiles : Profile
 2     {
 3         public CategoryProfiles()
 4         {
 5             CreateMap<BusinessCategory, CategoryDto>().ReverseMap()
 6                 .ForMember(a => a.Id, b => b.MapFrom(c => c.Id))
 7                 .ForMember(a => a.CategoryName, b => b.MapFrom(c => c.CategoryName))
 8                 .ForMember(a => a.StatusMark, b => b.MapFrom(c => c.StatusMark));
 9         }
10     }

5、实现

 1 [Route("category")]
 2     public class categoryController : Controller
 3     {
 4         /// <summary>
 5         /// 获取用户缓存信息
 6         /// </summary>
 7         private ICache cache;
 8         /// <summary>
 9         /// 分类服务管理
10         /// </summary>
11         private ICategoryService categoryService;
12         private readonly IMapper _mapper;
13         public categoryController(ICache _cache, ICategoryService _service, IMapper mapper)
14         {
15             this.cache = _cache;
16             this.categoryService = _service;
17             this._mapper = mapper;
18         }
19         
20 
21         [HttpGet("get-pagelist")]
22         public async Task<JsonResult> GetCategoryPageList(int pageindex, int pagesize)
23         {
24             return await Task.Run<JsonResult>(() =>
25             {
26                 var totalcount = 0;
27                 var reslist = this.categoryService.GetCategroryList(null, pageindex, pagesize, out totalcount);
28                 return Json(new
29                 {
30                     code = 0,
31                     msg = "",
32                     count = totalcount,
33                     data = this._mapper.Map<List<CategoryDto>>(reslist.data)
34                 });
35             });
36         }
37     }

说明：

this._mapper.Map<List<CategoryDto>>(reslist.data) 我这里是集合映射到集合 ，

this._mapper.Map<T>(T);

this._mapper.Map<List<T>>(listT);