AutoMapper.dll中发生'AutoMapper.AutoMapperMappingException'

Question

 public class ClientViewModel
    {
        [Required(ErrorMessage = "The Client Code field is required.")]  
        public string ClientCode { get; set; }
        [Required(ErrorMessage = "The Company Legal Name field is required.")]  
        public string CompanyLegalName { get; set; }
        public string Notes { get; set; }
        public string Address { get; set; }
        public string City { get; set; }
        public string State { get; set; }
        public string Zip { get; set; }
        public Nullable<DateTime> ScheduledDate { get; set; }
        public Nullable<decimal> AmountDiscount { get; set; }
    }

    public class Client
    {
        public string ClientCode { get; set; }   
        public string CompanyLegalName { get; set; }
        public string Notes { get; set; }
        public string Address { get; set; }
        public string City { get; set; }
        public string State { get; set; }
        public string Zip { get; set; }
        public Nullable<DateTime> ScheduledDate { get; set; }
        public Nullable<decimal> AmountDiscount { get; set; }
    }

编辑:

异常详细信息:AutoMapper.AutoMapperMappingException:缺少类型映射配置或不支持的映射.

映射类型:客户端 - > ClientViewModel myapp.Models.Client - > myapp.Models.ClientViewModel

目标路径:ClientViewModel

来源值:myapp.Models.Client

我的Client&ClientViewModel具有完全相同数量的道具,下面是我正在使用的代码和抛出错误而没有获得太多信息,我在这里缺少什么？

Client client = context.Clients.Where(x => x.CustomerID == id).FirstOrDefault();
ClientViewModel clientViewModel = Mapper.Map<Client, ClientViewModel>(client);

AutoMapper.dll中出现"AutoMapper.AutoMapperMappingException"类型的异常,但未在用户代码中处理

Answer 1

你忘了创建你的地图.将其添加到您的代码中(在调用Mapper类之前):

Mapper.CreateMap<Client, ClientViewModel>();
ClientViewModel cvm = Mapper.Map<Client, ClientViewModel>(client);

dotnetfiddle的工作演示.

Answer 2

在调用 Map 之前。您需要调用CreateMap：

Mapper.CreateMap<Client, ClientViewModel>();

通常，您会在应用程序初始化代码/类中调用它，例如在 global.asax.cs 中。