AutoMapper 没有按预期工作？

Question

我的域层有一个类，如下所示：

 public class Employee : AuditableEntity
    {
        public string FirstName { get; set; }
        public string Surname { get; set; }
        public double Salary{ get; set; }
        public int PhoneNo { get; set; }

        public double Bonus
        {
            get { return Salary + EmployeeAdditionals.Sum(e => e.Value); }
        }

        // virtual allow lazy loading
        public virtual ReadOnlyCollection<EmployeeAdditional> EmployeeAdditionals { get; private set; }

        // Paramterless constructor for EF
        public Employee()
        {
            EmployeeAdditionals = new List<EmployeeAdditional>();
        }

        public void AddAdditionalInfo(EmployeeAdditional additionalInfo)
        {
            additionalInfo.Employee = this;
            additionalInfo.EmployeeId = Id;

            ((Collection<EmployeeAdditional>) EmployeeAdditionals).Add(additionalInfo);
        }

然后我的 MVC 5 应用程序中有以下 viewModel 类：

 public class EmployeeDetailsViewModel : BaseViewModel
    {
        public EmployeeDetailsViewModel()
        {
            Employee = new Employee();
        }

        public Employee Employee { get; set; }
        //Other fields

    }

    public class Employee
    {
        [DisplayName("Employee First Name")]
        public string FirstName { get; set; }

        [DisplayName("Employee Surname")]
        public string Surname{ get; set; }

        public double Salary{ get; set; }

        [RegEx for Phone Number and Error Mesage]
        public int PhoneNo{ get; set; }

        public double Bonus { get; set; }
    }

然后我在我的控制器和 viewModel 构建器中进行了映射，以将我的视图模型映射到我的域模型和域模型回到视图模型，我正在尝试使用 AutoMapper。

使用如下手动映射：

// set domain from viewModel
employee.FirstName= model.Employee.FirstName;
//etc for rest of fields

// set view model from domain
viewModel.Employee.FirstName = employee.FirstName;
//etc for rest of fields

现在在 Setup 方法中的 AutoMapperBootstrapper 类中，我有以下内容：

  Mapper.CreateMap<Domain.Models.Employee, Employee>();
  Mapper.CreateMap<Employee, Domain.Models.Employee>();

然后我在我的控制器和视图模型构建器中使用它：

//set domain from viewModel
Mapper.Map(employee, model.Employee);

// set viewmodel from domain
Mapper.Map(viewModel.Employee, employee);

当我在从域映射到 viewModel 时遇到断点时，我看到 model.Employee 带有来自屏幕的值，但是当我越过这条线时，值不会映射到域雇员，然后 model.Emplyee 值被重置为字符串为 null，为双精度为 0.0，等等。

我的配置或使用自动映射器有什么不正确的地方吗？

Answer 1

你传递了错误的参数。如果要使用现有实例，请确保第一个参数是源，第二个参数是目标。

尝试切换参数。

//set domain from viewModel (viewModel is the source)
Mapper.Map(model.Employee, employee);
              ^^^^^         ^^^^^
              source      destination 

// set viewmodel from domain (domain is the source)
Mapper.Map(employee, viewModel.Employee);
            ^^^^^           ^^^^^
            source      destination 

Answer 2

你的地图代码不应该是这样的吗？您必须使用Map() 的实例，看起来您正在使用Types

//set domain from viewModel
Mapper.Map(viewEmployee, new model.Employee());

// set viewmodel from domain
Mapper.Map( employee, new viewmodel.Employee());

这就是我希望你使用它的方式：

var viewModel = Mapper.Map<ViewModel.Employee>(domainModel);  <-- this creates a ViewModel for a Domain Model

反之则为：

var domainModel  = Mapper.Map<Domain.Employee>(viewModel);