Question

class Program
    {
        static void Main(string[] args)
        {
            var emp1 = new Soure.Employee();
            emp1.TestEnum = Soure.MyEnum1.red;
            var emp2 = new Soure.Employee();
            emp2.TestEnum = Soure.MyEnum1.yellow;
            var empList = new List<Soure.Employee>() { emp1, emp2 }.AsQueryable();
            var mapExpr = Mapper.CreateMap<Soure.Employee, destination.Employee>();
            Mapper.CreateMap<Soure.Department, destination.Department>();
            Mapper.CreateMap<Soure.MyEnum1, destination.MyEnum2>();
            Mapper.AssertConfigurationIsValid();
            var mappedEmp = empList.Project().To<destination.Employee>();

        }  
    }

我将Source.Employee映射到Destination.Employee。可以映射所有属性。但是在枚举映射上，它让我无法将TestEnum映射到Int32 如果我使用覆盖

var mapExpr = Mapper.CreateMap<Soure.Employee, destination.Employee>()
        .ForMember(x => x.TestEnum, opt => opt.MapFrom(s => (destination.MyEnum2)s.TestEnum));

然后它有效。

映射类如下所示

namespace Soure
{
    public class Employee
    {
        public int Id { get; set; }
        public string Name { get; set; }

        public Department dept { get; set; }

        public int age { get; set; }

        public MyEnum1 TestEnum { get; set; }

        public Employee()
        {
            this.Id = 1;
            this.Name = "Test Employee  Name";
            this.age = 10;
            this.dept = new Department();
        }
    }

    public class Department
    {
        public int Id { get; set; }
        public string DeptName { get; set; }

        Employee emp { get; set; }

        public Department()
        {
            Id = 2;
            DeptName = "Test Dept";
        }
    }

    public enum MyEnum1
    {
        red,
        yellow
    }
}

namespace destination
{
    public class Employee
    {
        public int Id { get; set; }
        public string Name { get; set; }

        public int age { get; set; }
        public MyEnum2 TestEnum { get; set; }

        public Department dept { get; set; }

    }

    public class Department
    {
        public int Id { get; set; }
        public string DeptName { get; set; }

        Employee emp { get; set; }
    }
    public enum MyEnum2
    {
        red,
        yellow
    }
}

Answer 1

以下是使用AutoMapper ...

映射枚举数的两种方法

.ForMember(x => x.TestEnum, opt => opt.MapFrom(s => (int)s.TestEnum));

另一种方法是使用ConstructUsing

mapper.CreateMap<TestEnum, Soure.MyEnum1>().ConstructUsing(dto => Enumeration.FromValue<Soure.MyEnum1>((int)dto.MyEnum2));

如何在自动映射器中的iqueryable映射中为枚举创建映射？

1 个答案: