automapper的简单用法

AutoMapper对象转换方面（Object-Object Mapping）对象映射工具，实现对象和对象之间的转化。主要应用在项目的dto，model，entity或viewmodel之间转换，其实AutoMapper涵盖所有对象（Object）之间的转换。

下面演示他的基本用法：

    public class Customer{public Guid Id { get; set; }public string Number { get;  set; }public string Name { get; set; }public DateTime RegDate { get; set; }public string Note { get; set; }public string Address { get; set; }public string CategoryID { get; set; }}public class Product{public string Id { get; set; }public string Number { get; set; }public string Name { get; set; }public decimal Price { get; set; }}public class Order{public Customer Customer { get; set; }public Product Product { get; set; }public decimal Qty { get; set; }public decimal Getamount(){return Product.Price*Qty;}}

先建立这几个类，order、customer、product显示订单业务，这些放到领域层。在前台表现层时，可能不需要order类这么复杂，只要orderDto这个简单的类就行了。

    public class OrderDto{public string CustomerName { get; set; }public string Address { get; set; }public decimal Amount { get; set; }}

这就需要把order的数据转到orderdto对象中。使用automapper进行转换代码如下

public void Test(){//先建立实例化对象Customer _customer = new Customer(){Id = new Guid("E8C1D91F-7076-489B-BAA8-8F563BA07402"),Number = "01.001",Name = "明康医院",RegDate = DateTime.Now,Note = "sadfasdfsdafsdaf",Address = "XX省sss市CCC路32号门诊楼对面",CategoryID = "01"};Product _product = new Product() {Id = "1", Name = "中国式局大全", Number = "00892", Price = 65.8m};Order _odr = new Order(){  Customer = _customer,Product = _product,Qty = 6765m};// 配置 AutoMapperMapper.CreateMap<Order,OrderDto>().ForMember(dest => dest.CustomerName, opt => opt.MapFrom(src => src.Customer.Name))//定义映射规则.ForMember(dest => dest.Address, opt => opt.MapFrom(src => src.Customer.Address))//定义映射规则.ForMember(dest => dest.Amount, opt => opt.MapFrom(src => src.Getamount()));//定义映射规则// 执行 mappingOrderDto form = Mapper.Map<Order, OrderDto>(_odr);Console.WriteLine("客户名称:"+form.CustomerName);Console.WriteLine("客户地址:" + form.Address);Console.WriteLine("总金额:" + form.Amount);}