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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 AutoMapper Mapper.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 mapping OrderDto 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); }
使用automapper先建立映射关系，在执行映射。
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原文地址：http://www.cnblogs.com/tengguang/p/4542166.html
