/// 映射的时候一定要保证目标对象的属性是可写的，要不该属性没有效果。
/// 1：扁平化映射
/// 规则：将一个复杂的多层次对象转化为一个单层对象
/// 1：如果有相同属性，则对相同属性进行映射
/// 2：如果没有同名的属性，
/// 则检查同名的方法，
/// 再再检查是否有Get开头的同名方法
/// 然后将 目标对象的属性 按照Pascal规则对属性进行分割，去映射属性
/// 并且每个单词之间还可以组合，就是属性是多个单词页能识别。
/// 属性的类型不会影响优先级关系。
/// 2：映射功能测试
/// 在属性的名字或者是属性的类型不一致的情况下，可以使用映射功能，
/// MapFrom为目标对象设置值
/// 3：映射验证
/// 检查是否所有的目标属性都有对应的映射以及类型是否一致。
/// 4：集合的映射
/// 只需要对元素进行配置就可以了，
/// IEnumerable，IEnumerable<T>，ICollection，ICollection<T>，IList，IList<T>，List<T>，Arrays
/// 都默认支持
/// 5：嵌套映射
/// 可以将一个复杂对象映射为另外的一个复杂对象
/// 6：自定义类型转换器
/// 在全局范围内，将一种类型转换为另外的一种类型
/// 比如讲string 转换为时间，将string 转换为类对象，或者将类对象转换为string等
/// 7：自定义属性值映射器
/// 主要是解决值需要通过一个函数计算来获得的情况,
/// 鸡肋功能，可以用MapFrom替代
/// 8：空值的处理
/// 当源对象为空时，目标对象的处理办法
/// 9：继承关系的映射处理
/// 继承的优先级别是：
/// a：类本身的直接映射MapFrom
/// b：继承的直接映射MapFrom
/// c：本身的Ignore映射
/// d：默认规则映射
/// e：继承的Ignore映射
/// 需要注意的是 NullSubstitute没有被继承下来，需要在子类里接着写
/// 10：条件映射处理Condition
/// 当满足条件时才能进行映射处理
/// 11：创建动态映射
/// 当源数据类型不是那么严格时，可以使用动态映射DynamicMap
定义数据结构：
#region 数据库结构信息
public class CustomerInfo : ModelBase
{
private Guid id = Guid.Empty;
public Guid Id
{
get { return id; }
set { id = value; }
}
private string name = string.Empty;
public string Name
{
get { return name; }
set { name = value; }
}
private List<OrderInfo> orders = new List<OrderInfo>();
public List<OrderInfo> Orders
{
get { return orders; }
set { orders = value; }
}
public int OrderCount
{
get
{
if (orders == null)
{
return 0;
}
return orders.Count;
}
}
public OrderInfo MainOrder
{
get
{
if (orders.Count > 0)
{
return orders[0];
}
return null;
}
}
public int GetName()
{
return 100;
}
}
public class OrderInfo : ModelBase
{
private string name = "";
public string Name
{
get { return name; }
set { name = value; }
}
private DateTime createDate = DateTime.Now;
public DateTime CreateDate
{
get { return createDate; }
set { createDate = value; }
}
private PaymentInfo payment = null;
public PaymentInfo Payment
{
get { return payment; }
set { payment = value; }
}
private Guid customerId = Guid.Empty;
public Guid CustomerId
{
get { return customerId; }
set { customerId = value; }
}
private Guid id = Guid.Empty;
public Guid Id
{
get { return id; }
set { id = value; }
}
private CustomerInfo customer = null;
public CustomerInfo Customer
{
get { return customer; }
set { customer = value; }
}
private List<OrderItemInfo> orderItems = new List<OrderItemInfo>();
public List<OrderItemInfo> OrderItems
{
get { return orderItems; }
set { orderItems = value; }
}
public int GetItemsCount()
{
if (orderItems == null)
{
return 0;
}
return orderItems.Count;
}
public string SameProperty1
{
get
{
return "相同属性";
}
}
public string GetSameProperty1()
{
return "方法——相同属性";
}
public int SameProperty2
{
get
{
return 222;
}
}
public string GetSameProperty2()
{
return "方法——222相同属性";
}
public string SameProperty3
{
get
{
return "222";
}
}
public int GetSameProperty3()
{
return 222;
}
}
public class TelephoneOrderInfo : OrderInfo
{
private string telephone = "";
public string Telephone
{
get { return telephone; }
set { telephone = value; }
}
}
public class WeixinOrderInfo : OrderInfo
{
private string openId = "";
public string OpenId
{
get { return openId; }
set { openId = value; }
}
}
public class OrderItemInfo : ModelBase
{
private Guid id = Guid.Empty;
public Guid Id
{
get { return id; }
set { id = value; }
}
private int count = 0;
public int Count
{
get { return count; }
set { count = value; }
}
private OrderInfo order = null;
public OrderInfo Order
{
get { return order; }
set { order = value; }
}
private Guid goodsId = Guid.Empty;
public Guid GoodsId
{
get { return goodsId; }
set { goodsId = value; }
}
private GoodsInfo goods = null;
public GoodsInfo Goods
{
get { return goods; }
set { goods = value; }
}
}
public class GoodsInfo : ModelBase
{
private Guid id = Guid.Empty;
public Guid Id
{
get { return id; }
set { id = value; }
}
private string name = string.Empty;
public string Name
{
get { return name; }
set { name = value; }
}
private decimal price = 0;
public decimal Price
{
get { return price; }
set { price = value; }
}
private int goodsType = 0;
public int GoodsType
{
get { return goodsType; }
set { goodsType = value; }
}
}
public class PaymentInfo : ModelBase
{
private Guid id = Guid.Empty;
public Guid Id
{
get { return id; }
set { id = value; }
}
private DateTime payDate = DateTime.MinValue;
public DateTime PayDate
{
get { return payDate; }
set { payDate = value; }
}
}
#endregion 数据库结构信息
#region 前端展现信息
public class CustomerInfoVModel : ModelBase
{
private Guid id = Guid.Empty;
public Guid Id
{
get { return id; }
set { id = value; }
}
private string name = string.Empty;
public string Name
{
get { return name; }
set { name = value; }
}
private int orderCount = 0;
public int OrderCount
{
get { return orderCount; }
set { orderCount = value; }
}
}
public class OrderInfoVModel : ModelBase
{
private string payment = string.Empty;
public string Payment
{
get { return payment; }
set { payment = value; }
}
private CustomerInfoVModel customer2;
public CustomerInfoVModel Customer2
{
get { return customer2; }
set { customer2 = value; }
}
private string customerMainOrderSameProperty1 = "";
public string CustomerMainOrderSameProperty1
{
get { return customerMainOrderSameProperty1; }
set { customerMainOrderSameProperty1 = value; }
}
private int customerMainOrderSameProperty2 = 0;
public int CustomerMainOrderSameProperty2
{
get { return customerMainOrderSameProperty2; }
set { customerMainOrderSameProperty2 = value; }
}
private int customerMainOrderSameProperty3 = 0;
public int CustomerMainOrderSameProperty3
{
get { return customerMainOrderSameProperty3; }
set { customerMainOrderSameProperty3 = value; }
}
private string customerMainOrderName = "";
public string CustomerMainOrderName
{
get { return customerMainOrderName; }
set { customerMainOrderName = value; }
}
private DateTime customerMainOrderCreateDate = DateTime.Now;
public DateTime CustomerMainOrderCreateDate
{
get { return customerMainOrderCreateDate; }
set { customerMainOrderCreateDate = value; }
}
private decimal totalAmount = 0;
public decimal TotalAmount
{
get { return totalAmount; }
set { totalAmount = value; }
}
private DateTime createDate = DateTime.Now;
public DateTime CreateDate
{
get { return createDate; }
set { createDate = value; }
}
private string customerName = "";
public string CustomerName
{
get { return customerName; }
set { customerName = value; }
}
private int customerOrderCount = 0;
public int CustomerOrderCount
{
get { return customerOrderCount; }
set { customerOrderCount = value; }
}
private int itemsCount = 0;
public int ItemsCount
{
get { return itemsCount; }
set { itemsCount = value; }
}
private string yearMonth = "";
public string YearMonth
{
get { return yearMonth; }
set { yearMonth = value; }
}
List<string> orderItemDescs = new List<string>();
public List<string> OrderItemDescs
{
get { return orderItemDescs; }
set { orderItemDescs = value; }
}
}
public class OrderItemInfoVModel : ModelBase
{
private Guid id = Guid.Empty;
public Guid Id
{
get { return id; }
set { id = value; }
}
private int count = 0;
public int Count
{
get { return count; }
set { count = value; }
}
private Guid orderId = Guid.Empty;
public Guid OrderId
{
get { return orderId; }
set { orderId = value; }
}
private string goodsName = "";
public string GoodsName
{
get { return goodsName; }
set { goodsName = value; }
}
private decimal goodsPrice = 0;
public decimal GoodsPrice
{
get { return goodsPrice; }
set { goodsPrice = value; }
}
private decimal totalAmount = 0;
public decimal TotalAmount
{
get { return totalAmount; }
set { totalAmount = value; }
}
}
public class TelephoneOrderInfoVModel : OrderInfoVModel
{
private string telephone = "";
public string Telephone
{
get { return telephone; }
set { telephone = value; }
}
}
public class WeixinOrderInfoVModel : OrderInfoVModel
{
private string openId = "";
public string OpenId
{
get { return openId; }
set { openId = value; }
}
}
#endregion 前端展现信息
public class ModelBase
{
public override string ToString()
{
List<PropertyInfo> properties = this.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance).ToList();
StringBuilder sb = new StringBuilder();
properties.ForEach(o =>
{
if ((o.PropertyType.IsValueType || o.PropertyType == typeof(string)) && o.CanRead)
{
sb.AppendFormat("{0}:{1}{2}", o.Name, o.GetValue(this, null), Environment.NewLine);
}
});
return sb.ToString();
}
}
初始化数据：
public CustomerInfo GetInitialData()
{
CustomerInfo customerInfo = new CustomerInfo();
customerInfo.Id = Guid.NewGuid();
customerInfo.Name = "zhu";
customerInfo.Orders = new List<OrderInfo>();
Random random = new Random();
List<GoodsInfo> goods = new List<GoodsInfo>();
int goodsCount = random.Next(30) + 10;
for (int i = 0; i < goodsCount; i++)
{
goods.Add(new GoodsInfo()
{
Id = Guid.NewGuid(),
Name = "商品" + i.ToString(),
GoodsType = random.Next(5),
Price = random.Next(200) + 2
});
}
int ordersCount = random.Next(10) + 5;
for (int i = 0; i < ordersCount; i++)
{
if ((i % 2) == 0)
{
customerInfo.Orders.Add(new TelephoneOrderInfo()
{
Telephone = "电话号码：" + i.ToString()
});
}
else
{
customerInfo.Orders.Add(new WeixinOrderInfo()
{
OpenId = "微信号：" + i.ToString()
});
}
}
customerInfo.Orders.ForEach(o =>
{
o.Id = Guid.NewGuid();
o.CreateDate = DateTime.Now.AddDays(random.Next(365));
o.Customer = customerInfo;
o.CustomerId = customerInfo.Id;
o.Name = string.Format("{0}订单{1}", customerInfo.Name, o.CreateDate.ToString("yyyy-MM-dd HH:mm:ss"));
o.OrderItems = new List<OrderItemInfo>();
int orderItemsCount = random.Next(5) + 1;
for (int i = 0; i < orderItemsCount; i++)
{
o.OrderItems.Add(new OrderItemInfo()
{
Count = 1 + random.Next(6),
Id = Guid.NewGuid(),
Goods = goods[random.Next(goods.Count)]
});
o.OrderItems.ForEach(oi =>
{
oi.GoodsId = oi.Goods.Id;
oi.Order = o;
});
}
});
return customerInfo;
}
功能测试：
CustomerInfo customerInfo = GetInitialData();
Mapper.CreateMap<string, int>().ConvertUsing(Convert.ToInt32);
Mapper.CreateMap<string, DateTime>().ConvertUsing(new DateTimeTypeConverter());
Mapper.CreateMap<OrderItemInfo, string>().ConvertUsing(o => o.ToString().Replace(Environment.NewLine, "---"));
Mapper.CreateMap<CustomerInfo, CustomerInfoVModel>();
Mapper.CreateMap<OrderInfo, OrderInfoVModel>()
.Include<TelephoneOrderInfo, TelephoneOrderInfoVModel>()
.Include<WeixinOrderInfo, WeixinOrderInfoVModel>()
.ForMember(o => o.Customer2, d => d.MapFrom(df => df.Customer))
.ForMember(o => o.OrderItemDescs, d => d.MapFrom(df => df.OrderItems))
.ForMember(o => o.Payment, d => d.NullSubstitute("还没有做订单管理"))
.ForMember(o => o.YearMonth, d => d.MapFrom(df => df.CreateDate.ToString("yyyyMM")));
Mapper.CreateMap<TelephoneOrderInfo, TelephoneOrderInfoVModel>()
.ForMember(o => o.Payment, d => d.NullSubstitute("还没有做订单管理"));
Mapper.CreateMap<WeixinOrderInfo, WeixinOrderInfoVModel>()
.ForMember(o => o.Payment, d => d.NullSubstitute("还没有做订单管理"));
/// Mapper.AssertConfigurationIsValid();
txtMsg.Text = "";
StringBuilder sb = new StringBuilder();
sb.AppendLine("扁平映射");
OrderInfoVModel vModel = Mapper.Map<OrderInfo, OrderInfoVModel>(customerInfo.Orders[3]);
sb.AppendLine(vModel.ToString());
sb.AppendLine("嵌套映射");
sb.AppendLine(vModel.Customer2.ToString());
sb.AppendLine("自定义转换器映射");
sb.AppendLine(string.Join(Environment.NewLine, vModel.OrderItemDescs));
sb.AppendLine("空对象处理");
sb.AppendLine(vModel.Payment);
var orders = Mapper.Map<List<OrderInfo>, List<OrderInfoVModel>>(customerInfo.Orders);
orders.ForEach(o => sb.AppendLine(o.ToString()));
DataTable dt = new DataTable();
dt.Columns.Add("Id", typeof(Guid));
dt.Columns.Add("Name");
for (int i = 0; i < 10; i++)
{
DataRow dr = dt.NewRow();
dr["Id"] = Guid.NewGuid();
dr["Name"] = "姓名" + i.ToString();
dt.Rows.Add(dr);
}
List<CustomerInfoVModel> customers = Mapper.DynamicMap<List<CustomerInfoVModel>>(dt.CreateDataReader());
sb.AppendLine("DynamicMap动态映射处理");
customers.ForEach(o => sb.AppendLine(o.ToString()));
txtMsg.Text = sb.ToString();
映射类
public class DateTimeTypeConverter : ITypeConverter<string, DateTime>
{
public DateTime Convert(ResolutionContext context)
{
return System.Convert.ToDateTime(context.SourceValue);
}
}
原文：http://www.cnblogs.com/csandroid/p/3916876.html