using System;

using System.Collections.Generic;

using System.Linq;

using System.Reflection;

using System.Text;

using System.Threading.Tasks;

namespace ConsoleApplication1

{

class Program

{

static void Main(string[] args)

{

People p = new People() { Age = 28, name = new Name() { FirstName = "zheng", LastName = "zhiqiang" } };

PeopleDto pDto = new PeopleDto();

pDto = AutoMapping<People, PeopleDto>.Convert(p, pDto);

Console.WriteLine(string.Format("{0} {1} {2}", pDto.Age, pDto.FirstName, pDto.LastName));

Console.Read();

}

}

/// <summary>

///

/// </summary>

/// <typeparam name="T1">entity</typeparam>

/// <typeparam name="T2">dto</typeparam>

public static class AutoMapping<T1, T2>

where T1 : new()

where T2 : new()

{

public static T2 Convert(T1 t1, T2 t2)

{

var dtoPiList = t2.GetType().GetProperties().Where(x => x.PropertyType.IsPublic).ToList();

string name;

object value;

for (int i = 0; i < dtoPiList.Count(); i++)

{

name = dtoPiList[i].Name;

value = GetPropertyValue(t1, name);

if (null == value) continue;

dtoPiList[i].SetValue(t2, value, null);

}

return t2;

}

private static object GetPropertyValue(object t1, string name)

{

Type t = t1.GetType();

PropertyInfo[] pis = t.GetProperties();

//查找当前对象是否包含需要转换的属性

var piTemp = pis.Where(x => x.Name == name).FirstOrDefault();

//不存在递归查询

if (piTemp == null)

{

foreach (PropertyInfo pi in pis)

{

object obj1 = pi.GetValue(t1, null);

object obj2 = GetPropertyValue(obj1, name);

if (obj2 != null) { return obj2; }

}

}

else

{

//判断是否忽略标记

var cAttr = piTemp.GetCustomAttributes();

foreach (var attr in cAttr)

{

var tempAttr = attr as AutoMappingAttributes;

if (tempAttr.Ignore) { return null; }

}

//存在直接返回

return piTemp.GetValue(t1, null);

}

return null;

}

}

public class AutoMappingAttributes : Attribute

{

public bool Ignore { get; set; }

}

public class Name

{

public string FirstName { get; set; }

[AutoMappingAttributes(Ignore = true)]

public string LastName { get; set; }

}

public class People

{

public int Age { get; set; }

public Name name { get; set; }

}

public class NameDto

{

public string FirstName { get; set; }

public string LastName { get; set; }

}

public class PeopleDto

{

public string FirstName { get; set; }

public string LastName { get; set; }

public int Age { get; set; }

}

}