对象转换对同属性进行赋值

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Reflection;

namespace WebLinq
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

User u = new User();
u.Age = 18;
u.Name = "rhythmk";
Man man = new Man();
SetValue(u, man);
if (man != null)
{
Response.Write(man.Name);

}
else {

Response.Write("NULL");
}
}

public static void SetValue(object oldObj, object newObj)
{
Type oldType = oldObj.GetType();
Type newType = newObj.GetType();

PropertyInfo[] oldObjPropertyInfos = oldType.GetProperties();
for (int i = 0; i < oldObjPropertyInfos.Length; i++)
{
if (oldObjPropertyInfos[i].CanRead)
{
string strPropertyName = oldObjPropertyInfos[i].Name;
object newValue = GetPropertyValue(oldObj, strPropertyName);

if (newValue != null)
SetPropertyValue(newObj, strPropertyName, newValue);
}
}
}

private static void SetPropertyValue(object obj, string strPropertyName, object val)
{
Type t = obj.GetType();
PropertyInfo[] propertyInfos = t.GetProperties();
foreach (PropertyInfo pi in propertyInfos)
{
if (pi.Name == strPropertyName)
{
if (pi.CanWrite)
pi.SetValue(obj, val, null);
}
}
}

private static object GetPropertyValue(object obj, string strPropertyName)
{
Type t = obj.GetType();
PropertyInfo[] propertyInfos = t.GetProperties();
foreach (PropertyInfo pi in propertyInfos)
{
if (pi.Name == strPropertyName)
{
if (pi.CanRead)
return pi.GetValue(obj, null);
}
}
return null;
}
}
}

主要是 避免在项目开发中 比如 Linq to sql 生成的数据类 跟实际的类 之间 进行赋值

而无需去进行

a.property1=b.property1;

a.property2=b.property2;

a.property3=b.property3;