为什么不能用Reflection创建自己的自动转换?你可以做一些事情来的
class Program {
static void Main(string[] args)
{
Source item1 = new Source(2, 3, 4);
Destination item2 = new Destination(item1, ContinueCopy);
Console.WriteLine(string.Format("X: {0}\n Y: {1}", item2.X, item2.Y));
Console.ReadKey();
}
public static bool ContinueCopy(string name, Type type)
{
if (name == "X" && type == typeof(int)) return false;
return true;
}
}
public class Source {
public Source() { }
public Source(int x, int y, int z)
{
myX = x;
myY = y;
myZ = z;
}
private int myX;
public int X
{
get { return myX; }
set { myX = value; }
}
private int myY;
public int Y
{
get { return myY; }
set { myY = value; }
}
private int myZ;
public int Z
{
get { return myZ; }
set { myZ = value; }
}
}
public class Destination {
public delegate bool ContinueCopyCallback(string propertyName, Type propertyType);
public Destination() : this(0,0) { }
public Destination(int x, int y)
{
myX = x;
myY = y;
}
public Destination(Source copy) : this(copy, null) { }
public Destination(Source copy, ContinueCopyCallback callback)
{
foreach (PropertyInfo pi in copy.GetType().GetProperties())
{
PropertyInfo pi2 = this.GetType().GetProperty(pi.Name);
if ((callback == null || (callback != null && callback(pi.Name,
pi.PropertyType))) && pi2 != null && pi2.GetType() == pi.GetType())
{
pi2.SetValue(this, pi.GetValue(copy, null), null);
}
}
}
private int myX;
public int X
{
get { return myX; }
set { myX = value; }
}
private int myY;
public int Y
{
get { return myY; }
set { myY = value; }
}
}
调输出将给item2.X值2和item2.Y的3
值时,也可以提供有一个回调的能力,这可以让您对不希望自动复制的属性名称进行自定义过滤。您也可以将复制代码编写为接受Source作为参数的Destination的浅拷贝构造函数。
这是一种轻量级的方法,因为您的需求非常简单。