我正在尝试使用ValueInjector来展平一个类,并让它也可以将值从Nullable< int>复制到int.
例如,给出以下(人为)课程:
class CustomerObject
{
public int CustomerID { get; set; }
public string CustomerName { get; set; }
public OrderObject OrderOne { get; set; }
}
class OrderObject
{
public int OrderID { get; set; }
public string OrderName { get; set; }
}
class CustomerDTO
{
public int? CustomerID { get; set; }
public string CustomerName { get; set; }
public int? OrderOneOrderID { get; set; }
public string OrderOneOrderName { get; set; }
}
我想将CustomerObject的实例展平为
一个CustomerDTO,它忽略了CustomerID的事实
和OrderID是不同类型的(一个是可空的,不是).
所以我想这样做:
CustomerObject co = new CustomerObject() { CustomerID = 1, CustomerName = "John Smith" };
co.OrderOne = new OrderObject() { OrderID = 2, OrderName = "test order" };
CustomerDTO customer = new CustomerDTO();
customer.InjectFrom<>(co);
然后填充所有属性,具体为:
customer.CustomerID
customer.OrderOneOrderID
customer.OrderOneOrderName
我意识到我可以使用FlatLoopValueInjection来展平对象,我正在使用这个NullableInjection类:
public class NullableInjection : ConventionInjection
{
protected override bool Match(ConventionInfo c)
{
return c.SourceProp.Name == c.TargetProp.Name &&
(c.SourceProp.Type == c.TargetProp.Type
|| c.SourceProp.Type == Nullable.GetUnderlyingType(c.TargetProp.Type)
|| (Nullable.GetUnderlyingType(c.SourceProp.Type) == c.TargetProp.Type
&& c.SourceProp.Value != null)
);
}
protected override object SetValue(ConventionInfo c)
{
return c.SourceProp.Value;
}
}
基本上我想把两者结合起来.这可能吗?
解决方法:
你可以通过覆盖TypesMatch方法来做到这一点:
public class MyFlatInj : FlatLoopValueInjection
{
protected override bool TypesMatch(Type sourceType, Type targetType)
{
var snt = Nullable.GetUnderlyingType(sourceType);
var tnt = Nullable.GetUnderlyingType(targetType);
return sourceType == targetType
|| sourceType == tnt
|| targetType == snt
|| snt == tnt;
}
}
或者从源代码中获取FlatLoopValueInjection并根据需要进行编辑(大约10行)