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示例类:如何确定表达式成员是否属于集合类型,然后迭代该集合?
public class Procedure: SomeBaseClass
{
public Guid Id {get;set;}
public ICollection<Task> Tasks {get;set;}
}
public class Task: SomeBaseClass
{
public Guid Id {get;set;}
public string Name {get;set;}
}
方法采取在表达colelction:
public viod DoSomethingWithProperties<T>(Guid enittyId, params Expression<Func<TEntity, object>>[] propertiesToDoStuffWith) where T: SomeBaseClass
{
var item = someService<T>().FindById(entityId);
.......
foreach(var expression in propertiesToDoStuffWith)
{
///I need to iterate the propertiesToDetach and determine if the property is a collection so I can perform operations on each item.
}
}
我可以这样称呼它:
DoSomethingWithProperties<Procedure>(1111-1111-1111-1111-1111,p => p.tasks);
这听起来像你想使用普通的委托,而不是表达式树。 – SLaks 2012-02-23 16:37:09
不应该是'foreach(var表达式在propertiesToDoStuffWith(item))'? – 2012-02-23 16:37:34
@ChrisShain,我想你是对的。我唯一的问题是表达式是该类型的属性数组。我仍然想要投射表达树吗?我在想是的,但那会起作用吗? – DDiVita 2012-02-23 17:30:34