c#反思问题

Question

我出于某种原因试图使用反射,我遇到了这个问题.

class Service
{
    public int ID {get; set;}
    .
    .
    .
}

class CustomService
{
    public Service srv {get; set;}
    .
    .
    .
}

//main code

Type type = Type.GetType(typeof(CustomService).ToString());
PropertyInfo pinf = type.GetProperty("Service.ID"); // returns null

我的问题是我想在主要对象的另一个属性中获得一个属性.有这个目标的简单方法吗？

提前致谢.

Answer 1

您需要首先获得对该srv属性的引用,然后ID:

class Program
{
    class Service 
    { 
        public int ID { get; set; } 
    }

    class CustomService 
    { 
        public Service srv { get; set; } 
    }

    static void Main(string[] args)
    {
        var serviceProp = typeof(CustomService).GetProperty("srv");
        var idProp = serviceProp.PropertyType.GetProperty("ID");

        var service = new CustomService
        {
            srv = new Service { ID = 5 }
        };

        var srvValue = serviceProp.GetValue(service, null);
        var idValue = (int)idProp.GetValue(srvValue, null);
        Console.WriteLine(idValue);
    }
}