如何获取数组类内部属性的属性类型

时间:2018-03-05 04:10:01

标签: c# propertyinfo

我试图获取数组属性的属性类型

[Serializable]
public class Orders
{
    public long OrderID { get; set; }
    public string CustomerID { get; set; }
    public int EmployeeID { get; set; }
    public double Freight { get; set; }
    public string ShipCountry { get; set; }
    public string ShipCity { get; set; }
    public Customer[] customer {get; set;}
}

public class Customer
{
    public string OtherAddress { get; set; }
    public int CustNum { get; set; }

}

我需要获得 Orders.Customer.OtherAddress Orders.Customer.0.OtherAddress 索引的类型。 dataSource 是订单列表。

Type type = dataSource.GetElementType();

PropertyInfo propInfo = type.GetProperty("Customer");

DefaultMemberAttribute defaultMember = 
(DefaultMemberAttribute)Attribute.GetCustomAttribute(propInfo.PropertyType, 
typeof(DefaultMemberAttribute));
                    propInfo = 
propInfo.PropertyType.GetProperty("CustNum" , new Type[] { 
typeof(int) });

我该怎么办?

2 个答案:

答案 0 :(得分:0)

OP,你的问题不是很清楚......"使用动态数据源"可能意味着很多不同的事情。但是,无论对数据源的引用是强类型对象,动态还是仅对象,引用的对象仍然是某种强类型类。除非由于某种原因您无法设置对其类型库的引用,否则您不需要使用任何反射。最多只需要一个简单的演员。有动力,甚至不需要。

例如,如果您有此界面:

public interface IRepository
{
    dynamic GetListAsDynamic();
    object  GetListAsObject();
}

......以及实现它的类......

public class OrderRepository : IRepository
{
    public dynamic GetListAsDynamic()
    {
        return new List<Order>
        {
            new Order
            {
                customer = new [] {new Customer { OtherAddress = "1234 Foo St" } }
            }
        };
    }
    public object GetListAsObject()
    {
        return new List<Order>
        {
            new Order
            {
                customer = new [] {new Customer { OtherAddress = "1234 Bar St" } }
            }
        };
    }
}

您仍然可以在没有任何反映的情况下访问其他地址:

public class Program
{
    public static void TestDynamic()
    {
        var repo = new OrderRepository();
        var orders = repo.GetListAsDynamic();
        var order = orders[0];
        var customers = order.customer;
        var customer = customers[0];

        Console.WriteLine("And the customer dynamic's other address is.... '{0}'", customer.OtherAddress);
    }

    public static void TestObject()
    {
        var repo = new OrderRepository();
        var orders = repo.GetListAsObject() as List<Order>;
        var order = orders[0];
        var customers = order.customer;
        var customer = customers[0];

        Console.WriteLine("And the customer object's other address is.... '{0}'", customer.OtherAddress);
    }

    public static void Main()
    {
        TestDynamic();
        TestObject();
    }
}

输出:

And the customer dynamic's other address is.... '1234 Foo St'
And the customer object's other address is.... '1234 Bar St'

Working code on DotNetFiddle

答案 1 :(得分:0)

我认为你正在寻找一个&#34;泛型&#34;答案可以应用于其他未知的情况。但是,我不确定你的情况会如何通用/未知。我想出了这个&#34; OtherAddress&#34;但是你仍然需要知道一些字段名称。如果您需要完全通用的方法,则需要更广泛地提取各种属性。调试窗口中列出的类型是字符串。

public void GetTypeInfo()
{
    Orders o = new Orders {customer = new Customer[] {new Customer()}};

    dataSource.Add(o);

    PropertyInfo info1 = dataSource[0].GetType().GetProperty("customer");

    Array c = (Array) info1.GetValue(dataSource[0], null);

    Type info2 = c.GetValue(0).GetType();

    PropertyInfo info3 = info2.GetProperty("OtherAddress");

    Debug.WriteLine("type| " + info3.PropertyType.Name);
}