PropertyInfo.GetValue() - how do you index into a generic parameter using reflection in C#?

Question

This (shortened) code..

for (int i = 0; i < count; i++)
{
    object obj = propertyInfo.GetValue(Tcurrent, new object[] { i });
}

.. is

Answer 1

Reflection only works on one level at a time.

You're trying to index into the property, that's wrong.

Instead, read the value of the property, and the object you get back, that's the object you need to index into.

Here's an example:

using System;
using System.Collections.Generic;
using System.Reflection;

namespace DemoApp
{
    public class TestClass
    {
        public List Values { get; private set; }

        public TestClass()
        {
            Values = new List();
            Values.Add(10);
        }
    }

    class Program
    {
        static void Main()
        {
            TestClass tc = new TestClass();

            PropertyInfo pi1 = tc.GetType().GetProperty("Values");
            Object collection = pi1.GetValue(tc, null);

            // note that there's no checking here that the object really
            // is a collection and thus really has the attribute
            String indexerName = ((DefaultMemberAttribute)collection.GetType()
                .GetCustomAttributes(typeof(DefaultMemberAttribute),
                 true)[0]).MemberName;
            PropertyInfo pi2 = collection.GetType().GetProperty(indexerName);
            Object value = pi2.GetValue(collection, new Object[] { 0 });

            Console.Out.WriteLine("tc.Values[0]: " + value);
            Console.In.ReadLine();
        }
    }
}