Question

I am having trouble getting a nested objects properties. For the example I am working with, I have 2 Classes:

public class user 
{
  public int _user_id {get; set;}
  public string name {get; set;}
  public category {get; set;}
}

public class category 
{
  public int category_id {get; set;}
  public string name {get; set;}
}

Simple enough there, and if I reflect either one of them, I get the proper sets of GetProperties(), for example, if I do this:

PropertyInfo[] props = new user().GetType().GetProperties();

I will get the properties user_id, name and category, and if I do this:

PropertyInfo[] props = new category().GetType().GetProperties();

I will get the properties category_id and category; this works just fine. But, this is where I get confused…

As you can see, category is the last property of user, if I do this

//this gets me the Type 'category'
Type type = new user().GetType().GetProperties().Last().PropertyType;
//in the debugger, I get "type {Name='category', FullName='category'}"
//so I assume this is the proper type, but when I run this:
PropertyInfo[] props = type.GetType().GetProperties();
//I get a huge collection of 57 properties

Any idea where I am screwing up? Can this be done?

Answer 1

By doing type.GetType() you are getting typeof(Type), not the property type.

Just do

PropertyInfo[] props = type.GetProperties();

to get the properties which you want.

However, you should look up properties by their name and not by their order, because the order is not guaranteed to be as you expect it (see documentation):

The GetProperties method does not
return properties in a particular
order, such as alphabetical or
declaration order. Your code must not
depend on the order in which
properties are returned, because that
order varies.