C# reflection: GetProperties() with BindingFlags.DeclaredOnly

Question

Hi,

If I use

sometype.GetProperties();

I get all of the properties from the type and it's parent. However I only want to retrieve the properties defined explicitly in this type (not the parents). I though that was what the BindingFlags.DeclaredOnly option was for. However, when I try this:

sometype.GetProperties(BindingFlags.DeclaredOnly);

...I get 0 properties.

Anyone know what I am doing wrong?

Thanks!

Answer 1

According to Microsoft:

• You must specify either BindingFlags.Instance or BindingFlags.Static in order to get a return.
• Specify BindingFlags.Public to include public methods in the search.
• Specify BindingFlags.NonPublic to include non-public methods (that is, private, internal, and protected methods) in the search. Only protected and internal methods on base classes are returned; private methods on base classes are not returned.
• Specify BindingFlags.FlattenHierarchy to include public and protected static members up the hierarchy; private static members in inherited classes are not included.

Answer 2

You need to expand your BindingsFlag a bit. They need to at least include what accessibility and instance vs. static in order to get anything meaningful back.

I think what you are actually looking for is the following

var flags = BindingFlags.DeclaredOnly 
  | BindingFlags.Intstance
  | BindingFlags.Public;
someType.GetProperties(flags);

Answer 3

If you specify any BindingFlags, then you need to specify explicitly what you want properties you want to get. For example:

sometype.GetProperties (BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.Instance);