Find a private interface field with Reflection?

Question

Given this class

public partial class Default : Page
{
    private IRepository repo;
    ...
}

I want to find and set the private repo field. Is that possible?

UPDATE

I tried using the GetFields(BindingFlags.NonPublic), it returns {System.Reflection.FieldInfo[0]}.

I tried using the GetFields(BindingFlags.NonPublic | BindingFlags.Instance), it returns all the fields of the Page but not repo.

score 3 · Accepted Answer · edited Feb 04 '20 at 15:07

3

Use the GetFields overload that allows you to specify flags:

GetFields(BindingFlags.NonPublic | BindingFlags.Instance)

edited Feb 04 '20 at 15:07

DerApe

answered Nov 11 '09 at 07:55

Kent Boogaart

1

I've taken the liberty of adding BindingFlags.Instance. If you specify no flags you get (BindingFlags.Public | BindingFlags.Instance), but if you specify any you get only the ones you specify, so you need either Instance or Static to get any results. – Greg Beech Nov 11 '09 at 08:52
Don't forget that it will only return the fields for the current type, you may have to walk down the hierarchy if the field is defined in a base class. – Jb Evain Nov 11 '09 at 10:57
Jb Evain: When I change 'repo' to public it does work, just when I change it to private it doesn't appear. – CD.. Nov 11 '09 at 12:00

score 0 · Answer 2 · answered Nov 16 '09 at 14:45

0

you can use the following code :

MemberInfo[] mi = System.Runtime.Serialization.FormatterServices.GetSerializableMembers(MyType);

and convert FieldInfo fi = (FieldInfo) mi[i]; this code return Serializable Members (privates)

answered Nov 16 '09 at 14:45

For using your solution my page needs to be Serializable, is this the only way?? – CD.. Nov 18 '09 at 08:01
yes, I think there are another way, it's using debugging service like Quick Watch in Visual Studio, but you need the .pdb files – Dec 11 '09 at 13:19