[Mono-bugs] [Bug 651556] New: PropertyDescriptor.GetChildProperties(null) returns no properties

[bugzilla_noreply at novell.com]

https://bugzilla.novell.com/show_bug.cgi?id=651556

https://bugzilla.novell.com/show_bug.cgi?id=651556#c0


           Summary: PropertyDescriptor.GetChildProperties(null) returns no
                    properties
    Classification: Mono
           Product: Mono: Class Libraries
           Version: 2.6.x
          Platform: x86
        OS/Version: Windows 7
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: Sys.Core
        AssignedTo: jbevain at novell.com
        ReportedBy: cvolzke at live.com.au
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---
           Blocker: ---


User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US)
AppleWebKit/532.5 (KHTML, like Gecko) Chrome/4.1.249.1036 Safari/532.5

PropertyDescriptor.GetChildProperties(null) should return the properties of
PropertyType, but instead it returns an empty collection.

Reproducible: Always

Steps to Reproduce:
1. Create a data type say
public class Entity
{
    public NestedEntity Property { get; set; }
}
2. Call
TypeDescriptor.GetProperties(typeof(Entity))["Property"].GetChildProperties(null)

Actual Results:  
An empty PropertyDescriptorCollection is returned.

Expected Results:  
The properties of the type of the Property property (ie. the properties of the
NestedEntity type).

Easily fixed, change:

public virtual PropertyDescriptorCollection GetChildProperties (object
instance, Attribute[] filter)
{
    return TypeDescriptor.GetProperties (instance, filter);
}

to

public virtual PropertyDescriptorCollection GetChildProperties (object
instance, Attribute[] filter)
{
    return instance == null ? TypeDescriptor.GetProperties(PropertyType,
filter) : TypeDescriptor.GetProperties(instance, filter);
}

-- 
Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the QA contact for the bug.