How to get properties of a control

[John]

Hi

I am using the below code to get properties and then sub properties on an
object;

Dim Prop As PropertyDescrip tor
Dim Props As PropertyDescrip torCollection

Props = TypeDescriptor. GetProperties(C trl)

For Each Prop In Props
Dim PropObject As Object = Prop.GetValue(C trl)
Dim converter As TypeConverter = TypeDescriptor. GetConverter(Pr opObject)
...
Next

Unfortunately the PropObject comes out as nothing for Ctrl =
{System.Windows .Forms.BindingN avigator}on line Dim PropObject As Object =
Prop.GetValue(C trl) and this gives 'System.Argumen tException was unhandled'
error on the line Dim converter As TypeConverter =
TypeDescriptor. GetConverter(Pr opObject). How can I get round this problem?
The value of prop when this error came as per watch is given below.

Thanks

Regards

- Prop {System.Compone ntModel.Reflect PropertyDescrip tor}
System.Componen tModel.Property Descriptor
+ System.Componen tModel.ReflectP ropertyDescript or
{System.Compone ntModel.Reflect PropertyDescrip tor}
System.Componen tModel.ReflectP ropertyDescript or
+ Attributes {System.Compone ntModel.Attribu teCollection}
System.Componen tModel.Attribut eCollection
Category "Behavior" String
+ ComponentType {Name = "Control" FullName =
"System.Windows .Forms.Control" } System.Type
+ Converter {System.Compone ntModel.Compone ntConverter}
System.Componen tModel.TypeConv erter
Description "The shortcut menu to display when the user right-clicks the
control." String
DesignTimeOnly False Boolean
DisplayName "ContextMenuStr ip" String
IsBrowsable True Boolean
IsLocalizable False Boolean
IsReadOnly False Boolean
Name "ContextMenuStr ip" String
+ PropertyType {Name = "ContextMenuStr ip" FullName =
"System.Windows .Forms.ContextM enuStrip"} System.Type
SerializationVi sibility Visible {1}
System.Componen tModel.Designer SerializationVi sibility
SupportsChangeE vents True Boolean

[Marc Gravell]

Actually, for a converter you should really ask the property itself
(since it can be set against a property using the
TypeConverterAt tribute); as such, you should be using (if I can
remember VB syntax):

Dim converter As TypeConverter = Prop.Converter;

If no TypeConverterAt tribute is set (for Prop), then this will
automatically use Prop.PropertyTy pe to get a converter for the type
(rather than the instance). In short: it should work, even for null
values.

Marc