Change representation of array in PropertyGrid

Question

The last property is an array of structures. I achieve correct representation by overriding the ToString of structures, but it is impossible to override the ToString of an array. I try to use TypeConverter it works but the property becomes non-expandable.

This is TypeConverter:

Public Class StringViewArrayViewConverter
    Inherits CollectionConverter

#Region "Public Methods"

    Public Overrides Function ConvertTo(context As ITypeDescriptorContext,
                                                    culture As CultureInfo,
                                                    value As Object,
                                                    destinationType As Type) As Object
        If TypeOf value Is dpStringView() AndAlso destinationType.Equals(GetType(String)) Then
            Return FormatNumber(CType(value, dpStringView()).Length, 0)
        Else
            Return String.Empty
        End If
    End Function

#End Region

End Class

That used in a next way:

<Category(CategoryInfo)>
<DisplayName("Придатний")>
<TypeConverter(GetType(StringViewArrayViewConverter))>
Public ReadOnly Property SuitabilityDescription As dpStringView()
    Get
        Return Array.ConvertAll(Suitability, Function(i) New dpStringView(GetEnumDescription(i)))
    End Get
End Property

The next picture illustrates PropertyGrid without TypeConverter.

Is it possible to replace dpStrinViev[] Array with some short conclusion from its contents (like "1 message, expand to see details") and leave the property expandable?

Thanks for any advice or examples in VB.NET or C#

Answer 1

I find my mistake: my TypeConverter inherits CollectionConverter instead ArrayConverter.