Reflection: MissingMethodExcpetion

Hi,

I am using WPF propertygrid to edit an instance of a object, which i had created with reflection.

To create the instance i used "Activator.CreateInstance......."

With the nice programm "Reflector" i saw, that my dynamic loaded assembly has an attribute with virtual getter and setter.

Therefore i think, my programm crashs, when i add the instance to the selectedobject property of the propertygrid.

A part of the exception is no following:

System.Reflection.TargetInvocationException wurde nicht behandelt.
  Message="Der Eigenschaftenaccessor HighBusLoad für das xxxxxxxxxxxx-Objekt hat folgende Ausnahme verursacht: Methode nicht gefunden: \"Int32 xxxxxxxxxxxx.getSignal(Int32, Int32)\"."
  Source="System"
  StackTrace:
       bei System.ComponentModel.ReflectPropertyDescriptor.GetValue(Object component)
       bei #c.#Vl.GetValue(Object obj, BindingFlags invokeAttr, Binder binder, Object[] index, CultureInfo culture)
       bei Mindscape.WpfPropertyGrid.PropertyNode.get_Value()
       bei Mindscape.WpfPropertyGrid.BuiltInEditor.#3(Node node, Boolean editable)
       bei Mindscape.WpfPropertyGrid.BuiltInEditor.GetEditSettings(Node node)
       bei Mindscape.WpfPropertyGrid.BuiltInEditor.CanEdit(Node node)
       bei Mindscape.WpfPropertyGrid.ObjectWrappingEditor.BuildTemplate(Node node)
       bei Mindscape.WpfPropertyGrid.EditorSelector.SelectTemplate(Object item, DependencyObject container)

InnerException: System.MissingMethodException
       Message="Methode nicht gefunden: \"Int32 xxxxxxxxxxxx.getSignal(Int32, Int32)\"."
       Source="xxxxxxxxxxxx"
       StackTrace:
            bei xxxxxxxxxxxx.get_HighBusLoad()
       InnerException:

My question is, is it possible to say to the propertygrid to which attributes are allowed and in my position this special kind is not allowed.

thanks,

tom

There shouldn't be a problem with virtual getters and setters, nor with dynamically created types.  I noticed that the MissingMethodException was referring to the getSignal method rather than the HighBusLoad getter; is it possible that your reflection code didn't emit getSignal?

However, in answer to your specific question, the simplest way to exclude properties from the grid is to apply BrowsableAttribute(false).

Hi ivan,

thanks for your answer.

[quote user="ivan"]

However, in answer to your specific question, the simplest way to exclude properties from the grid is to apply BrowsableAttribute(false).

[/quote] 

it was very usefully for me.

i checked one more time the assembly and saw that i used a old version. now, with the new version the propertygrid works very well. thanks a lot to the developer team.

kind greetings

tom