Getting all object properties with an associated type converter

[Guest]

Hi
I have a class which has its own type converter that adds some additional
properties using overridden GetPropertiesSupported and GetProperties methods.
All works fine if an instance of the class is set as the selected object in
a property grid. However in code I would like to make a call such as
myclassInstance.GetType().GetProperties() which returns all the properties
including the ones added via the associated type converter. Currently I only
get the properties "hard-wired" in the class. Is such a thing possible?

Thanks for any help anyone can provide.

Marek

 

[Linda Liu [MSFT]]

Hi Marek,

When the Type.GetProperties method is called, system will get the
properties of the specified type through reflection, which means only the
inherent properties contained in the meta data of the type are returned.

A simple workaround to your problem is to call the GetProperties method
within the type converter explicitly. The following is a sample. It
requires that you pass an instance of your class to the GetProperties
method.

PropertyDescriptorCollection pdc =
TypeDescriptor.GetConverter(typeof(YourClass)).GetProperties(instanceofyourc
lass);

In fact, a common usage to extend the meta data of a type is to implement
Interface ICustomTypeDescriptor or add a custom TypeDescriptionProvider for
the type. After doing that, call the following statements to get what you
want:

// if you implement ICustomTypeDescriptor for the type, or add a custom
TypeDescriptionProvider on the type
PropertyDescriptorCollection pdc
=TypeDescriptor.GetProperties(instanceofyourclass);

// if you add a custom TypeDescriptionProvider on the type
PropertyDescriptorCollection pdc
=TypeDescriptor.GetProperties(typeof(YourClass));

Hope this helps.
If you have any question, please feel free to let me know.


Sincerely,
Linda Liu
Microsoft Online Community Support

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[Guest]

Hi Linda
That did the trick. Thank you very much.

Marek