Properties with subproperties in propertygrid?

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Kingherc - 28 Mar 2006 08:09 GMT

Hi to all,

In a .net 2.0 program, I'm trying to use the property grid. When the
property grid displays an object, it successfully displays its properties.
What I'd like to ask is: How can I make a property to have "sub-properties"
on the propertygrid? Something like (Application Settings) that is displayed
when WindowsForm Controls are selected or something like Font which has
subproperties ('size', 'face', 'color' etc.).

Thanks for any help!

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Stoitcho Goutsev (100) - 28 Mar 2006 15:05 GMT

Kingherc,

The easiest way is to attribute the type or property with
ExpandableObjectConverter.
Normally you create your own conveter that derives from this type.

[TypeConverter(MyTypeExpandableConverter)]
MyType Prop
{
....
}

Normally in the converter class you need to override couple of methods in
order to convert from/to string.

Signature

HTH
Stoitcho Goutsev (100)

> Hi to all,
>
[quoted text clipped - 8 lines]
>
> Thanks for any help!

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Torbjørn - 04 Apr 2006 07:38 GMT

Hi,

I tried doing the same thing for displaying a custom class derived from
ApplicationSettingsBase (called EngineSettings). EngineSettings again
contained another class derived from ApplicationSettingsBase (called
GroupSettings).

By using the default ExpandableObjectConverter for the GroupSettings class I
have been unable to expand the GroupSettings property of EngineSettings when
displayed in a propertygrid.

If EngineSettings does not inherit from ApplicationSettingsBase, the
GroupSettings property DOES expand, but not when it inherits from it.

Does my GroupSettings class HAVE to have a custom TypeConverter? Is it not
possible to use the ExpandableObjectConverter?

Thanks!

-Torbjørn

> Kingherc,
>
[quoted text clipped - 23 lines]
> >
> > Thanks for any help!

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Torbjørn - 04 Apr 2006 08:19 GMT

Hi again,

I finally figured out my problem: I had forgotten to do "new" on my custom
settings, since (of course) ApplicationSettingsBase does not do that for you.

Cheers,
Torbjørn

> Hi,
>
[quoted text clipped - 44 lines]
> > >
> > > Thanks for any help!

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Properties with subproperties in propertygrid?

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