Passing objects to a UITypeEditor

Answer 1

In the EditValue method, you are given a context. Use context.Instance to access the object that holds your property. This object should also contain a property that gives you access to the list of things you want to display. You could test if context.Instance is ITextureProvider for example, then cast it and access the textures. Not sure if this makes sense in your design but let me know.

Answer 2

As an alternative you can try the following approach. I find it very elegant, because it does not require to store a list of available property values in the object. Therefore, for example, you can show one set of values on one form and another set on another.

1. Create an interface IYourDataProviderService.
2. Create an implementation of IYourDataProviderService, which knows the concrete data to provide.
3. Create a class implementing ISite. In GetService() method return an instance of class which implements IYourDataProviderService, if the serviceType parameter is typeof(IYourDataProviderService). I left rest of ISite methods throwing NotImplementedException (except DesignMode property) and for me it worked, but probably this is not an ideal solution.
4. In 'Load' event handler assign your implementation to the Site property of your propertygrid.
5. Enjoy!