RadPropertyGrid custom dropdown editor not changing

[Michael]

Hello,

I've got a custom editor for some PropertyGrid items that is displaying in the grid values correctly, and the subsequent drop down list is appearing correctly, however, when I select a new value, the PropertyStoreItem PropertyChanged event is not firing.

I'm using your RadPropertyGridEditorExample as a template to get started. My data source is IEnumerable<> and not List<>. That's one difference. Other than that, what insights are there what I might be missing?

Edit: I'm also using a Guid for the SelectedValue and not a more primitive type like Int32 (as per the example). Basically, otherwise, I've got the same sort of thing going on, a complex user object not unlike Digit that wraps my Domain Object and exposes value and display name sufficient to facilitate the drop down.

Thank you...

[Michael]

Did a little more digging through the forums. I think I found a plausible workaround through this issue in this post: propertychange-event.

[Michael]

OKAY! Found the answer.

In the code of our EditorInitialized event handler:

var __e_Editor_EditorElement = e.Editor.EditorElement;
__e_Editor_EditorElement.SelectedValue = ((PropertyGridItem) e.Item).Value;

Something like the Digit project example: SelectedValue.GetType() and PropertyGridItem.Value.GetType() were both Int32.

Our example was a little bit different in that the object backing the PropertyStoreItem itself was the complex object and not a primitive. So we ended up with something like typeof(Guid) != typeof(OurObject).

When I exposed a reference to the complex object this reference, this all cleared up and I got the PropertyChanged event from the PropertyStoreItem like I expect.

Hope this helps someone.

[Ivan Petrov]

Hi Michael,

Thank you for writing.

There is a Type check when assigning a value to a PropertyStoreItem. The check ensures that the value coming from the editor can be assigned or converted to the type of the PropertyStoreItem. This is why the event was not firing.

I am glad you have found an answer to your question. If you have further questions, do not hesitate to write back.

Kind regards,
Ivan Petrov
the Telerik team

[Ivajlo]

Do you know somebody how can I use
PropertyStoreItem engineFuel = new PropertyStoreItem(typeof(Fuels), "Fuel", Fuels.Petrol,
                "The type of fuel providing the energy source for the engine.", "Engine");
but instead enum type to be List<ClassName>

Thanks

[Ivan Petrov]

Hello Ivajlo,

Thank you for writing.

Properties of type List<SomeClass> are edited in the property grid using the standard .NET collection editor. However if you would like to edit the list using a finite amount of predefined values you can take a look at the attached project. It uses the editor created in the following article with a few tweaks to make it work in the property grid. It allows users to use a drop down list editor and select multiple items, which are then added to the list.

I hope this will be useful. Should you have further questions, I would be glad to help.
 
Kind regards,
Ivan Petrov
the Telerik team