What Event Should Be Used to Expand an Item

[Paul]

I couldn't find a property to set that will always expand all property grid items, so now I'm trying to expand just one item when the property grid is loaded. I tried putting the Expand() call in the CreateItem event handler, but the item is always null. If I put the Expand() call in the ItemFormatting event handler, I am unable to collapse the item. Here is the code I'm using:

PropertyGridItem item = e.Item as PropertyGridItem;

if (item.Label == "abc" && !item.Expanded)

{

    item.Expand();

}

[Stefan]

Hello Paul,

Thank you for writing.

There is a method that you can call during the OnLoad event of the form to expand all items in RadPropertyGrid:

radPropertyGrid1.ExpandAllGridItems();

This will expand all items in the control and the user will be able to collapsed them if needed.

I hope that you find this information useful.
 
Regards,
Stefan
Telerik

[Stevens]

Asking How to Expand a single item, not All.

[Stefan]

Hi,

You mentioned that you find a way how to expand all the items, so I gave you how to do it.

To expand item, the PropertyGridItem type, has method which will expand the item if it is expandable. There is also Expanded property which you can set and which does the same.

If you want to expand only certain items, you can do that by using the SelectedObjectChanged event. 

private void RadPropertyGrid1_SelectedObjectChanged(object sender, PropertyGridSelectedObjectChangedEventArgs e)
{
    radPropertyGrid1.Items[5].Expand();
}

Once you assign the SelectedObject property of the control, this event will get triggered, and you will have access to the Items, from where you can expand the desired ones.

I hope that you find this information useful. Should you have any other questions, do not hesitate to contact us.

Regards,
Stefan
Telerik