Navisworks API

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Distinguished Contributor
bthatcher
Posts: 747
Registered: ‎12-12-2003
Message 1 of 2 (129 Views)

item.Parent.Model.RootItem

129 Views, 1 Replies
01-18-2013 10:00 AM

I have a selected modelitem and i'm trying to get the model that it is in and add it to a modelitemcollection.

 

foreach (ModelItem item in selectedItems)
{                    
   collection.Add(item.Parent.Model.RootItem);
}

 I am getting the error "Object reference not set to instance of object". How can I acomplish this? Thanks.

Active Contributor
ngombault
Posts: 45
Registered: ‎11-14-2012
Message 2 of 2 (121 Views)

Re: item.Parent.Model.RootItem

01-20-2013 02:20 PM in reply to: bthatcher

Hi,

 

Have you tried using the AppInfo tool from Navisworks sample code? this wouls help you find out what is thowing the error. So far I have 2 guesses:

 

First, is your collection initialized? (new collection)

 

Second, only the RootItem has a value for the Model property: RootItem.Model; so if your item is a 1st level child of the RootItem, then you can access this property with Item.Parent.Model; but if your item is a N-th level children then you need to call the parent method N-times: Item.Parent.Parent.Parent.....Model.


You may need a recursive method.

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