Modifying custom Iproperties in C#

[navbor]

Hello All,

I am using some code from the June 2010 "Mod the machine" posted by Brian Erkins.

I keep getting an error in C# (express 2010), Please see attached screen dump.

I don't see any obvious difference in my code when compared to Brian's (in fact at one point I copied and pasted his code and still had the same error). Has something changed in the object model, or am i simply doing something stupid?

Please could someone give me some pointers. I am a newbie, trying to learn and am a little stumped with this so any assistance would be much appreciated.

Here is the code:

private void button1_Click(object sender, EventArgs e)        

{            

Inventor.Application invApp = null;            

invApp = (Inventor.Application)System.Runtime.InteropServices.Marshal.GetActiveObject("Inventor.Application");

Inventor.Document doc = invApp.ActiveDocument;            

Inventor.PropertySet customPropSet;            

customPropSet = doc.PropertySets["Inventor User Defined Properties"]; 

.............

.............

Thanks Rob

[xiaodong_liang]

Hi,

Sorry, I was a little rash replying just now. Actually the string of the property set name is correct. You are using its Display Name.

After checking the snapshot, I think the problem is no any document is opened. So ActiveDocument is null. Could you give a check?

Again, I suggest looking for propertyset by its internal name which is not localized.