Get Density from iProperties

[SharkDesign]

How do I read the current value in the Density box of the iProperties?

Thanks

[WCrihfield · Accepted solution]

Hi @SharkDesign.

I believe the 'Density' iProperty is Item# 42 in the 'Design Tracking Properties' iProperty set.

So either:

iProperties.Value("Project", "Density")

or

ThisDoc.Document.PropertySets.Item("Design Tracking Properties").Item("Density").Value

or

ThisDoc.Document.PropertySets(3).Item(42).Value

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[SharkDesign]

As simple as that. 

So confusing when it's not on the 'Project tab' and everything else on the physical tab is:

iproperties.mass

iproperties.volume

[WCrihfield]

To take it another step.   I noticed that the Mass and Volume are in 'document units', but the Density shown in on the Physical tab of the iProperties and returned by the iProperty is in grams per centimeters cubed units (database units I suspect).  So, since I use Inches (in) & Pounds (lbmass), I'm expecting the Density to be in pounds per inches cubed (lbmass/in^3).  In order to get that, I do the math using the two given values, which are already in document units.

Dim oD As Double = (iProperties.Mass / iProperties.Volume)
'or
'oD = (CDbl(iProperties.Mass) / CDbl(iProperties.Volume))
MsgBox("Density = " & oD, , "")

When working with iProperties directly, the value's data type isn't pre-defined, so you sometimes have to help it along by specifying the data type you are expecting, or the stuff you are trying to do with it might fail.  This routine returns the Density value in the units I'm expecting.  It's an odd situation there.  In the 'Document Settings' dialog > Units tab, you can specify Length, Angle, Time, & Mass units, but not Area, Density, and other measurable unit types.