How to get surface boundary when imported from LandXML using .NET API

[vucic_tamara]

Hello,

I have few surfaces in the drawing that are imported from LandXML format. Now I need to write a piece of code in C# that iterates through surfaces and then gets surface borders to do some calculations on them. But the problem is that whatever method I seem to use I get no borders from them. This is what I tried so far:

var boundariesDef = surface.BoundariesDefinition;

var borderObjectIds1 = surface.ExtractBorder(SurfaceExtractionSettingsType.Plan);
var borderObjectIds2 = surface.ExtractBorder(SurfaceExtractionSettingsType.Model);
var dbcol = new DBObjectCollection();
surface.Explode(dbcol);

And all of the collections are empty.

If anyone can give any hint on what to do to get the borders it would be great!

Thank you,

Tamara

[Jeff_M]

Can you share the dwg and testable code? I just ran a quick test here and the border extracts as expected.

[vucic_tamara · Accepted solution]

Hi Jeff,

When I prepared a test drawing and extracted sample code as you asked I ran my sample code and everything turned out to work perfect.  All of the methods stated above were returning boundary objects.

Then I started to compare what was different between my original code and the one I prepared as a sample to send you.

I noticed one thing different - I was calling my methods in original code from UI thread, and in my sample code I was calling it via CommandMethod. 

And the important thing I noticed is that I didn't wrap my Civil related code in DocumentLock using statement when calling from UI thread. 

After I wrapped my code like this everything seems to be working right:

var doc = ACApplication.DocumentManager.MdiActiveDocument;
using(var dockLock = doc.LockDocument())
{
//Do my surface calculations
}

Now it is working so I hope this was the problem. Thank you very much, if you weren't asking for example I would have never figured it.

Greetings,

Tamara

[Jeff_M]

Glad I was able to help in some way! Thanks for posting your findings.