toggle ref plane visibility

[paul]

I'm attempting to create an external command to toggle the visibility of reference planes on and off, but can't seem to get it right.

If noticed there is no built-in category for reference planes. So I used the following code instead:

Autodesk.Revit.Elements.ReferencePlane rp = new Autodesk.Revit.Elements.ReferencePlane();
Category cat = rp.Category;

However on the last I line I get an error like this:

System.AccessViolationException: Attempted to read or write protected memory.

I'm guessing it's because the 'Category' property is part of the derived Element class and not part of the ReferencePlane class itself, but I can't seem to find a way to specify the reference plane category.

Any ideas?

[michaelhodges]

did you figure it out?

I'd love a toggle keyboard shortcut to view and hide ref planes.

[krispy]

BuiltInCategory is OST_CLines

[mertens3d]

I was able to get this in some code I wrote. If i reme....ah heck...let me go find it and cut and past...hang on.

 Public Sub toggleOneCategory(ByVal catName As String)

        Dim oneCat As Autodesk.Revit.DB.Category


        Dim aView As Autodesk.Revit.DB.View

        Dim docTransaction As New Autodesk.Revit.DB.Transaction(ptrToDoc)

        aView = ptrToDoc.ActiveView


        For Each oneCat In ptrToDoc.Settings.Categories

            If oneCat.Name = catName Then

                'Dim dog As String = ""
                Try
                    docTransaction.SetName("stg - quickToggle")


                    docTransaction.Start()
                    Dim oldVis As Boolean
                    oldVis = aView.getVisibility(oneCat)

                    aView.setVisibility(oneCat, Not oldVis)

                    docTransaction.Commit()



                Catch ex As Exception
                    MsgBox(ex.ToString)

                End Try

            End If

        Next
    End Sub

Using a built in category is probably better, but similar idea.

[mertens3d]

lol...oh...and i've since learned from Jeremy that wrapping this sub/function in a try/catch is not good coding.

Additionally, if i should probably have exited the for loop, once found.

i'm learning. 🙂