Structured bill of material returns just the top level assembly

[Anonymous]

Hi

I'm working on a standalone C# program that uses Inventor Apprentice API. It opens the top level assembly, loops through its BOM rows in Structured View and displays them in a DataGridView.

For a couple of assemblies, the BOMRowsCount (in the below code) is just 1 ( the top-level assembly), whereas if I change the BOMViewType to 'Model Data' or 'Parts Only', it shows up all the BOMRows.

When I open the Structured View tab of Bill of Materials of that assembly in Inventor UI, I can see all the parts & subassemblies listed. But the API fails to retrieve the BOMRows and it doens't throw any exception either.

I don't know what's special/wrong about these assemblies or there is a better way of implementation.

I'm not very familiar with Inventor APIs, any help on better understanding of this behaviour is appreciated.

var assemblyDoc = inventor.Open(assemblyPath);
var components = (Inventor.AssemblyComponentDefinition)assemblyDoc.ComponentDefinition;
Inventor.BOMView structuredView = null;
try
{
structuredView = components.BOM.BOMViews
.Cast<Inventor.BOMView>()
.Single(view => view.ViewType == Inventor.BOMViewTypeEnum.kStructuredBOMViewType);
var BOMRowsCount = structuredView.BOMRows.Count;
}

catch (InvalidOperationException x)
{
// If zero or more than one structured BOM was found.
throw new InventorStructuredBomException(x);
}

Thanks

Rekha.

[MechMachineMan]

You are missing some lines to set the properties of the BOM object.

See documentation here:

http://help.autodesk.com/view/INVNTOR/2018/ENU/?guid=GUID-5E4217C6-FCE6-4006-9232-ACC42372A688

or example in vb.net, but it should get you sorted out:

Sub FetchActiveDocBOM(oXLFileName As String, oExportSheetName As String) 
    On Error Resume Next
    
    
    Dim oBOM As BOM
    oBOM = invDoc.ComponentDefinition.BOM

    Call oBOM.ImportBOMCustomization("Z:\Python\Engineers folder\Justin\iLogic\BOM_Style.xml")

    oBOM.StructuredViewFirstLevelOnly = False
    oBOM.StructuredViewEnabled = True
 	oBOM.PartsOnlyViewEnabled = True
	
    Dim oStructuredBOMView
    oStructuredBOMView = oBOM.BOMViews.Item("Structured")
    Call oStructuredBOMView.Sort("Part Number", True)
	Call oStructuredBOMView.Renumber(1,1,)
	
    Call oStructuredBOMView.Export(oXLFileName, 74498, oExportSheetName)
   
    If Err.Number <> 0 Then
        MsgBox ("Error Opening/Exporting!: " & Err.Number & " :: " & Err.Description)
    End If
End Sub

[Anonymous]

Thanks for your reply Justin.

I'm not able to set these properties, I guess its because I'm using the apprentice API which has limited features (mostly read-only).

But I checked these properties on the assembly, they already have the expected values - 

StructuredViewFirstLevelOnly - False

StructuredViewEnabled - True

PartsOnlyViewEnabled - True

[Anonymous]

Has anyone else encountered this issue before? Any help would be appreciated.

Thanks

Rekha.