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Get Tangent Edges of Bendlines (C#)

This example shows how to get each bendline's visible tangent edges in a flat-pattern view in a drawing of a sheet metal part.


// Preconditions:

// 1. Open a SOLIDWORKS drawing that has a flat-pattern

//    view of a sheet metal part that has bend lines

//    with tangent edges.

// 2. Run the macro and examine the Immediate window

//    and the drawing document to verify the results.


// Postconditions: None


using SolidWorks.Interop.sldworks;

using SolidWorks.Interop.swconst;

using System;

using System.Diagnostics;

namespace GetBendlinesTangentEdges_CSharp.csproj


    partial class SolidWorksMacro


        public void Main()


            ModelDoc2 swModel = default(ModelDoc2);

            DrawingDoc swDrawing = default(DrawingDoc);

            Sheet swSheet = default(Sheet);

            View swView = default(View);

            long nbrBendlines = 0;

            object[] BendlinesArr = null;

            long nbrRelatedTangentEdges = 0;

            object RelatedTangentEdgesArr = null;

            long i = 0;

            SketchSegment swSketchSegment = default(SketchSegment);

            swModel = (ModelDoc2)swApp.ActiveDoc;

            swDrawing = (DrawingDoc)swModel;

            // Get drawing sheet

            swSheet = (Sheet)swDrawing.GetCurrentSheet();

            // Get name of drawing sheet

            Debug.Print("Name of drawing sheet: " + swSheet.GetName());

            // Get number of views on drawing sheet

            Debug.Print(" Number of drawing views on drawing sheet: " + swDrawing.GetViewCount());

            // First view is the current drawing sheet

            swView = (View)swDrawing.GetFirstView();

            Debug.Print(" First drawing view is the current drawing sheet, so...");

            // Get first drawing view on drawing sheet

            swView = (View)swView.GetNextView();

            while ((swView != null))


                Debug.Print(" Get next drawing view on drawing sheet...");

                // Get first true drawing view on current drawing sheet

                Debug.Print(" Is this drawing view a flat-pattern view? " + swView.IsFlatPatternView());

                // If this drawing view is a flat pattern view, then

                // get its bendlines and their related tangent edges

                if (swView.IsFlatPatternView())


                    // Get number of bendlines in the drawing view

                    nbrBendlines = swView.GetBendLineCount();

                    BendlinesArr = new Object[nbrBendlines];

                    Debug.Print(" Number of bendlines in this drawing view: " + nbrBendlines);

                    if ((nbrBendlines > 0))


                        BendlinesArr = (Object[])swView.GetBendLines();

                        for (i = 0; i <= BendlinesArr.GetUpperBound(0); i++)


                            swSketchSegment = (SketchSegment)BendlinesArr[i];

                            Debug.Print(" Is bend line " + i + " really a bend line? " + swSketchSegment.IsBendLine());

                            // Get the number of tangent lines related to

                            // the bendline

                            nbrRelatedTangentEdges = swView.GetRelatedTangentEdgeCount(BendlinesArr[i]);

                            Debug.Print(" Number of tangent edges for Bendline " + i + ": " + nbrRelatedTangentEdges);

                            // Get the tangent lines related to the bendline

                            if ((nbrRelatedTangentEdges > 0))


                                RelatedTangentEdgesArr = swView.GetRelatedTangentEdges(BendlinesArr[i]);

                                nbrRelatedTangentEdges = nbrRelatedTangentEdges - 1;





                // Get next drawing view

                swView = (View)swView.GetNextView();



        public SldWorks swApp;



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