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Compare Geometry Example (C#)


// This example shows how to use the SOLIDWORKS Utilities API to compare geometries in two part documents.


// Preconditions:


// 1. Add the SOLIDWORKS Utilities interop assembly as a reference

//    (right-click on the project in Project Explorer, Add Reference,

//     Browse to <SOLIDWORKS_install_dir>\api\redist\CLR2,

//     select Solidworks.Interop.gtswutilities.dll).

// 2. Change the namespace of this example to <Your_project_name>.csproj.

// 2. The specified files exist.

// 3. C:\test\ exists.


// Postconditions:


// 1. Geometry comparison report, C:\test\Report\gtReportIndex.htm, is created.

// 2. Face and volume comparison statuses display in the Immediate Window.

// 3. Volume comparison part, C:\test\volumeComparison.sldprt, is created.


// NOTE: Do not save any changes.


using SOLIDWORKS.Interop.sldworks;

using SOLIDWORKS.Interop.swconst;

using SOLIDWORKS.Interop.gtswutilities;

using System;

using System.Diagnostics;

namespace CompareGeometry_CSharp.csproj


    partial class SOLIDWORKSMacro


        public void Main()


            gtcocswUtilities swUtil = default(gtcocswUtilities);

            gtcocswCompareGeometry swUtilCompGeom = default(gtcocswCompareGeometry);

            gtError_e longStatus = default(gtError_e);

            bool bAddToBinder = false;

            bool bOverwrite = false;

            int errorCode = 0;

            // Get the SOLIDWORKS Utilities tool interface

            swUtil = (gtcocswUtilities)swApp.GetAddInObject("Utilities.UtilitiesApp");

            // Get the CompareGeometry tool

            swUtilCompGeom = (gtcocswCompareGeometry)swUtil.GetToolInterface(2, out errorCode);

            if (!(errorCode == (int)gtError_e.gtNOErr))


                Debug.Print("Error getting compare geometry tool. Inspect gtError_e = " + errorCode + " in the API help.");


            // Compare the volumes and faces of the specified part documents

            // Save the results to a file in the specified path

            bAddToBinder = false;

            bOverwrite = true;

            string file1 = null;

            string file2 = null;

            int volDiffStatus = 0;

            int faceDiffStatus = 0;


            file1 = "C:\\Program Files\\SOLIDWORKS Corp\\SOLIDWORKS\\samples\\tutorial\\swutilities\\bracket_a.sldprt";

            file2 = "C:\\Program Files\\SOLIDWORKS Corp\\SOLIDWORKS\\samples\\tutorial\\swutilities\\bracket_b.sldprt";

            longStatus = (gtError_e)swUtilCompGeom.CompareGeometry3(file1, "", file2, "", (int)gtGdfOperationOption_e.gtGdfFaceAndVolumeCompare, (int)gtResultOptions_e.gtResultSaveReport, "C:\\test\\Report", bAddToBinder, bOverwrite, ref volDiffStatus,

            ref faceDiffStatus);

            if (!(longStatus == gtError_e.gtNOErr))


                Debug.Print("Error comparing geometries. Inspect gtError_e = " + longStatus + " in the API help.");


            diffStatus("Volume comparison", volDiffStatus);

            diffStatus("Face comparison", faceDiffStatus);

            //Save the volume comparison results as a solid part

            longStatus = (gtError_e)swUtilCompGeom.SaveCompareVolumeResults("c:\\test\\volumeComparison");

            // Perform any necessary clean up

            longStatus = (gtError_e)swUtilCompGeom.Close();


        public void diffStatus(string name, int diffCode)



            switch (diffCode)


                case (int)gtVolDiffStatusOptionType_e.gtSuccess:



                case (int)gtVolDiffStatusOptionType_e.gtNotPerformed:

                    Debug.Print("Not performed");


                case (int)gtVolDiffStatusOptionType_e.gtCanceled:



                case (int)gtVolDiffStatusOptionType_e.gtFailed:



                case (int)gtVolDiffStatusOptionType_e.gtIdenticalParts:

                    Debug.Print("Identical parts");


                case (int)gtVolDiffStatusOptionType_e.gtDifferentParts:

                    Debug.Print("Different parts");


                case (int)gtVolDiffStatusOptionType_e.gtNoSolidBody:

                    Debug.Print("No solid body found");


                case (int)gtVolDiffStatusOptionType_e.gtAlreadySaved:

                    Debug.Print("Already saved");



            Debug.Print(" ");


        public SldWorks swApp;



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