Hide Table of Contents

Automatically Solved Equations in Sequence (C#)

This example shows how to automatically sequence the equations in an order determined by SOLIDWORKS to produce accurate results.

// Preconditions:
// 1. Model document specified to open exists.
// 2. Open the Immediate window.
// Postconditions:
// 1. The equation's Automatic solve order option
//    is set to true, which results in the model's
//    independent equations executing before
//    dependent equations, if any.
// 2. Examine the Immediate window to verify.
// NOTE: Because this model is used elsewhere,
// do save any changes when closing it.
using SolidWorks.Interop.sldworks;
using SolidWorks.Interop.swconst;
using System.Runtime.InteropServices;
using System;
using System.Diagnostics;
namespace AutomaticSolveOrderCSharp.csproj
    public partial class SolidWorksMacro
        public void Main()
            ModelDoc2 swModel = default(ModelDoc2);
            EquationMgr swEquationMgr = default(EquationMgr);
            string fileName = null;
            int errors = 0;
            int warnings = 0;
            fileName = "C:\\Program Files\\SOLIDWORKS Corp\\SOLIDWORKS\\samples\\tutorial\\api\\partEquations.sldprt";
            swModel = (ModelDoc2)swApp.OpenDoc6(fileName, (int)swDocumentTypes_e.swDocPART, (int)swOpenDocOptions_e.swOpenDocOptions_Silent, ""ref errors, ref warnings);
            swEquationMgr = (EquationMgr)swModel.GetEquationMgr();
            //Make sure that this model includes equations
            //by getting the number of equations
            Debug.Print("Number of equations: " + swEquationMgr.GetCount());
            if (swEquationMgr.GetCount() >= 1)
                //Get whether equations are automatically
                //solved in sequence
                Debug.Print("  Are equations automatically solved in sequence? " + swEquationMgr.AutomaticSolveOrder);
                if (swEquationMgr.AutomaticSolveOrder)
                    //Automatically solve equations in sequence
                    swEquationMgr.AutomaticSolveOrder = true;
                    Debug.Print("  Are equations automatically solved in sequence? " + swEquationMgr.AutomaticSolveOrder);
                Debug.Print("No equations included with this model.");
        /// <summary>
        /// The SldWorks swApp variable is pre-assigned for you.
        /// </summary>
        public SldWorks swApp;

Provide feedback on this topic

SOLIDWORKS welcomes your feedback concerning the presentation, accuracy, and thoroughness of the documentation. Use the form below to send your comments and suggestions about this topic directly to our documentation team. The documentation team cannot answer technical support questions. Click here for information about technical support.

* Required

Subject:   Feedback on Help Topics
Page:   Automatically Solved Equations in Sequence (C#)
*   I acknowledge I have read and I hereby accept the privacy policy under which my Personal Data will be used by Dassault Systèmes

Print Topic

Select the scope of content to print:


We have detected you are using a browser version older than Internet Explorer 7. For optimized display, we suggest upgrading your browser to Internet Explorer 7 or newer.

 Never show this message again

Web Help Content Version: API Help (English only) 2015 SP05

To disable Web help from within SOLIDWORKS and use local help instead, click Help > Use SOLIDWORKS Web Help.

To report problems encountered with the Web help interface and search, contact your local support representative. To provide feedback on individual help topics, use the “Feedback on this topic” link on the individual topic page.