Add Equation and Evaluate All Example (C#)

This example shows how to use EquationMgr interfaces to add an equation to a model and

delay evaluation until all equations have been added.

//--------------------------------------------------------------------------    

// Preconditions:  Open any model document.       

//      

// Post-conditions:     

// 1. Observe 26 new equations in the Equations folder of the

//    FeatureManager design tree.

// 2. Observe the near-zero evaluation time for each equation

//    in the Immediate Window, demonstrating that the evaluations

//    were delayed.   

//-------------------------------------------------------------------------

using SolidWorks.Interop.sldworks;

using SolidWorks.Interop.swconst;

using System;

using System.Diagnostics;

namespace AddEquationAndEvaluateAll_CSharp.csproj

{

    partial class SolidWorksMacro

    {

        public void Main()

        {

            ModelDoc2 swModel = default(ModelDoc2);

            swModel = (ModelDoc2)swApp.ActiveDoc;

            EquationMgr MyEqu = default(EquationMgr);

            int Index = 0;

            long lValue = 0;

            long evalStatus = 0;   

          

                System.DateTime t1 = default(System.DateTime);

                System.DateTime t2 = default(System.DateTime);

      

            long i = 0;

            i = 0;

            MyEqu = swModel.GetEquationMgr();

            if (MyEqu.GetCount() > 0)

            {

                while ((i < 26))

                {

                    MyEqu.Delete(0);

                    i = i + 1;

                }

            }

            Debug.Print("Delaying evaluation of equations until the end...");

            for (Index = System.Convert.ToInt32('A'); Index <= System.Convert.ToInt32('Z'); Index++)

            {

                t1 = DateTime.Now;

                //Delay solving each equation until after all equations are added (set solve parameter to False)

                //FeatureManager design tree not updated

                lValue = MyEqu.Add2(Index, "\"" + System.Convert.ToChar(Index) + "\"=" + Index, false);

                

                t2 = DateTime.Now;

                Debug.Print("Time of evaluation for character " + System.Convert.ToChar(Index) + ": ");

                TimeSpan t3 = t2 - t1;

                Debug.Print(t3.ToString());

            }

            Debug.Print("number of equations added to EquationMgr is " + MyEqu.GetCount());

            //Solve all equations after they have been added

            //FeatureManager design tree updated

            Debug.Print("Evaluating all equations...");

            evalStatus = MyEqu.EvaluateAll();

            Debug.Print("finished Add2 and EvaluateAll");

            MyEqu = null;

            swModel = null;

            //swApp.CloseAllDocuments True

            swApp = null;

        }

        public SldWorks swApp;

    }

}