NPOI.XSSF.UserModel.XSSFWorkbook.SetForceFormulaRecalculation C# (CSharp) Method

        public void SetForceFormulaRecalculation(bool value)
        {
            CT_Workbook ctWorkbook = GetCTWorkbook();

            CT_CalcPr calcPr = ctWorkbook.IsSetCalcPr() ? ctWorkbook.calcPr : ctWorkbook.AddNewCalcPr();
            // when Set to 0, will tell Excel that it needs to recalculate all formulas
            // in the workbook the next time the file is opened.
            calcPr.calcId = 0;
            if (value && calcPr.calcMode == ST_CalcMode.manual)
            {
                calcPr.calcMode = (ST_CalcMode.auto);
            }
        }

        public void TestRecalcId()
        {
            XSSFWorkbook wb = new XSSFWorkbook();

            Assert.IsFalse(wb.GetForceFormulaRecalculation());
            CT_Workbook ctWorkbook = wb.GetCTWorkbook();

            Assert.IsFalse(ctWorkbook.IsSetCalcPr());

            wb.SetForceFormulaRecalculation(true); // resets the EngineId flag to zero

            CT_CalcPr calcPr = ctWorkbook.calcPr;

            Assert.IsNotNull(calcPr);
            Assert.AreEqual(0, (int)calcPr.calcId);

            calcPr.calcId = 100;
            Assert.IsTrue(wb.GetForceFormulaRecalculation());

            wb.SetForceFormulaRecalculation(true); // resets the EngineId flag to zero
            Assert.AreEqual(0, (int)calcPr.calcId);
            Assert.IsFalse(wb.GetForceFormulaRecalculation());

            // calcMode="manual" is unset when forceFormulaRecalculation=true
            calcPr.calcMode = (ST_CalcMode.manual);
            wb.SetForceFormulaRecalculation(true);
            Assert.AreEqual(ST_CalcMode.auto, calcPr.calcMode);
        }