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

        public XSSFName GetBuiltInName(String builtInCode, int sheetNumber)
        {
            foreach (XSSFName name in namedRanges)
            {
                if (name.NameName.Equals(builtInCode, StringComparison.InvariantCultureIgnoreCase)
                    && name.SheetIndex == sheetNumber)
                {
                    return name;
                }
            }
            return null;
        }

        public void TestSetAutoFilter()
        {
            XSSFWorkbook wb = new XSSFWorkbook();
            XSSFSheet sheet = (XSSFSheet)wb.CreateSheet("new sheet");
            sheet.SetAutoFilter(CellRangeAddress.ValueOf("A1:D100"));

            Assert.AreEqual("A1:D100", sheet.GetCTWorksheet().autoFilter.@ref);

            // auto-filter must be registered in workboook.xml, see Bugzilla 50315
            XSSFName nm = wb.GetBuiltInName(XSSFName.BUILTIN_FILTER_DB, 0);
            Assert.IsNotNull(nm);

            Assert.AreEqual(0u, nm.GetCTName().localSheetId);
            Assert.AreEqual(true, nm.GetCTName().hidden);
            Assert.AreEqual("_xlnm._FilterDatabase", nm.GetCTName().name);
            Assert.AreEqual("'new sheet'!$A$1:$D$100", nm.GetCTName().Value);
        }