Set Rows to repeat at top when printing - Open XML and Excel

Question

I am trying to get the first 4 rows of an xlsx file to repeat at the top of each page when printed. I am using the Open XML SDK to accomplish this.

My file is bei

Answer 1

Below code block solved my problem:

string fileName = AppDomain.CurrentDomain.BaseDirectory + "/Content/Master-License-Export.xlsx";
                    var spreadsheetDocument = SpreadsheetDocument.Open(fileName, true);           
                    WorkbookPart wbp = spreadsheetDocument.WorkbookPart;

                    UInt32 localSheetId = 0;    //LocalSheetIds are 0-indexed.

                    var definedName = new DefinedName
                    {
                        Name = "_xlnm.Print_Titles",
                        LocalSheetId = localSheetId,
                        Text = String.Format("\'{0}\'!${1}:${2}", "Master-License-Export", 1, 4)
                    };

                    if (wbp.Workbook.DefinedNames == null)
                    {
                        var definedNamesCol = new DefinedNames();
                        wbp.Workbook.Append(definedNamesCol);
                    }

                    wbp.Workbook.DefinedNames.Append(definedName);

                    wbp.Workbook.Save();
                    spreadsheetDocument.Close();