public class ExportTByNPOI { [STAThread] public static void ExportTDataByNPOI<T>(List<T> dataList,string fileName) { if(dataList!=null && dataList.Any()) { var firstData = dataList.FirstOrDefault(); var props = firstData.GetType().GetProperties().Where(x => !x.GetMethod.IsVirtual).ToList(); XSSFWorkbook workbook = new XSSFWorkbook(); ISheet firstSheet = workbook.CreateSheet("First Sheet"); IRow firstRow = firstSheet.CreateRow(0); for(int i=0;i<props.Count;i++) { ICell headerCell = firstRow.CreateCell(i); if(!string.IsNullOrEmpty(props[i].Name)) { headerCell.SetCellValue(props[i].Name); } } for(int i=1;i<=dataList.Count;i++) { IRow dataRow = firstSheet.CreateRow(i); for(int j=0;j<props.Count;j++) { ICell dataCell = dataRow.CreateCell(j); var dataCellValue = props[j].GetValue(dataList[i - 1]); if(dataCellValue!=null) { dataCell.SetCellValue(dataCellValue.ToString()); } } } using (FileStream excelStream = File.Open(fileName,FileMode.OpenOrCreate)) { workbook.Write(excelStream); } using (SaveFileDialog sfd = new SaveFileDialog()) { sfd.Filter = "Excel Files| *.xls; *.xlsx; *.xlsm|All files|*.*"; sfd.FileName = fileName; sfd.OverwritePrompt = false; if (sfd.ShowDialog() == DialogResult.OK) { sfd.FileName = fileName; } } } } }