static void Main(string[] args){//hssf表示2003   xssf表示2007  两者之间有的功能是一样的，比如设置列宽,锁定单元格//有的功能是不一样的,具体情况具体对待//实例化一个操作excel工作薄的对象IWorkbook workbook = new HSSFWorkbook();//创建表ISheet sheet1 = workbook.CreateSheet("sheet1");//创建行(一行一行的创建,参数代表第几行,不能相同,会覆盖)IRow row1 = sheet1.CreateRow(0);//创建单元格(一个一个的创建,参数代表第几个,不能相同,会覆盖)ICell cell1 = row1.CreateCell(0);//设置值cell1.SetCellValue("大家好");//设置格式ICell cell2 = row1.CreateCell(1);cell1.SetCellValue("hahah");SetCellStyle((HSSFWorkbook)workbook, cell1);//合并单元格MergeCell(sheet1, 0, 0, 1, 4);sheet1.SetColumnWidth(0, 20 * 256);sheet1.SetColumnWidth(1, 25 * 256);//创建另一个sheetISheet sheet2 = workbook.CreateSheet("sheet2");SetCellDropdownlist(sheet2);//下拉列表SetCellInputNumber(sheet2);//只能输入数字//锁定sheetISheet sheet3 = workbook.CreateSheet("sheet3");//设置密码，锁定表(只要设定就会锁定整个sheet)sheet3.ProtectSheet("123456");IRow row3 = sheet3.CreateRow(0);ICell c1 = row3.CreateCell(0);ICell c2 = row3.CreateCell(1);//不锁定HSSFCellStyle unlocked = (HSSFCellStyle)workbook.CreateCellStyle();unlocked.IsLocked = false;//锁定HSSFCellStyle locked = (HSSFCellStyle)workbook.CreateCellStyle();locked.IsLocked = true;c1.SetCellValue("未锁定");c1.CellStyle = unlocked;//其实这个设置不设置都一样的，只要加密就是锁定整个sheetc2.SetCellValue("锁定");c2.CellStyle = locked;using (Stream stream = File.OpenWrite(@"D:\test2.xls")){//进行保存workbook.Write(stream);}Console.WriteLine("成功");Console.ReadKey();}/// <summary>/// 设置单元格为下拉框并限制输入值/// </summary>/// <param name="sheet"></param>private static void SetCellDropdownlist(ISheet sheet){//设置生成下拉框的行和列(开始行，结束行，开始列，结束列)var cellRegions = new CellRangeAddressList(0, 20, 0, 0);//设置 下拉框内容DVConstraint constraint = DVConstraint.CreateExplicitListConstraint(new string[] { "itemA", "itemB", "itemC" });//绑定下拉框和作用区域，并设置错误提示信息HSSFDataValidation dataValidate = new HSSFDataValidation(cellRegions, constraint);dataValidate.CreateErrorBox("输入不合法", "请输入下拉列表中的值。");dataValidate.ShowPromptBox = true;sheet.AddValidationData(dataValidate);}/// <summary>/// 设置单元格只能输入数字/// </summary>/// <param name="sheet"></param>private static void SetCellInputNumber(ISheet sheet){//设置生成下拉框的行和列var cellRegions = new CellRangeAddressList(0, 10, 1, 1);//第二个参数int comparisonOperator  参考源码获取//https://github.com/tonyqus/npoi//NPOITest项目DVConstraint constraint = DVConstraint.CreateNumericConstraint(ValidationType.INTEGER, OperatorType.BETWEEN, "0", "10");HSSFDataValidation dataValidate = new HSSFDataValidation(cellRegions, constraint);dataValidate.CreateErrorBox("输入不合法", "请输入1~10的数字。");//dataValidate.PromptBoxTitle = "ErrorInput";sheet.AddValidationData(dataValidate);}/// <summary>/// 合并单元格/// </summary>/// <param name="sheet"></param>/// <param name="firstRow"></param>/// <param name="lastRow"></param>/// <param name="firstCell"></param>/// <param name="lastCell"></param>private static void MergeCell(ISheet sheet, int firstRow, int lastRow, int firstCell, int lastCell){sheet.AddMergedRegion(new CellRangeAddress(firstRow, lastRow, firstCell, lastCell));//2.0使用 2.0以下为Region}/// <summary>/// 设置单元格样式/// </summary>/// <param name="workbook"></param>/// <param name="cell"></param>private static void SetCellStyle(HSSFWorkbook workbook, ICell cell){HSSFCellStyle fCellStyle = (HSSFCellStyle)workbook.CreateCellStyle();HSSFFont ffont = (HSSFFont)workbook.CreateFont();ffont.FontHeight = 20 * 20;ffont.FontName = "宋体";ffont.Color = HSSFColor.RED.index;//2007中直接设置就好//ffont.Color = 2;fCellStyle.SetFont(ffont);fCellStyle.VerticalAlignment = NPOI.SS.UserModel.VerticalAlignment.CENTER;//垂直对齐fCellStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.CENTER;//水平对齐cell.CellStyle = fCellStyle;}