封装NPOI导出含下拉列表的Excel

  /// <summary>
         /// 绑定数据的方法
         /// </summary>
         /// <param name="ssfworkbook">HSSFWorkbook</param>
         /// <param name="sheet1">HSSFSheet</param>
         /// <param name="cateDt">数据源</param>
         /// <param name="sheetName">页名</param>
         /// <param name="dispName">显示名称</param>
         /// <param name="row">属于第几列</param>
         /// <param name="nextCount">相隔下一列的位置(只要有一列为1，后面便都为1，以此类推)</param>
         private void GetCategoryData(HSSFWorkbook ssfworkbook, HSSFSheet sheet1, DataTable cateDt, string sheetName, string dispName, int row, int nextCount)
         {
             try
             {
                 HSSFSheet sheet2 = ssfworkbook.CreateSheet("Sht" + sheetName);
                 int indexCate = ;
                 ssfworkbook.SetSheetHidden(row - nextCount, true);//隐藏

                 foreach (DataRow cateItem in cateDt.Rows)
                 {
                     sheet2.CreateRow(indexCate).CreateCell().SetCellValue(cateItem[dispName].ToString());//列数据
                     indexCate++;
                 }
                 HSSFName range = ssfworkbook.CreateName();//创建名称
                 range.Reference = "Sht" + sheetName + "!$A$1:$A$" + indexCate;//格式
                 range.NameName = sheetName;

                 //将下拉列表添加
                 CellRangeAddressList regions = null;
                 regions = new CellRangeAddressList(, , row - , row - );
                 DVConstraint constraint = DVConstraint.CreateFormulaListConstraint(sheetName);
                 HSSFDataValidation dataValidate = new HSSFDataValidation(regions, constraint);
                 sheet1.AddValidationData(dataValidate);
             }
             catch { }
         }

    /// <summary>
         /// 设置Excel表头(数组Length必须相同)
         /// </summary>
         /// <param name="strName">Excel中的名称</param>
         /// <param name="width">宽</param>
         /// <param name="headerRow">HSSFRow</param>
         /// <param name="sheet1">HSSFSheet</param>
         /// <param name="HSSFWorkbook">ssfworkbook</param>
         private string SetUpExcelTitle(HSSFWorkbook ssfworkbook, string[] strName, int[] width, HSSFRow headerRow, HSSFSheet sheet1)
         {
             try
             {
                 if (strName.Length != width.Length)
                 {
                     return "数组长度不同！";
                 }
                 HSSFFont fontTitle = ssfworkbook.CreateFont();
                 fontTitle.FontHeightInPoints = ;
                 fontTitle.Boldweight = HSSFFont.BOLDWEIGHT_NORMAL;
                 HSSFCellStyle hssfCellTitle = ssfworkbook.CreateCellStyle();
                 hssfCellTitle.SetFont(fontTitle);

                 for (int i = ; i < strName.Length; i++)
                 {
                     //设置表头
                     headerRow.CreateCell(i).SetCellValue(strName[i]);
                     //设置表头的宽度
                     sheet1.SetColumnWidth(i, width[i]);
                     headerRow.GetCell(i).CellStyle = hssfCellTitle;
                 }
                 return "ok";
             }
             catch (Exception ex)
             {
                 return ex.Message;
             }
         }

  /// <summary>
         /// 设置Excel内容
         /// </summary>
         /// <param name="values">内容</param>
         /// <param name="dataRow">HSSFRow</param>
         private void SetUpExcelContent(string[] values, HSSFRow dataRow)
         {
             for (int i = ; i < values.Length; i++)
             {
                 //填充数据
                 dataRow.CreateCell(i).SetCellValue(values[i]);
             }
         }