封装NPOI导出含下拉列表的Excel

 1  /// <summary>
 2         /// 绑定数据的方法
 3         /// </summary>
 4         /// <param name="ssfworkbook">HSSFWorkbook</param>
 5         /// <param name="sheet1">HSSFSheet</param>
 6         /// <param name="cateDt">数据源</param>
 7         /// <param name="sheetName">页名</param>
 8         /// <param name="dispName">显示名称</param>
 9         /// <param name="row">属于第几列</param>
10         /// <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>
11         private void GetCategoryData(HSSFWorkbook ssfworkbook, HSSFSheet sheet1, DataTable cateDt, string sheetName, string dispName, int row, int nextCount)
12         {
13             try
14             {
15                 HSSFSheet sheet2 = ssfworkbook.CreateSheet("Sht" + sheetName);
16                 int indexCate = 0;
17                 ssfworkbook.SetSheetHidden(row - nextCount, true);//隐藏
18
19                 foreach (DataRow cateItem in cateDt.Rows)
20                 {
21                     sheet2.CreateRow(indexCate).CreateCell(0).SetCellValue(cateItem[dispName].ToString());//列数据
22                     indexCate++;
23                 }
24                 HSSFName range = ssfworkbook.CreateName();//创建名称
25                 range.Reference = "Sht" + sheetName + "!$A$1:$A$" + indexCate;//格式
26                 range.NameName = sheetName;
27
28                 //将下拉列表添加
29                 CellRangeAddressList regions = null;
30                 regions = new CellRangeAddressList(1, 65535, row - 1, row - 1);
31                 DVConstraint constraint = DVConstraint.CreateFormulaListConstraint(sheetName);
32                 HSSFDataValidation dataValidate = new HSSFDataValidation(regions, constraint);
33                 sheet1.AddValidationData(dataValidate);
34             }
35             catch { }
36         }

 1    /// <summary>
 2         /// 设置Excel表头(数组Length必须相同)
 3         /// </summary>
 4         /// <param name="strName">Excel中的名称</param>
 5         /// <param name="width">宽</param>
 6         /// <param name="headerRow">HSSFRow</param>
 7         /// <param name="sheet1">HSSFSheet</param>
 8         /// <param name="HSSFWorkbook">ssfworkbook</param>
 9         private string SetUpExcelTitle(HSSFWorkbook ssfworkbook, string[] strName, int[] width, HSSFRow headerRow, HSSFSheet sheet1)
10         {
11             try
12             {
13                 if (strName.Length != width.Length)
14                 {
15                     return "数组长度不同！";
16                 }
17                 HSSFFont fontTitle = ssfworkbook.CreateFont();
18                 fontTitle.FontHeightInPoints = 11;
19                 fontTitle.Boldweight = HSSFFont.BOLDWEIGHT_NORMAL;
20                 HSSFCellStyle hssfCellTitle = ssfworkbook.CreateCellStyle();
21                 hssfCellTitle.SetFont(fontTitle);
22
23                 for (int i = 0; i < strName.Length; i++)
24                 {
25                     //设置表头
26                     headerRow.CreateCell(i).SetCellValue(strName[i]);
27                     //设置表头的宽度
28                     sheet1.SetColumnWidth(i, width[i]);
29                     headerRow.GetCell(i).CellStyle = hssfCellTitle;
30                 }
31                 return "ok";
32             }
33             catch (Exception ex)
34             {
35                 return ex.Message;
36             }
37         }

 1  /// <summary>
 2         /// 设置Excel内容
 3         /// </summary>
 4         /// <param name="values">内容</param>
 5         /// <param name="dataRow">HSSFRow</param>
 6         private void SetUpExcelContent(string[] values, HSSFRow dataRow)
 7         {
 8             for (int i = 0; i < values.Length; i++)
 9             {
10                 //填充数据
11                 dataRow.CreateCell(i).SetCellValue(values[i]);
12             }
13         }