public static void SetCellDropdownList(ISheet sheet, int firstcol, int lastcol, string[] vals)
{
? ? ?//設(shè)置生成下拉框的行和列
? ? ?var cellRegions = new CellRangeAddressList(1, 65535, firstcol, lastcol);
?
? ? ?//設(shè)置 下拉框內(nèi)容
? ? ?DVConstraint constraint = DVConstraint.CreateExplicitListConstraint(vals);
?
? ? ?//綁定下拉框和作用區(qū)域，并設(shè)置錯(cuò)誤提示信息
? ? ?HSSFDataValidation dataValidate = new HSSFDataValidation(cellRegions, constraint);
? ? ?dataValidate.CreateErrorBox("輸入不合法", "請輸入或選擇下拉列表中的值。");
? ? ?dataValidate.ShowPromptBox = true;
?
? ? ?sheet.AddValidationData(dataValidate);
}

調(diào)用：

HSSFWorkbook workbook = new HSSFWorkbook();
ISheet sheet = workbook.CreateSheet("sheet1");
ExcelHelper.SetCellDropdownList(sheet, 1, 1, new List<string>() { "男", "女", "保密" }.ToArray());

第二種

· 通過綁定值到sheet中設(shè)置下拉

· 適用于數(shù)據(jù)較多，或靈活控制的值，例如：城市區(qū)域、數(shù)據(jù)表信息等。

方法塊：

public static void SetCellDropdownList(HSSFWorkbook workbook, ISheet sheet, string name, int firstcol, int lastcol, string[] vals, int sheetindex = 1)
{
? ? ? //先創(chuàng)建一個(gè)Sheet專門用于存儲下拉項(xiàng)的值
? ? ? ISheet sheet2 = workbook.CreateSheet(name);
? ? ? //隱藏
? ? ? workbook.SetSheetHidden(sheetindex, true);
? ? ? int index = 0;
? ? ? foreach (var item in vals)
? ? ? {
? ? ? ? ? sheet2.CreateRow(index).CreateCell(0).SetCellValue(item);
? ? ? ? ? index++;
? ? ? }
? ? ? //創(chuàng)建的下拉項(xiàng)的區(qū)域：
? ? ? var rangeName = name + "Range";
? ? ? IName range = workbook.CreateName();
? ? ? range.RefersToFormula = name + "!$A$1:$A$" + index;
? ? ? range.NameName = rangeName;
? ? ? CellRangeAddressList regions = new CellRangeAddressList(0, 65535, firstcol, lastcol);
?
? ? ? DVConstraint constraint = DVConstraint.CreateFormulaListConstraint(rangeName);
? ? ? HSSFDataValidation dataValidate = new HSSFDataValidation(regions, constraint);
? ? ? dataValidate.CreateErrorBox("輸入不合法", "請輸入或選擇下拉列表中的值。");
? ? ? dataValidate.ShowPromptBox = true;
? ? ? sheet.AddValidationData(dataValidate);
}

調(diào)用：

HSSFWorkbook workbook = new HSSFWorkbook();
ISheet sheet = workbook.CreateSheet("sheet1");
var roomTypeList = GetRoomTypeNameList();
ExcelHelper.SetCellDropdownList(workbook, sheet, "RoomTypeDictionary", 1, 1, roomTypeList.ToArray());

另外，延伸聯(lián)動下拉（直接貼源碼了）

方法塊：

private void SetCityCellDropdownList(HSSFWorkbook workbook, ISheet sheet, string dictionaryName, int citycol, int areacol, int sheetIndex)
{
?? ?var citylist = GetCityList();
?? ?int citycount = citylist.Count;
?? ?ISheet sheet2 = workbook.CreateSheet(dictionaryName);
?? ?//隱藏
?? ?workbook.SetSheetHidden(sheetIndex, true);
?
?? ?#region 城市區(qū)域數(shù)據(jù)構(gòu)造
?? ?//城市
?? ?int rowIndex = 0;
?? ?foreach (var item in citylist)
?? ?{
?? ??? ?IRow row = sheet2.CreateRow(rowIndex);
?? ??? ?row.CreateCell(0).SetCellValue(item.Name);
?
?? ??? ?rowIndex++;
?? ?}
?? ?//區(qū)域
?? ?int n_rowIndex = 0;
?? ?foreach (var item in citylist)
?? ?{
?? ??? ?int areaIndex = 0;
?? ??? ?foreach (var area in item.AreaList)
?? ??? ?{
?? ??? ??? ?IRow row = sheet2.GetRow(areaIndex);
?? ??? ??? ?if (row == null)
?? ??? ??? ?{
?? ??? ??? ??? ?row = sheet2.CreateRow(areaIndex);
?? ??? ??? ?}
?? ??? ??? ?row.CreateCell(n_rowIndex + 1).SetCellValue(area.Name);
?? ??? ??? ?areaIndex++;
?? ??? ?}
?? ??? ?n_rowIndex++;
?? ?}
?? ?#endregion
?
?? ?#region 設(shè)置數(shù)據(jù)字段范圍
?? ?//定義城市
?? ?int columnIndex = 1;
?? ?IName range_Country = workbook.CreateName();
?? ?range_Country.RefersToFormula = string.Format("{0}!${1}$1:${1}${2}", dictionaryName, GetExcelColumnName(columnIndex), citycount);
?? ?range_Country.NameName = "城市";
?
?? ?//定義區(qū)
?? ?foreach (var item in citylist)
?? ?{
?? ??? ?int areacount = item.AreaList.Count;
?? ??? ?columnIndex++;
?? ??? ?IName range_area = workbook.CreateName();
?? ??? ?range_area.RefersToFormula = string.Format("{0}!${1}$1:${1}${2}", dictionaryName, GetExcelColumnName(columnIndex), areacount);
?? ??? ?range_area.NameName = item.Name;
?? ?}
?
?? ?//城市列表下拉綁定
?? ?ExcelHelper.SetCellDropdownList(sheet, 1, 65535, citycol, citycol, "城市");
?
?? ?//第二列，跟隨第一列聯(lián)動
?? ?string colName = GetExcelColumnName(areacol);
?? ?for (int j = 1; j < 500; j++)
?? ?{
?? ??? ?ExcelHelper.SetCellDropdownList(sheet, j, j, areacol, areacol, string.Format("INDIRECT(${0}${1})", colName, j + 1));
?? ?}
?? ?#endregion
}
?
private string GetExcelColumnName(int columnNumber)
{
?? ?int dividend = columnNumber;
?? ?string columnName = String.Empty;
?? ?int modulo;
?
?? ?while (dividend > 0)
?? ?{
?? ??? ?modulo = (dividend - 1) % 26;
?? ??? ?columnName = Convert.ToChar(65 + modulo).ToString() + columnName;
?? ??? ?dividend = (int)((dividend - modulo) / 26);
?? ?}
?
?? ?return columnName;
}

public static void SetCellDropdownList(ISheet sheet, int firstRow, int lastRow, int firstCol, int lastCol, string name)
{
?? ?CellRangeAddressList regions = new CellRangeAddressList(firstRow, lastRow, firstCol, lastCol);
?? ?DVConstraint constraint = DVConstraint.CreateFormulaListConstraint(name);
?? ?HSSFDataValidation dataValidate = new HSSFDataValidation(regions, constraint);
?? ?dataValidate.CreateErrorBox("輸入不合法", "請輸入或選擇下拉列表中的值。");
?? ?sheet.AddValidationData(dataValidate);
}

調(diào)用：

HSSFWorkbook workbook = new HSSFWorkbook();
ISheet sheet = workbook.CreateSheet("sheet1");
SetCityCellDropdownList(workbook, sheet, "CityDictionary", 1, 2, 1);

以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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