NPOI 设置导出的excel内容样式

导出excel时，有时要根据需要加上一些样式，以上几种样式是我在项目中用到的

一、给单元格加背景色只需两步：一是创建单元格背景景色对象；二是给单元格绑定样式

//创建单元格背景颜色对象               
                HSSFPalette palette = wb.GetCustomPalette(); //调色板实例

                palette.SetColorAtIndex(HSSFColor.Orange.Index, (byte)255, (byte)204, (byte)153);
                HSSFColor hssFColor = palette.FindColor((byte)255, (byte)204, (byte)153);

                ICellStyle cellStyleGround = wb.CreateCellStyle();

                cellStyleGround.FillPattern = FillPattern.SolidForeground; //老版本可能这样写FillPatternType.SOLID_FOREGROUND;
                cellStyleGround.SetFont(cs_content_Font);
                cellStyleGround.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center; //水平居中
                cellStyleGround.VerticalAlignment = NPOI.SS.UserModel.VerticalAlignment.Center; //垂直居中
                cellStyleGround.FillForegroundColor = hssFColor.Indexed;

//给单元格绑定样式
 cell.CellStyle = cellStyleGround;

二、给单元格内的字加上样式

 //创建工作簿
  HSSFWorkbook wb = new HSSFWorkbook();
   //创建工作表
  HSSFSheet sheet = wb.createSheet();
   //为工作表添加行
  HSSFRow row = sheet.createRow(0);
   //添加单元格
  HSSFCell cell = row.createCell(0);
   //创建字体
  HSSFFont ftRed = wb.createFont();
   ftRed.setStrikeout(true);
   ftRed.setColor(HSSFColor.RED.index);  
   HSSFFont ftBlue = wb.createFont();
   ftBlue.setColor(HSSFColor.BLUE.index);
   //往单元格中写入的内容,并使用ft格式化"second"单词
  String[] subStr = {
     "first", "second"
   };
   String sText = subStr[0] + "," + subStr[1];
   HSSFRichTextString textString = new HSSFRichTextString(sText);
   textString.applyFont(
     sText.indexOf(subStr[0]),
     sText.indexOf(subStr[0]) + subStr[0].length(),
     ftRed
     );
   textString.applyFont(
     sText.indexOf(subStr[1]),
     sText.indexOf(subStr[1]) + subStr[1].length(),
     ftBlue
     );
   cell.setCellValue(textString);

三、附项目中用到的代码

private void ExportAllPlan(HttpContext context)
        {
            string title = DateTime.Now.AddYears(1).Year.ToString() + "年度领导人员因公出国(境)计划表";
            HSSFWorkbook wb = new HSSFWorkbook();//创建工作薄
            HSSFSheet sheet = (HSSFSheet)wb.CreateSheet(title); //创建工作表
            
            //设置列头样式
            HSSFCellStyle cs_Title = (HSSFCellStyle)wb.CreateCellStyle(); //创建列头样式
            cs_Title.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center; //水平居中
            cs_Title.VerticalAlignment = NPOI.SS.UserModel.VerticalAlignment.Center; //垂直居中
            HSSFFont cs_Title_Font = (HSSFFont)wb.CreateFont(); //创建字体
            cs_Title_Font.FontHeightInPoints = 12; //字体大小
            cs_Title_Font.Boldweight = (short)NPOI.SS.UserModel.FontBoldWeight.Bold;
            cs_Title.SetFont(cs_Title_Font); //将字体绑定到样式
            //设置列宽
            for (int i = 0; i < 21; i++)
            {
                sheet.SetColumnWidth(i, 50 * 90);
            }
            
            //创建列头1行
            HSSFRow row_Title_One = (HSSFRow)sheet.CreateRow(0); 
            string[] titleStr_One = { title, "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "" };
            //设置列头样式
            HSSFCellStyle cs_Title_one = (HSSFCellStyle)wb.CreateCellStyle(); //创建列头样式
            cs_Title_one.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center; //水平居中
            cs_Title_one.VerticalAlignment = NPOI.SS.UserModel.VerticalAlignment.Center; //垂直居中
            HSSFFont cs_Title_Font_one = (HSSFFont)wb.CreateFont(); //创建字体
            cs_Title_Font_one.FontHeightInPoints = 24; //字体大小
            cs_Title_Font_one.Boldweight = (short)NPOI.SS.UserModel.FontBoldWeight.Bold;
            cs_Title_one.SetFont(cs_Title_Font_one); //将字体绑定到样式

            for (int i = 0; i < titleStr_One.Length; i++)
            {
                HSSFCell cell_Title = (HSSFCell)row_Title_One.CreateCell(i); //创建单元格
                row_Title_One.Height = 200*3;
                cell_Title.CellStyle = cs_Title_one; //将样式绑定到单元格
                cell_Title.SetCellValue(titleStr_One[i]);
            }
            //合并
            sheet.AddMergedRegion(new CellRangeAddress(0, 0, 0, 21));

            //创建列头2行           
            HSSFRow row_Title_Two = (HSSFRow)sheet.CreateRow(1);
            string[] titleStr_Two = { "分类", "单位名称", "上年计划总数", "上年执行计划数", "上年计划外团组数", "今年申报总数", "压缩调整总数", "取消总数", "计划明细", "", "", "", "", "", "", "", "", "", "合作交流处意见", "俄罗斯处意见", "美洲亚太处意见", "西亚非洲处意见" };
                       
            //填充列头内容
            for (int i = 0; i < titleStr_Two.Length; i++)
            {
                HSSFCell cell_Title = (HSSFCell)row_Title_Two.CreateCell(i); //创建单元格
                cell_Title.CellStyle = cs_Title; //将样式绑定到单元格
                cell_Title.SetCellValue(titleStr_Two[i]);
            }
           //合并
            sheet.AddMergedRegion(new CellRangeAddress(1, 2, 0, 0));
            sheet.AddMergedRegion(new CellRangeAddress(1, 2, 1, 1));
            sheet.AddMergedRegion(new CellRangeAddress(1, 2, 2, 2));
            sheet.AddMergedRegion(new CellRangeAddress(1, 2, 3, 3));
            sheet.AddMergedRegion(new CellRangeAddress(1, 2, 4, 4));
            sheet.AddMergedRegion(new CellRangeAddress(1, 2, 5, 5));
            sheet.AddMergedRegion(new CellRangeAddress(1, 2, 6, 6));
            sheet.AddMergedRegion(new CellRangeAddress(1, 2, 7, 7));

            sheet.AddMergedRegion(new CellRangeAddress(1, 1, 8, 17));

            sheet.AddMergedRegion(new CellRangeAddress(1, 2, 18, 18));
            sheet.AddMergedRegion(new CellRangeAddress(1, 2, 19, 19));
            sheet.AddMergedRegion(new CellRangeAddress(1, 2, 20, 20));
            sheet.AddMergedRegion(new CellRangeAddress(1, 2, 21, 21));
            sheet.AddMergedRegion(new CellRangeAddress(1, 2, 22, 22));
            //创建列头3行 
            HSSFRow row_Title_Three = (HSSFRow)sheet.CreateRow(2);
            string[] titleStr_Three = { "", "", "", "", "", "", "", "", "序号", "姓名", "职务", "任务名称", "前往国家", "启程时间（月）", "任务类别", "必要性说明", "备注", "处理意见", "", "", "", "" };
            
            //填充列头内容
            for (int i = 0; i < titleStr_Three.Length; i++)
            {
                HSSFCell cell_Title = (HSSFCell)row_Title_Three.CreateCell(i); //创建单元格
                cell_Title.CellStyle = cs_Title; //将样式绑定到单元格
                cell_Title.SetCellValue(titleStr_Three[i]);
            }


            try
            {
                //设置单元格内容样式
                HSSFCellStyle cs_content = (HSSFCellStyle)wb.CreateCellStyle(); //创建列头样式
                cs_content.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center; //水平居中
                cs_content.VerticalAlignment = NPOI.SS.UserModel.VerticalAlignment.Center; //垂直居中
                HSSFFont cs_content_Font = (HSSFFont)wb.CreateFont(); //创建字体
                cs_content_Font.FontHeightInPoints = 12; //字体大小
                cs_content.SetFont(cs_content_Font); //将字体绑定到样式

                //创建单元格背景颜色对象               
                HSSFPalette palette = wb.GetCustomPalette(); //调色板实例

                palette.SetColorAtIndex(HSSFColor.Orange.Index, (byte)255, (byte)204, (byte)153);
                HSSFColor hssFColor = palette.FindColor((byte)255, (byte)204, (byte)153);

                ICellStyle cellStyleGround = wb.CreateCellStyle();

                cellStyleGround.FillPattern = FillPattern.SolidForeground; //老版本可能这样写FillPatternType.SOLID_FOREGROUND;
                cellStyleGround.SetFont(cs_content_Font);
                cellStyleGround.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center; //水平居中
                cellStyleGround.VerticalAlignment = NPOI.SS.UserModel.VerticalAlignment.Center; //垂直居中
                cellStyleGround.FillForegroundColor = hssFColor.Indexed;


                //获取计划数据
                List<PlanToReport> plans = PlanToReportService.GetPlanByYear(DateTime.Now.AddYears(1).Year.ToString());
                //出国处导出的大表中，只导出提交给出国处处长及以后流程的计划，提交给出国处处长之前的计划不导出
                for (int i = 0; i < plans.Count; i++)
                {
                    StateMachineWorkflowInstance workflow = WorkflowRuntime.Current.GetRoot("PLANAPPLY", plans[i].ID);
                    string currState = workflow.CurrentState.Name;
                    string[] NoCanExportExcelPlan = ConfigurationManager.AppSettings["NoCanExportExcelPlanState"].Split(',');
                    for (int j = 0; j < NoCanExportExcelPlan.Length; j++)
                    {
                        if (currState.Trim() == NoCanExportExcelPlan[j].Trim())
                        {
                            plans.RemoveAt(i);
                            continue;
                        }
                    }

                }
                plans.Sort(new PlanToReportComparer());
                int unitCategoryfistRow = 3;
                int planDiffRow = 3;
                int unitDiffRow = 3;
                int resultDifRow = 3;
                string tempCategory = string.Empty;
                string tempUnitInfo = string.Empty;
                string tempApprovalResult = string.Empty;
                int colmNo = 3;
                for (int k = 0; k < plans.Count; k++)
                {
                    PlanToReport plan = plans[k];
                    UnitInfoBase unit = OilDigital.CGGL.BLL.UnitService.GetUnitByCode(plan.PlanUnitCode);
                    string[] planStr = { unit.Category.Name, unit.Name, plan.LastYearPlanSum.ToString(), plan.LastYearCarryOut.ToString(), plan.LastYearUnplanned.ToString(), PlanToReportService.GetPersonInPlan(plan.ID).Count.ToString(), plan.CompressTotal.ToString(), plan.CancelTotal.ToString() };
                    
                    List<PlanPerson> persons = PlanToReportService.GetPersonInPlan(plan.ID);
                    persons.Sort(new PlanPersonComparer());
                    int indexNo = 1;
                    
                    for (int i = 0; i < persons.Count; i++)
                    {
                       PlanPersonApprovalService pps =  new PlanPersonApprovalService();
                       // 取消审批
                        bool isDelete = pps.GetPlanPersonApprovalByIdAndType(persons[i].ID, "deletePerson") !=null;
                       //审批国家
                        PlanPersonApproval approvalCountry = pps.GetPlanPersonApprovalByIdAndType(persons[i].ID,"country");
                        bool hasAppCountry = approvalCountry != null;
                       //审批人员
                        PlanPersonApproval approvalPerson = pps.GetPlanPersonApprovalByIdAndType(persons[i].ID, "person");
                        bool hasAppPerson = approvalPerson != null;

                        string[] personStr = { indexNo.ToString(), persons[i].Name, persons[i].Position, persons[i].JobName, persons[i].CountryName, persons[i].StartDate, persons[i].MissionType.ToString(), persons[i].Explain, persons[i].Remark, persons[i].ApprovalResults };
                        HSSFRow row = (HSSFRow)sheet.CreateRow(i + unitCategoryfistRow);
                        bool isMergedplan = false;
                        bool isMergedunit = false;
                        bool isMergedApprovalResult = false;
                        for (int j = 0; j < 22; j++)
                        {
                            HSSFCell cell = (HSSFCell)row.CreateCell(j);
                            cell.CellStyle = cs_content;
                            /*
                             * 导出数据时总体说明：
                             *填充数据8-16为人员数据，0-7和17-22为计划数据 
                             *合并处理规则是：如果当前行和上一行不相同就合并上一行所有相同的，并对最后一行数据时行特殊处理。
                             */
                             //1、填充计划数据
                             if (j >= 0 && j <= 7)
                            { //填充第一行时用计划数据
                                 
                                cell.SetCellValue(planStr[j]);
                                if (j == 0)
                                {
                                    if (colmNo != 3 && !tempCategory.Equals(planStr[j]))
                                    {
                                        sheet.AddMergedRegion(new CellRangeAddress(planDiffRow, colmNo - 1, j, j));
                                        isMergedplan = true;
                                    }
                                    if (k == plans.Count - 1 && i == persons.Count - 1)
                                    {
                                        sheet.AddMergedRegion(new CellRangeAddress(planDiffRow, colmNo, j, j));
                                        isMergedplan = true;
                                    }
                                }
                                if (j > 0 )
                                {
                                    if (colmNo != 3 && !tempUnitInfo.Equals(planStr[1]))
                                    {
                                        sheet.AddMergedRegion(new CellRangeAddress(unitDiffRow, colmNo - 1, j, j));
                                        isMergedunit = true;
                                    }
                                    if (k == plans.Count - 1 && i == persons.Count - 1)
                                    {
                                        sheet.AddMergedRegion(new CellRangeAddress(unitDiffRow, colmNo, j, j));
                                        isMergedunit = true;
                                    }
                                }

                            }
                            //2、填充人员数据
                            else if (j >= 8 && j <= 17)
                            {
                                if (j == 14)
                                {
                                    cell.SetCellValue(new MissionTypeService().GetById(int.Parse(personStr[j - 8])).Name);
                                }
                                else if (j == 12 && hasAppCountry)
                                {
                                    cell.SetCellValue(FmatterCellValue(persons[i], wb, "country"));
                                }
                                else if (j == 9 && hasAppPerson)
                                {
                                    cell.SetCellValue(FmatterCellValue(persons[i], wb, "person"));
                                }
                                else if (j == 17)
                                {
                                    string cellval = persons[i].ApprovalResults;
                                    if (!string.IsNullOrEmpty(persons[i].ApprovalResults))
                                    {
                                        cellval = persons[i].ApprovalResults.IndexOf("选0") > 0 ? "合并" : persons[i].ApprovalResults;
                                    }

                                    cell.SetCellValue(cellval);
                                   // if (colmNo != 3 && !tempApprovalResult.Equals(new PlanProcess().GetFmatterApprovalResult(persons[i])) && !string.IsNullOrEmpty(new PlanProcess().GetFmatterApprovalResult(persons[i])))
                                    if (colmNo != 3 && !tempApprovalResult.Equals(new PlanProcess().GetFmatterApprovalResult(persons[i])))
                                    {
                                        sheet.AddMergedRegion(new CellRangeAddress(resultDifRow, colmNo - 1, j, j));
                                        isMergedApprovalResult = true;
                                    }
                                    if (k == plans.Count - 1 && i == persons.Count - 1)
                                    {
                                        sheet.AddMergedRegion(new CellRangeAddress(resultDifRow, colmNo, j, j));
                                        isMergedApprovalResult = true;
                                    }
                                    if (!string.IsNullOrEmpty(persons[i].ApprovalResults))
                                    {
                                        cell.CellStyle = cellStyleGround;
                                    }
                                   // cell.SetCellValue(new PlanProcess().GetFmatterApprovalResult(persons[i]));
                                }
                                else
                                {
                                    cell.SetCellValue(personStr[j - 8]);
                                }
                                if (isDelete && j != 17)
                                { 
                                cell.CellStyle = cellStyleGround;
                                }
                                
                                
                                
                            }
                            //3、填充意见数据
                            else
                            {
                                cell.SetCellValue("");
                                if (j > 17 && tempUnitInfo.Equals(planStr[1]))
                                {
                                    sheet.AddMergedRegion(new CellRangeAddress(i + unitCategoryfistRow - 1, i + unitCategoryfistRow, j, j));
                                }
                            }

                        }
                        if (isMergedplan) planDiffRow = colmNo;
                        if (isMergedunit) unitDiffRow = colmNo;
                        if (isMergedApprovalResult) resultDifRow = colmNo;
                        tempCategory = planStr[0];
                        tempUnitInfo = planStr[1];
                        tempApprovalResult = new PlanProcess().GetFmatterApprovalResult(persons[i]);
                        indexNo++;
                        colmNo++;
                    }
                    unitCategoryfistRow += persons.Count;
                }
                
               
            }
            catch (Exception ex)
            {

                throw new Exception("导出计划出错，原因：" + ex.Message);
            }
        
          
            HttpResponse httpResponse = HttpContext.Current.Response;
            httpResponse.Clear();
            httpResponse.Buffer = true;
            httpResponse.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(title + ".xls"));
            httpResponse.ContentEncoding = Encoding.UTF8;
            httpResponse.ContentType = "application/vnd.ms-excel; charset=UTF-8";
            wb.Write(httpResponse.OutputStream);
            httpResponse.End();
        }

//
private HSSFRichTextString FmatterCellValue(PlanPerson p, HSSFWorkbook wb, string FmatterType)
        {
            PlanPersonApproval approval = new PlanPersonApprovalService().GetPlanPersonApprovalByIdAndType(p.ID, FmatterType);

            StringBuilder countryName = new StringBuilder();
            string[] selectCountry = approval.ApprovalResult.Split('、');
            string[] allCountry = null;
            if (FmatterType == "country")
            {
                allCountry = p.CountryName.Split('、');
            }
            if (FmatterType == "person")
            {
                allCountry = p.Name.Split('、');
            }
            
            

            string needDeleteCountry = string.Empty;
            for (int i = 0; i < allCountry.Length; i++)
            {
                bool flag = true;
                for (int j = 0; j < selectCountry.Length; j++)
                {
                    if (allCountry[i].Trim() == selectCountry[j].Trim())
                    {
                        flag = false;
                    }
                }
                if (flag)
                {
                    if (string.IsNullOrEmpty(needDeleteCountry))
                    {
                        needDeleteCountry = allCountry[i];
                    }
                    else
                    {
                        needDeleteCountry += "、" + allCountry[i];
                    }

                }
            }
            String[] subStr = {
     approval.ApprovalResult, needDeleteCountry
   };

            //创建字体
            HSSFFont ftRed = (HSSFFont)wb.CreateFont();
            ftRed.IsStrikeout=true;
            ftRed.Color=HSSFColor.Red.Index;
            ftRed.FontHeightInPoints = 12;
            String sText = subStr[0] + "、" + subStr[1];
            HSSFRichTextString textString = new HSSFRichTextString(sText);
 
            textString.ApplyFont(
              sText.IndexOf(subStr[1]),
              sText.IndexOf(subStr[1]) + subStr[1].Length,
              ftRed
              );
            return textString;
        }