.net关于企业Excel报表的生成

1.思路:用Excel模版+Data = .net关于企业Excel报表的生成

2.模板样式，表头字段用{|field|},表字段用{[field]}
3.代码

        /// <summary>
        /// 根据模板生成Excel报表
        /// </summary>
        /// <param name="dt">DataTable</param>
        /// <param name="templetFilePath">模板存放路径Sheet</param>
        /// <param name="outputFilePath">报表输出路径</param>
        public static void ExportReportForXLS(DataTable dt, string templetFilePath, string outputFilePath)
        {
            #region 验证
                      
            if (templetFilePath == null)
                throw new System.Exception("Excel模板文件路径不能为空！");

            if (outputFilePath == null)
                throw new System.Exception("输出Excel文件路径不能为空！");
            
            int colCount = dt.Columns.Count;//源dt的行数
            int rowCount = dt.Rows.Count;   //源dt的列数
            if(rowCount == 0)
                throw new System.Exception("没有数据");
            #endregion

            #region 变量定义
            int i = 0; int j = 0;int k = 0;
            CellInfo mycell;
            ArrayList headlist = new ArrayList();
            ArrayList detaillist = new ArrayList();
            DateTime beforeTime;
            DateTime afterTime;
            object missing = System.Reflection.Missing.Value;
            //创建一个Application对象并使其可见
            beforeTime = DateTime.Now;
            Excel.Application app = new Excel.ApplicationClass();
          
            app.Visible = true;
            afterTime = DateTime.Now;

            //打开模板文件，得到WorkBook对象
            Excel.Workbook workBook = app.Workbooks.Open(templetFilePath, missing, missing, missing, missing, missing,
                                missing, missing, missing, missing, missing, missing, missing);

            //得到WorkSheet对象
            Excel.Worksheet workSheet = (Excel.Worksheet)workBook.Sheets.get_Item(1);
            Excel.Range oRange;

            #endregion

            try
            {
                 #region  收集模板中的相关信息
                int rowCountM = 20;//模板最多20行
                int colCountM = 25; //模板最多25列
                mycell = new CellInfo();
                for (i = 1; i <= rowCountM; i++)
                {
                    for (j = 1; j <= colCountM; j++)
                    {
                        #region 表头和表内容信息收集
                        //sheet.Cells[top + j, left + k] = dt.Rows[startRow + j][k].ToString();
                       string celText = ((Excel.Range)workSheet.UsedRange.Cells[i, j]).Text.ToString();
                       if (celText.IndexOf("{|") > -1)
                        {
                            mycell = new CellInfo();
                            mycell.cellRow = i;
                            mycell.cellCol = j;
                            mycell.cellText = celText.Replace("{|", "").Replace("|}", "");
                            headlist.Add(mycell);
                        }
                        if (celText.IndexOf("{[") > -1)
                        {
                            mycell = new CellInfo();
                            mycell.cellRow = i;
                            mycell.cellCol = j;
                            mycell.cellText = celText.Replace("{[", "").Replace("]}", "");
                            detaillist.Add(mycell);
                        }

                        #endregion

                        #region 分组和图形
                        //if (((Excel.Range)worksheet.UsedRange.Cells[i, j]).Text.ToString().IndexOf("{(") > -1)
                        //{
                        //    mycell = new CellInfo();
                        //    mycell.cellRow = i;
                        //    mycell.cellCol = j;
                        //    mycell.cellText = ((Excel.Range)worksheet.UsedRange.Cells[i, j]).Text.ToString().Replace("{[", "").Replace("]}", "");
                        //    grouplist.Add(mycell);
                        //}
                        //if (((Excel.Range)worksheet.UsedRange.Cells[i, j]).Text.ToString().IndexOf("{@") > -1)
                        //{
                        //    graphstring = ((Excel.Range)worksheet.UsedRange.Cells[i, j]).Text.ToString().Replace("{@", "").Replace("@}", "");
                        //}
                        #endregion
                    }
                }
                #endregion

                if (detaillist.Count == 0) return;//没有表内容字段返回

                mycell = (CellInfo)detaillist[0];
                k = mycell.cellRow; //表内容的起始行号

                for (int row = 0; row < rowCount; row++)
                {
                    for (int col = 0; col < colCount; col++)
                    {
                        #region 处理header
                        if (row == 0)
                        {
                            for (int header = 0; header < headlist.Count; header++)
                            {
                                mycell = new CellInfo();
                                mycell = (CellInfo)headlist[header];
                                if (mycell.cellText == dt.Columns[col].Caption)
                                {
                                    workSheet.UsedRange.Cells[mycell.cellRow, mycell.cellCol] = dt.Rows[row][col].ToString();
                                }
                            }
                        }
                        #endregion
                    }

                    #region 处理Deatil

                    oRange = (Excel.Range)workSheet.Rows[k + row, missing];
                    oRange.Copy(missing);
                    oRange.Insert(Excel.XlInsertShiftDirection.xlShiftDown);

                    for (int detail = 0; detail < detaillist.Count; detail++)
                    {
                        mycell = new CellInfo();
                        mycell = (CellInfo)detaillist[detail];

                        //if (mycell.cellText == dt.Columns[col].Caption)
                        //{
                        string tt = dt.Rows[row][mycell.cellText].ToString();
                            workSheet.UsedRange.Cells[k + row + 1, mycell.cellCol] = dt.Rows[row][mycell.cellText].ToString();
                        //}
                    }
                    #endregion
                }

                //移除k行
                oRange = (Excel.Range)workSheet.Rows[k, missing];
                oRange.Delete(Excel.XlDeleteShiftDirection.xlShiftUp);
                oRange = (Excel.Range)workSheet.Rows[k + rowCount, missing];
                oRange.Delete(Excel.XlDeleteShiftDirection.xlShiftUp);

                #region grouplist
                /*
                 string groupheader = "";
                int grouprow = -1;
                int sumindex = 0;
                int groupcount = 0;
                int[] fields;
                Excel.Range cell1;
                Excel.Range cell2;
                Excel.Range sortcell;
                string subtotalloacaltion = "";
                if (grouplist.Count > 0)
                {
                    //get grouprow;
                    for (i = 0; i < grouplist.Count; i++)
                    {
                        mycell = new CellInfo();
                        mycell = (CellInfo)grouplist[i];
                        if (mycell.cellText.IndexOf("*") > -1)
                        {
                            grouprow = mycell.cellCol;
                            subtotalloacaltion = mycell.cellText.Replace("{(", "").Replace(")}", "").Replace("*", "").Trim().ToLower();
                            break;
                        }
                    }
                    if (grouprow > 0)
                    {
                        fields = new int[] { grouprow + 1, grouprow + 2 };
                        cell1 = (Excel.Range)worksheet.Cells[k, 1];
                        cell2 = (Excel.Range)worksheet.Cells[j, worksheet.UsedRange.Columns.Count];
                        sortcell = (Excel.Range)worksheet.Cells[k, grouprow];
                        oRange = (Excel.Range)worksheet.UsedRange.get_Range((Excel.Range)cell1, (Excel.Range)cell2);
                        oRange.Sort(sortcell, Excel.XlSortOrder.xlAscending, refmissing, refmissing, Excel.XlSortOrder.xlAscending, refmissing,
                           Excel.XlSortOrder.xlAscending, Excel.XlYesNoGuess.xlNo, refmissing, refmissing, Excel.XlSortOrientation.xlSortColumns, Excel.XlSortMethod.xlStroke);
                        cell1 = (Excel.Range)worksheet.Cells[k - 1, 1];
                        cell2 = (Excel.Range)worksheet.Cells[j, worksheet.UsedRange.Columns.Count];
                        oRange = (Excel.Range)worksheet.UsedRange.get_Range((Excel.Range)cell1, (Excel.Range)cell2);
                        if (subtotalloacaltion != "1")
                            oRange.Subtotal(grouprow, Excel.XlConsolidationFunction.xlCount, refmissing, refmissing, refmissing, Excel.XlSummaryRow.xlSummaryAbove);
                        else
                            oRange.Subtotal(grouprow, Excel.XlConsolidationFunction.xlCount, refmissing, refmissing, refmissing, Excel.XlSummaryRow.xlSummaryBelow);

                        //getsubtotal array
                        for (sumindex = k; sumindex <= worksheet.UsedRange.Rows.Count; sumindex++)
                        {
                            if (((Excel.Range)worksheet.Cells[sumindex, grouprow]).Text.ToString().IndexOf(" 計數") > -1)
                            {
                                mycell = new CellInfo();
                                mycell.cellCol = grouprow;
                                mycell.cellRow = sumindex;
                                subtotallist.Add(mycell);
                            }
                        }
                        CellInfo groupcellcurrent;
                        CellInfo groupcelllast;
                        CellInfo grouplistindex;
                        string fomu;

                        for (sumindex = 0; sumindex < grouplist.Count; sumindex++)
                        {
                            grouplistindex = new CellInfo();
                            grouplistindex = (CellInfo)grouplist[sumindex];
                            if (grouplistindex.cellText.IndexOf("*") < 0)
                            {
                                for (i = 0; i < subtotallist.Count; i++)
                                {

                                    if (i == 0)
                                    {
                                        mycell = new CellInfo();
                                        mycell = (CellInfo)subtotallist[i];
                                        groupcelllast = new CellInfo();
                                        groupcelllast.cellRow = k;
                                        groupcelllast.cellCol = grouplistindex.cellCol;
                                        groupcellcurrent = new CellInfo();
                                        groupcellcurrent.cellRow = mycell.cellRow - 1;
                                        groupcellcurrent.cellCol = grouplistindex.cellCol;
                                    }
                                    else
                                    {
                                        mycell = new CellInfo();
                                        mycell = (CellInfo)subtotallist[i - 1];
                                        groupcelllast = new CellInfo();
                                        groupcelllast.cellRow = mycell.cellRow;
                                        groupcelllast.cellCol = grouplistindex.cellCol;
                                        mycell = new CellInfo();
                                        mycell = (CellInfo)subtotallist[i];
                                        groupcellcurrent = new CellInfo();
                                        groupcellcurrent.cellRow = mycell.cellRow - 1;
                                        groupcellcurrent.cellCol = grouplistindex.cellCol;

                                    }
                                    oRange = (Excel.Range)worksheet.Cells[groupcellcurrent.cellRow + 1, groupcellcurrent.cellCol];

                                    fomu = "=" + grouplistindex.cellText.Replace("{(", "").Replace(")}", "") + "(R" + groupcelllast.cellRow.ToString() + "C" + groupcelllast.cellCol.ToString() +
                                        ":" + "R" + groupcellcurrent.cellRow.ToString() + "C" + groupcellcurrent.cellCol.ToString() + ")";
                                    try
                                    {
                                        oRange.FormulaR1C1 = fomu;
                                    }
                                    catch (System.Exception exfomu)
                                    {
                                        oRange.Value2 = "Error" + exfomu.ToString();
                                    }
                                }
                            }
                            else  // get the first groupcout list {(*)}
                            {
                                for (i = 0; i < subtotallist.Count; i++)
                                {
                                    mycell = new CellInfo();
                                    mycell = (CellInfo)subtotallist[i];
                                    oRange = (Excel.Range)worksheet.Cells[mycell.cellRow, mycell.cellCol + 1];
                                    mycell.cellText = ((Excel.Range)worksheet.UsedRange.Cells[mycell.cellRow, mycell.cellCol]).Text.ToString().Replace(" 計數", "");
                                    oRange.Value = mycell.cellText;

                                    //  oRange = worksheet.UsedRange.get_End(Excel.XlDirection.xlToLeft);
                                    // oRange.Value = mycell.cellCol.ToString();
                                    //fomu = "=" + "R" + mycell.cellRow.ToString() + "C" + mycell.cellCol.ToString() ;
                                    //      oRange.FormulaR1C1 = fomu;



                                }

                            }

                        }

                    }

                }


                string[] graphpara = graphstring.Split("|".ToCharArray());
                  */


                //draw graphic

                //1 . copy all the subtotal informat to worksheet2
                //for (i = 0; i < subtotallist.Count; i++)
                //{
                //    mycell = new CellInfo();
                //    mycell = (CellInfo)subtotallist[i];
                //    cell1 = (Excel.Range)worksheet.Cells[mycell.cellRow, 1];
                //    cell2 = (Excel.Range)worksheet.Cells[mycell.cellRow, worksheet.UsedRange.Columns.Count];
                //    oRange = (Excel.Range)worksheet.UsedRange.get_Range((Excel.Range)cell1, (Excel.Range)cell2);
                //    oRange.Copy(refmissing);
                //    cell1 = (Excel.Range)worksheet2.Cells[i, 1];
                //    cell1.PasteSpecial(Excel.XlPasteType.xlPasteAll, Excel.XlPasteSpecialOperation.xlPasteSpecialOperationNone, refmissing, refmissing);
                //}
                //   //end copy

                //Excel.Range oRange2;
                //oRange2 = worksheet.UsedRange;

                //if (graphpara.Length > 0)
                //{
                //    cell1 = (Excel.Range)worksheet.Cells[k, 1];
                //    cell2 = (Excel.Range)worksheet.Cells[j, worksheet.UsedRange.Columns.Count];
                //    oRange = (Excel.Range)worksheet.UsedRange.get_Range((Excel.Range)cell1, (Excel.Range)cell2);
                //    if (graphpara[0].ToLower().Trim() != "b")
                //        oRange2 = oRange;

                //}
                ////xlChart.ChartWizard(cellRange.CurrentRegion,Excel.XlChartType.xl3DColumn, Type.Missing,
                ////Excel.XlRowCol.xlColumns,1, 0, true ,"访问量比较(dahuzizyd.cnblogs.com)", "月份", "访问量",
                ////"");

                //if (graphpara.Length == 8)
                //{
                //    Excel.XlChartType charttype = getchartype(graphpara[1]);

                //    Excel.Chart xlChart = (Excel.Chart)Myexcel.Charts.Add(refmissing, refmissing, refmissing, refmissing);

                //    //xlChartl.ChartWizard(oRange2, Excel.XlChartType.xl3DColumn, refmissing, refmissing, refmissing, refmissing,refmissing, refmissing, refmissing, refmissing, refmissing);

                //    xlChart.ChartWizard(oRange2, charttype, Type.Missing, Excel.XlRowCol.xlColumns, Convert.ToInt32(graphpara[2]),
                //        Convert.ToInt32(graphpara[3]), true, graphpara[4], graphpara[5], graphpara[6], graphpara[7]);
                //}
                ////设置统计图Sheet的名称：
                ////xlChart.Name = "统计";

                ////现在的统计图只有一个组，他们会显示成一样的颜色，我们来让12个Bar都显示不同的颜色：

                ////Excel.ChartGroup grp = (Excel.ChartGroup)xlChart.ChartGroups(1);

                ////grp.GapWidth = 20;

                ////grp.VaryByCategories = true;


                ////现在Chart的条目的显示形状是Box，我们让它们变成圆柱形，并给它们显示加上数据标签：

                ////Excel.Series s = (Excel.Series)grp.SeriesCollection(1);

                ////s.BarShape = XlBarShape.xlCylinder;

                ////s.HasDataLabels = true;



                ////下面再来设置统计图的标题和图例的显示：

                ////xlChart.Legend.Position = XlLegendPosition.xlLegendPositionTop;

                ////xlChart.ChartTitle.Font.Size = 24;

                ////xlChart.ChartTitle.Shadow = true;

                ////xlChart.ChartTitle.Border.LineStyle = Excel.XlLineStyle.xlContinuous;



                //最后设置两个轴的属性，Excel.XlAxisType.xlValue对应的是Y轴，Excel.XlAxisType.xlCategory对应的是X轴：

                //Excel.Axis valueAxis = (Excel.Axis)xlChart.Axes(Excel.XlAxisType.xlValue, XlAxisGroup.xlPrimary);

                //valueAxis.AxisTitle.Orientation = -90;



                //Excel.Axis categoryAxis = (Excel.Axis)xlChart.Axes(Excel.XlAxisType.xlCategory, XlAxisGroup.xlPrimary);

                //categoryAxis.AxisTitle.Font.Name = "MS UI Gothic";


                //  Excel.Chart thischart;
                //  Excel.Range chartrange = (Excel.Range)worksheet.Cells[2,3];

                #endregion

                #region file save

                workBook.SaveAs(outputFilePath, missing, missing, missing, missing, missing, Excel.XlSaveAsAccessMode.xlExclusive, missing, missing, missing, missing);
                workBook.Close(null, null, null);
                app.Workbooks.Close();
                app.Application.Quit();
                app.Quit();

                System.Runtime.InteropServices.Marshal.ReleaseComObject(workSheet);
                System.Runtime.InteropServices.Marshal.ReleaseComObject(workBook);
                System.Runtime.InteropServices.Marshal.ReleaseComObject(app);

                workSheet = null;
                workBook = null;
                app = null;

                GC.Collect();
                #endregion
            }
            catch (System.Exception ex)
            {
                throw ex;
            }
            finally
            {
                #region 关闭在导出报表期间创建的Excel进程
                Process[] myProcesses;
                DateTime startTime;
                myProcesses = Process.GetProcessesByName("Excel");

                //得不到Excel进程ID，暂时只能判断进程启动时间
                foreach (Process myProcess in myProcesses)
                {
                    startTime = myProcess.StartTime;

                    if (startTime > beforeTime && startTime < afterTime)
                    {
                        myProcess.Kill();
                    }
                }
                #endregion
            }
        }

4.导出结果