excel报表开发-- 根据datatable个数自动生成新sheet

总结一下很久之前做的报表小程序，今日有问题又调试了一下。

DB中存在一个表，记录了ID<自增长>,SqlStatement<sql查询语句>及其他必要字段，比如SheetName,ReferenceTable，InertDate等等

任务是循环表记录，针对SqlStatement语句查询结果，对应dataTable，如有数据则以一个sheet显示出来，如果没有数据则略过。

以下是循环生成sheet的代码：

public static void Create(ref Workbook xBook, ref Application xApp, out string ReportDate)
        {
            Hashtable hash = new Hashtable();
            IT_Check_ReportMgr reportMgr = new IT_Check_ReportMgr();
            System.Data.DataTable ItCheckEecel = new System.Data.DataTable();//为了避免不明确引用

            Worksheet ws;

            int idcount;
            reportMgr.Get_ITCheckID_Data(out idcount);
            DataSet ds = new DataSet();
            ds = reportMgr.Get_ITCheck_Data();

            string strReportDate = reportMgr.GetFlieGenerateDate();
            ReportDate = strReportDate;

            string key = string.Empty;
            for (int i = 0; i < ds.Tables.Count;i++ )
            {
                key = "dt" + i.ToString();
                if (ds.Tables[i].Rows.Count==0)
                    continue;//如果DT没有数据，则终止当前，开始新的循环
                hash.Add(key, ds.Tables[i]);

                ws = (Worksheet)xBook.Sheets[xBook.Sheets.Count];

                //获取sheet名
                if (reportMgr.GetSheetName(i).Length >= 31)
                {
                    ws.Name = reportMgr.GetSheetName(i).Substring(0, 30);
                }
                else
                {
                    ws.Name = reportMgr.GetSheetName(i);
                }

                IT_Check_Report_Sheet sheetNew = new IT_Check_Report_Sheet(ref ws);
                sheetNew.Generate(hash, ws.Name, i);

                if ( i+1==ds.Tables.Count)
                    continue;
                xBook.Sheets.Add(Type.Missing, xBook.Sheets[xBook.Sheets.Count], Type.Missing, Type.Missing);
                
            }
            hash.Clear();


            ////删除无用的sheet
            //xApp.DisplayAlerts = false; //如果想删除某个sheet页，首先要将此项设为fasle，最开始生成excel因工作薄内至少含有一张可视工作表，开始时不可删除
            //for (int i = 1; i < xApp.Worksheets.Count; i++)
            //{
            //    if (((Worksheet)xApp.Worksheets[i]).Name.IndexOf("Sheet")> -1)//sheetName中是否包含带有sheet名的工作表
            //    {
            //        (xApp.ActiveWorkbook.Sheets[i] as Worksheet).Delete();
            //    }
            //}
            //xApp.DisplayAlerts = false;

            //把Sheet定位到第一个
            Worksheet wsh = (Worksheet)xBook.Sheets[1];
            wsh.Activate();

           

        }

调试监视：

以下是generate方法，调用的fill方法<带excel-sheet表头>：

        public bool Generate(Hashtable  hash,string SheetName,int i)
        {

            System.Data.DataTable dt1 = (System.Data.DataTable)hash["dt"+i.ToString()];
            sheet.Name = SheetName;
            sheet.Tab.Color = 0xFFFF;

            if (dt1.Rows.Count == 0)
            { return false; }

            Fill(dt1, startRowIndex, startColIndex, true);

            //设置列标题栏位
            IT_Check_TitleStyle(dt1, sheet, dt1.Rows.Count);

            //增加筛选功能
            IT_Check_HeaderFileter(dt1,sheet);

            return true;
        }

protected void Fill(System.Data.DataTable dt, int rowStart, int colStart, bool isFormat)
        {
            int p = 80000;
            for (int beginIndex = 0; beginIndex < dt.Rows.Count; beginIndex += p)
            {
                int endIndex = dt.Rows.Count - 1;
                if (beginIndex + p < dt.Rows.Count)
                {
                    endIndex = beginIndex + p - 1;
                }

                //dt先填充到二维数组中，再添加到range对象效率会高，用时变少
                //填充sheet的列名
                object[,] arr = new object[endIndex - beginIndex + 2, dt.Columns.Count];

                    for (int i = 0; i < dt.Columns.Count;i++ )
                    {
                        arr[0,i]=dt.Columns[i].ColumnName;
                    }

                    for (int i = beginIndex; i <= endIndex; i++)
                    {
                        for (int j = 0; j < dt.Columns.Count; j++)
                        {
                            arr[i - beginIndex +1, j] = dt.Rows[i][j].ToString().Replace("=", "");
                        }
                    }
                Range range = sheet.get_Range(sheet.Cells[rowStart + beginIndex + 1, colStart + 1], sheet.Cells[rowStart + endIndex + 2, colStart + dt.Columns.Count]);
                range.Rows.NumberFormat = "@";//在填充之前先设置整个range是text类型
                if (isFormat)
                {
                
                    //    range.NumberFormat = "#,##0.00";

                }
                range.Value2 = arr;//二维数组填充到range
                range.Borders.LineStyle = XlLineStyle.xlContinuous;
                range.Columns.EntireColumn.AutoFit();//设置列宽自动适应
              

            }
        }

 另：回顾一下Break/Continue的用法：

循环的定义是程序段执行完了以后，再次判断条件，若条件为真，则继续执行该程序段。而在switch结构当中，只是该程序段执行完了之后，就继续执行下面的语句。因此很明显switch结构不是循环。循环有重复、反复执行的功能。

break是跳出整个循环，而continue是结束本次循环！进入下一次循环！
break是不是只针对 for、while、switch 起作用，break的用处可以有两个：
第一：用在switch结构当中的case语句的后面，作用是不再执行后面的case语句，结束switch结构。<选择，退出分支，是条件控制语句，可以用ifelse代替>
第二：用在循环当中，作用是终止该循环的执行，继续执行程序中循环下面的语句。如果有嵌套，只能跳出一层。<结束循环，即跳出与当前该语句最近的循环>如：for循环内if判断语句为真break，则会跳出for循环

例：遍历dr in DataTable，向DB逐条insert语句插入数据，对每dr进行条件筛选，如不符合，则添加errorMsg发送邮件，并结束本次循环，开始下一条dr：

        private void POS_3C_Sale_DSG(string strExrName, string strPathFileName, string strFileName, string FileName, string DataRange, string strCountryCode)
        {
            var dt = ReadExcelToTable(strPathFileName);
                    //dt.Rows.RemoveAt(0);
                    SqlConnection con = new SqlConnection(Connstr);
                    SqlCommand cmd = new SqlCommand();
                    cmd.Connection = con;
                    con.Open();
                    int num = 0, num1 = 0;
                    string strHead = "insert into POS3C_Sale(DataRange,SaleDate,C3AcerRegionTemp,C3ProvinceTemp,C3CityTemp,C3Code,DataType,C3BigAreaCode,C3BigAreaName,C3BranchCode,C3BranchName,C3StoreCode,C3StoreName,C3ProductCode,C3AcerProductCode,C3ProductName,C3BiProductName,C3Brand,C3ProductType1,C3ProductType2,C3ProductType2Name,C3CustomerCode,C3CustomerName,C3ChannelType,C3ChannelName,SaleQty,C3BuyType,C3BuyOrganize,C3ShipAddr,C3SellType,C3OtherInfo1,C3OtherInfo2,C3OtherInfo3,C3OtherInfo4,C3OtherInfo5,C3AcerStoreCode,C3AcerStoreName,DataSource,InsertDate) values ", 
                           strError = "";

                    Dictionary<DataRow, string> ExcelList = new Dictionary<DataRow, string>();
                    foreach (DataRow dr in dt.Rows)
                    {
                        num1++;
                        try
                        {
                            string DataRang = DataRange;
                            string SaleDate = dr[0].ToString();
                            DateTime date;
                            string C3AcerRegionTemp=dr[1].ToString();
                            string C3ProvinceTemp=dr[2].ToString();
                            string C3CityTemp = dr[3].ToString();
                            //C3Code-->strCountryCode
                            string DataType = (DataRange.IndexOf("w")>-1?"Weekly":"Monthly");
                            string C3BigAreaCode = "";
                            string C3BigAreaName = "";
                            string C3BranchCode = "";
                            string C3BranchName = "";
                            string C3StoreCode = "";//门店代码
                            string C3StoreName = "";//门店名称
                            string C3ProductCode = "";
                            string C3AcerProductCode = dr[8].ToString();
                            string C3ProductName = "";
                            string C3BiProductName = "";
                            string C3Brand = "";
                            string C3ProductType1 = "";
                            string C3ProductType2 = "";
                            string C3ProductType2Name = "";
                            string C3CustomerCode = "";
                            string C3CustomerName = "";
                            string C3ChannelType = "";
                            string C3ChannelName = "";
                            int SaleQty = dr[10].ToString() == "" ? 0 : Convert.ToInt32(dr[10]);
                            string C3BuyType="";
                            string C3BuyOrganize="";
                            string C3ShipAddr="";
                            string C3SellType="";
                            string C3OtherInfo1="";
                            string C3OtherInfo2="";
                            string C3OtherInfo3 = "";
                            string C3OtherInfo4 = "";
                            string C3OtherInfo5 = "";
                            string C3AcerStoreCode = dr[5].ToString();
                            string C3AcerStoreName = dr[6].ToString();
                            string DataSource = strFileName;
                            //string InserData=DateTime.Now.ToString();

                            if (SaleDate == "" || C3AcerProductCode == "")//|| C3AcerStoreCode == "" || C3AcerStoreName == ""
                            {
                                strError += "数据问题

";
                                num++;
                                var Collect = SaleDate == "" ? "销售日期 " : "";
                                Collect += C3AcerProductCode == "" ? "料号信息 " : "";
                                //Collect += C3AcerStoreCode == "" ? "32门店代码 " : "";
                                //Collect += C3AcerStoreName == "" ? "32门店名称 " : "";
                                ExcelList.Add(dr, Collect + "为空");
                                continue;
                            }
                            if (!DateTime.TryParse(SaleDate.ToString(), out date))
                            {
                                SaleDate = "1990-1-1";
                            }
                            else
                            {
                                SaleDate = date.ToString("yyyy-MM-dd");
                            }
                            string strTail = "('" + DataRange + "','"+ SaleDate + "','" + C3AcerRegionTemp + "','" + C3ProvinceTemp + "','" + C3CityTemp + "','" + strCountryCode + "','" +
                                DataType + "','" + C3BigAreaCode + "','" + C3BigAreaName + "','" + C3BranchCode + "','" + C3BranchName + "','" + C3StoreCode + "','" + C3StoreName + "','" + C3ProductCode + "','" + C3AcerProductCode + "','" + C3ProductName + "','" + C3BiProductName + "','"
                                + C3Brand + "','" + C3ProductType1 + "','" + C3ProductType2 + "','" + C3ProductType2Name + "','" + C3CustomerCode + "','" + C3CustomerName + "','" + C3ChannelType + "','"
                                + C3ChannelName + "'," + SaleQty + ",'" + C3BuyType + "','" + C3BuyOrganize + "','" + C3ShipAddr + "','" + C3SellType + "','" + C3OtherInfo1 + "','" + C3OtherInfo2 + "','" + C3OtherInfo3 + "','" + C3OtherInfo4 + "','" + C3OtherInfo5 + "','"
                                + C3AcerStoreCode + "','" + C3AcerStoreName + "','" + DataSource + "',"+ "getdate())";
                            cmd.CommandText = strHead + strTail;
                            cmd.ExecuteNonQuery();
                        }
                        catch (Exception ex)
                        {
                            strError += ex.Message + "

";
                            num++;
                            ExcelList.Add(dr, ex.Message);
                        }

                    }
                    con.Close();
                    Helper.AutomaticExcle(sErrorDirectory + FileName, @"销售日期,专区,省份,城市,销售门店,32门店代码,32门店名称,编码,料号,描述,数量", ExcelList, "POS3C_Sale");
                    var CurrentTime = DateTime.Now.ToString("yyyy-MM-dd");
                    Helper.SavaPOS_3CLog("

" + strFileName + "

" + "成功：" + (num1-num) + "条，失败" + num + "条。", POS3CLog);
                    Helper.SavaPOS_3CLog(strFileName + "

" + strError, SaleLog);
                    if (num == 0)
                    {
                        var ErrorContents = strFileName + "。excel中一共有" + num1 + "行数据,成功导入数据：" + num1 + "行。";
                        Mail.SendMail("(" + strCountryCode + ")POS3C Sale信息导入成功" + CurrentTime, "", ErrorContents);
                    }
                    else
                    {
                        sMoveDirectory = sErrorDirectory;
                        strError = strFileName + "		错误信息！";
                        var ErrorContents = strFileName + "。 excel中一共有" + num1 + "行数据, 实际成功导入：" + (num1 - num) + "行。

执行失败：" + num + "行。详细信息请看附件";
                        Mail.SendMail("(" + strCountryCode + ")POS3C Sale错误信息" + CurrentTime, sErrorDirectory + FileName, ErrorContents);
                    }
                    //移动到的路径
                    string SubdirectoryPath = sMoveDirectory + "\" + DateTime.Now.ToString("yyyy-MM") + "\";
                    if (!System.IO.Directory.Exists(SubdirectoryPath))
                    {
                        System.IO.Directory.CreateDirectory(SubdirectoryPath);
                    }
                    //使用复制为了覆盖文件夹下已有的该文件
                    File.Move(strPathFileName, SubdirectoryPath + "\" + strFileName);
        }