C# 生成多张excel 并打包

自述：在工作中遇到很多有趣的需求，在实施过程中看到了自己的很多不足。 
仅在这里记录收获，积累成就感，愉悦自己，感谢他人！

// 

/// 将数据部分处理生成excel 并打包成zip
/// 
/// "datas">数据列表
public static void CreatZip(List.AmmeterProportionLog_Aduit_Export> datas)
        {
            HttpContext curContext = HttpContext.Current;
            curContext.Response.ContentType = "application/zip";
            curContext.Response.ContentEncoding = Encoding.UTF8;
            curContext.Response.Charset = "";
            curContext.Response.AppendHeader("Content-Disposition",
                "attachment;filename=" + HttpUtility.UrlEncode(DateTime.Now.ToString("yyyyMMddhhmmss") + ".zip", Encoding.UTF8));
            //处理数据生成excel表 以K_V形式保存 Workbooks
           Dictionary Workbooks = new Dictionary();            
            datas.ForEach(p => Workbooks.Add(p.txtAmmeterNum, Export0(p)));
            //遍历Workbooks 生成zip文件 
            curContext.Response.BinaryWrite(PackageManyZip(Workbooks).GetBuffer());
            curContext.Response.End();
            curContext.Response.Close();
        }

//生成excel表  截取表的部分显示

public static HSSFWorkbook Export2(AmmeterProportionLogBll.AmmeterProportionLog_Aduit_Export m) 
{ 
HSSFWorkbook workbook = new HSSFWorkbook(); 
ISheet sheet = workbook.CreateSheet(“Sheet1”);

        //设置6列  表中涉及多张图片处理
        sheet.SetColumnWidth(0, 20 * 256 + 200);
        sheet.SetColumnWidth(1, 20 * 256 + 200);
        sheet.SetColumnWidth(2, 20 * 256 + 200);
        sheet.SetColumnWidth(3, 20 * 256 + 200);
        sheet.SetColumnWidth(4, 20 * 256 + 200);
        sheet.SetColumnWidth(5, 20 * 256 + 200);

        ICellStyle dateStyle = workbook.CreateCellStyle();
        IDataFormat format = workbook.CreateDataFormat();
        dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd");
        int rowIndex = 0;//行标记

        #region 表头及样式
        {
            IRow headerRow = sheet.CreateRow(rowIndex);
            headerRow.HeightInPoints = 25;               
            headerRow.CreateCell(0).SetCellValue("Excel大标题");

            ICellStyle headStyle = workbook.CreateCellStyle();
            headStyle.Alignment = HorizontalAlignment.Center;
            headStyle.VerticalAlignment = VerticalAlignment.Center;

            IFont font = workbook.CreateFont();
            font.FontHeightInPoints = 20;
            font.Boldweight = 700;
            headStyle.SetFont(font);
            headerRow.GetCell(0).CellStyle = headStyle;
            //合并单元格
            sheet.AddMergedRegion(new NPOI.SS.Util.CellRangeAddress(rowIndex, rowIndex, 0, 5));
            rowIndex++;
        }
        #endregion

        #region 两种样式
        ICellStyle CellStyle = workbook.CreateCellStyle();
        CellStyle.Alignment = HorizontalAlignment.Left;
        CellStyle.VerticalAlignment = VerticalAlignment.Center;
        //字体
        IFont CellFont = workbook.CreateFont();
        CellFont.FontHeightInPoints = 10;
        CellFont.Boldweight = 700;
        CellStyle.SetFont(CellFont);
        ICellStyle rightheadStyle = workbook.CreateCellStyle();
        rightheadStyle.Alignment = HorizontalAlignment.Right;
        rightheadStyle.VerticalAlignment = VerticalAlignment.Center;
        //文本样式 2
        IFont rightfont = workbook.CreateFont();
        rightfont.FontHeightInPoints = 10;
        rightfont.Boldweight = 700;
        rightheadStyle.SetFont(rightfont);
        #endregion

        #region 区域、核查日期
        {
            rowIndex++;
            IRow headerRow = sheet.CreateRow(rowIndex);
            headerRow.HeightInPoints = 20;
            headerRow.CreateCell(0).SetCellValue("区域：" + m.hfAreaName);
            headerRow.GetCell(0).CellStyle = CellStyle;
            sheet.AddMergedRegion(new NPOI.SS.Util.CellRangeAddress(rowIndex, rowIndex, 0, 1));

            headerRow.CreateCell(2).SetCellValue("核查日期：" + m.txtCurrentDateInfo.ToString());
            headerRow.GetCell(2).CellStyle = CellStyle;
            sheet.AddMergedRegion(new NPOI.SS.Util.CellRangeAddress(rowIndex, rowIndex, 2, 5));

            rowIndex++;
        }
        #endregion

        #region 分别呈现A单位 B单位 C单位的图片X张(0<=X<=12) 每个单位占2列
        {
            int R_CMCCP = DealPhoto(sheet, workbook, m.tdPhoto_CMCCP, rowIndex, 0, 12);
            int R_CTCCP = DealPhoto(sheet, workbook, m.tdPhoto_CTCCP, rowIndex, 2, 12);
            int R_CUCCP = DealPhoto(sheet, workbook, m.tdPhoto_CUCCP, rowIndex, 4, 12);
            rowIndex = Math.Max(Math.Max(R_CMCCP, R_CTCCP), R_CUCCP);
        }
        #endregion

        return workbook;
    }

/// 

/// 分别对多张图片进行列表呈现
/// 
/// 图片路径
/// 起始列
/// 限制显示图片张数/param>
 private static int DealPhoto(ISheet sheet, HSSFWorkbook workbook, string Path, int rowIndex, int StartCol, int MaxNum)
        {
            int RowNum = rowIndex - 1;
            if (Path != "")
            {
                string[] paths = Path.Split(';');
                int i = 0;
                for (i = 0; i < paths.Length && i < MaxNum; i++)
                {
                    if (i % 2 == 0)
                    {
                        IRow headerRow = sheet.CreateRow(rowIndex + i / 2);
                        headerRow.HeightInPoints = 80;
                        RowNum++;
                    }
                    AddPieChartMerage(sheet, workbook, paths[i], RowNum, StartCol + i % 2, 0);
                }
            }
            else
            {
                IRow headerRow = sheet.CreateRow(rowIndex);
                headerRow.HeightInPoints = 80;
                sheet.AddMergedRegion(new NPOI.SS.Util.CellRangeAddress(rowIndex, rowIndex, StartCol, StartCol + 1));
                RowNum++;
            }
            return ++RowNum;
        }

//图片处理
 private static void AddPieChartMerage(ISheet sheet, HSSFWorkbook workbook, string totalFileURL, int row, int col, int MerageColCount)
        {
            try
            {
                HSSFPatriarch patriarch = (HSSFPatriarch)sheet.CreateDrawingPatriarch();
                //照片位置，（col, row）第row+1行col+1列，右下角为（ col +1, row +1）第 col +1+1行row +1+1列，宽为100，高为50
                HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 100, 50, col, row, col + 1, row + 1);
                int i = 0;
                foreach (var fileurl in totalFileURL.Split(';'))
                {
                    string path = fileurl;//图片路径
                    byte[] bytes = System.IO.File.ReadAllBytes(path);
                    if (!string.IsNullOrEmpty(path))
                    {
                        int pictureIdx = workbook.AddPicture(bytes, NPOI.SS.UserModel.PictureType.JPEG);
                        anchor = new HSSFClientAnchor(i * 100, 0, i * 100 + 100, 0, col, row, col + 1 + MerageColCount, row + 1);
                         HSSFPicture pict = (HSSFPicture)patriarch.CreatePicture(anchor, pictureIdx);
                        //pict.Resize();用图片原始大小来显示
                    }
                    i++;
                }
            }
            catch (Exception)
            {
                //throw ex;
            }
        }

//生成zip文件

public static MemoryStream PackageManyZip(Dictionary<string, HSSFWorkbook> Workbooks)
        {
            byte[] buffer;
            MemoryStream returnStream = new MemoryStream();
            var zipMs = new MemoryStream();
            using (ZipOutputStream zipStream = new ZipOutputStream(zipMs))
            {
                zipStream.SetLevel(7);//压缩程度
                foreach (var kv in Workbooks)
                {
                    string fileName = kv.Key;//文件名为AmmeterNum
                    using (MemoryStream ms = new MemoryStream())
                    {
                        kv.Value.Write(ms);                        
                        ms.Position = 0;
                        var streamInput = ms;
                        buffer = new byte[streamInput.Length];
                        zipStream.PutNextEntry(new ZipEntry(fileName));
                        while (true)
                        {
                            var readCount = streamInput.Read(buffer, 0, buffer.Length);
                            if (readCount > 0)
                            {
                                zipStream.Write(buffer, 0, readCount);
                            }
                            else
                            {
                                break;
                            }
                        }
                        ms.Flush();
                    }
                    zipStream.Flush();
                }
                zipStream.Finish();
                zipMs.Position = 0;
                zipMs.CopyTo(returnStream, 5600);
            }
            returnStream.Position = 0;
            return returnStream;
        }

效果如下：

注：excel 和压缩的处理稍显粗糙。期待改进！

一路积累，一路成长！欢迎见证！