Question

我想合并单元格是excel。通过使用DOM方法，我可以轻松完成。但是由于我的excel文件太大，当我试图获取工作表时，它会抛出内存不足异常。所以我必须使用SAX方法来读取excel文件。但我不知道如何在这种方法中合并细胞。搜索了很多，但每个人都提供了DOM方法的解决方案。

任何人都可以提供帮助，在此先感谢。

Answer 1

您可以使用EPPlus执行此操作：

using (ExcelPackage package = new ExcelPackage(new FileInfo(@"C:\Temp\example.xlsx")))
        {
            ExcelWorksheet ws = package.Workbook.Worksheets.First();
            ws.Cells["A1:A2"].Merge = true;
            package.Save();
        }

Answer 2

我的解决方案是：通过openxmlreader从旧工作表中读取全部数据，而不是通过openxmlwriter写入新工作表中，因此我可以在将数据写入sheetdata元素后添加合并单元格元素。

using (SpreadsheetDocument myDoc = SpreadsheetDocument.Open(YourExcelfileName, true))
        {
            // Create reference of main Workbook part, which contains all reference.
            WorkbookPart objworkbook = myDoc.WorkbookPart;

            // pick up first worksheet
            WorksheetPart objworksheet = objworkbook.WorksheetParts.First();

            // will be used in end while creating sheet data
            string objorigninalSheetId = objworkbook.GetIdOfPart(objworksheet);
            WorksheetPart objreplacementPart = objworkbook.AddNewPart<WorksheetPart>();
            string objreplacementPartId = objworkbook.GetIdOfPart(objreplacementPart);

            Sheets sheets = objworkbook.Workbook.Sheets;
            Sheet sheet = new Sheet() { Id = workbookPart.GetIdOfPart(objreplacementPart), SheetId = 2, Name = "Sheet" };
            sheets.Append(sheet);

            // Create object reader to read from excel file.
            OpenXmlReader objreader = OpenXmlReader.Create(objworksheet);

            // create writer object to write in excel sheet.
            OpenXmlWriter objOpenXmwriter = OpenXmlWriter.Create(objreplacementPart);

            objOpenXmwriter.WriteStartElement(new Worksheet());
            objOpenXmwriter.WriteStartElement(new SheetData());


            while (objreader.Read())
            {
            //read the context of original sheetdata.
            //then put all data to new sheetdata by openxmlwriter

            }

            // this is for Sheetdata
            objOpenXmwriter.WriteEndElement();

            //* after Sheetdata you can merge cells by openxmlwriter like that:    

            objOpenXmwriter.WriteStartElement(new MergeCells());
            objOpenXmwriter.WriteElement(new MergeCell() { Reference = "P1:Q1" });
            objOpenXmwriter.WriteElement(new MergeCell() { Reference = "R1:S1" });
            objOpenXmwriter.WriteEndElement();

            // this is for Worksheet
            objOpenXmwriter.WriteEndElement();

            //close all objects
            objreader.Close();
            objOpenXmwriter.Close();

            Sheet sheetreplace = objworkbook.Workbook.Descendants<Sheet>().Where(s => s.Id.Value.Equals(objorigninalSheetId)).First();
            sheetreplace.Id.Value = objreplacementPartId;
            objworkbook.DeletePart(objworksheet);

        }

使用Openxml writer在Excel中合并单元格的方式如下：

objOpenXmwriter.WriteStartElement(new MergeCells());
objOpenXmwriter.WriteElement(new MergeCell() { Reference = "P1:Q1" });
objOpenXmwriter.WriteElement(new MergeCell() { Reference = "R1:S1" });
objOpenXmwriter.WriteEndElement();

参考文献：

Merge cell example

Merge cell function

openxmlwriter example

使用＆＃34; Openxml writer＆＃34;在Excel中合并单元格。

2 个答案: