C＃如何使用OpenXmlWriter（OpenXML SDK 2.5）將單元格附加到Excel工作表中的每一行

Question

我有一個非常大的Excel文件，需要在其中向每行追加100個新單元格。 因為OpenXML DOM方法給我一個OutOfMemory異常，所以我需要為我的項目使用OpenXmlWriter。

有人可以告訴我如何使用OpenXmlWriter將單元格追加到一行嗎？

這是我使用DOM方法的代碼：

                int nRowCounter = 0;
                foreach (Row row in sheetData.Elements<Row>())
                {
                    // skip first row
                    nRowCounter++;
                    if (nRowCounter == 1)
                        continue;


                    string uniqueID = row.Elements<Cell>().First().InnerText;


                    string[] branchenOfId = crmConnector.GetBranchenFromCrm(uniqueID, "");

                    if (listSelectedBranchen.Any() && !branchenOfId.Intersect(listSelectedBranchen).Any() && nBranchenIndex == 1)
                    {
                        rowsToRemove.Add(row.RowIndex.Value);
                        continue;
                    }

                    string cellValue = "";

                    if (branchenOfId.Contains(strName))
                        cellValue = strName;

                    row.Append(new Cell() { DataType = CellValues.String, CellValue = new CellValue(cellValue) });
                }

Answer 1

using (SpreadsheetDocument spreadsheetDocument = SpreadsheetDocument.Open(filename, true))
{

WorkbookPart workBookPart = spreadsheetDocument.WorkbookPart;

WorkbookPart workbookPart = spreadsheetDocument.WorkbookPart;
WorksheetPart worksheetPart = workbookPart.WorksheetParts.First();
SheetData sheetData = worksheetPart.Worksheet.Elements<SheetData>().First();

//You can retrieve a specific sheet also by the following code
IEnumerable<Sheet> sheets = workbookPart.Workbook.Descendants<Sheet>().Where(s => s.Name == "Sheet Name");

//find the first row in the sheet data
Row row1 = sheetData.GetFirstChild<Row>();

//create a new cell
//I is the column and 1 is the Row Index
// I assume you know how to get the last column of any row. 
//Just get the next alphabet letter and add the row index to make a CellReference.
//e.g. If last cell of the Row is H, you can get the next letter i-e I
Cell cell = new Cell() { CellReference = "I1" };
CellFormula cellformula = new CellFormula();
cellformula.Text = "IF(A2 = A1,1,0)";
cell.Append(cellformula);

//append the cell to the row
row1.Append(cell);
}

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