打开XML：如何添加行和单元格值在现有Excel文件中使用c＃添加新工作表之后

我使用开放的XML在现有的Excel文件中插入/附加新工作表，但我无法添加行和单元格值。 以下是我的代码：

using (var workbook = SpreadsheetDocument.Open(excelFilePath, true)) { var workbookPart = workbook.WorkbookPart; var wb = workbookPart.Workbook; int rowIndex = 0; // Add a blank WorksheetPart. WorksheetPart newWorksheetPart = workbook.WorkbookPart.AddNewPart<WorksheetPart>(); newWorksheetPart.Worksheet = new Worksheet(new SheetData()); Sheets sheets = workbook.WorkbookPart.Workbook.GetFirstChild<Sheets>(); string relationshipId = workbook.WorkbookPart.GetIdOfPart(newWorksheetPart); // Get a unique ID for the new worksheet. uint sheetId = 1; if (sheets.Elements<Sheet>().Count() > 0) { sheetId = sheets.Elements<Sheet>().Select(s => s.SheetId.Value).Max() + 1; } // Give the new worksheet a name. string sheetName = "Data"; // Append the new worksheet and associate it with the workbook. Sheet dataSheet = new Sheet() { Id = relationshipId, SheetId = sheetId, Name = sheetName }; sheets.Append(sheet); workbookPart.Workbook.Save(); var sharedStringPart = workbookPart.SharedStringTablePart; var values = sharedStringPart.SharedStringTable.Elements<SharedStringItem>().ToArray(); Row headerRow = new Row(); Cell cell = new Cell(); cell.DataType = CellValues.String; cell.CellValue = new CellValue("EmpId"); headerRow.AppendChild<Cell>(cell); cell = new Cell(); cell.DataType = CellValues.String; cell.CellValue = new CellValue("Name"); headerRow.AppendChild<Cell>(cell); headerRow.AppendChild<Cell>(cell); dataSheet.InsertAt<Row>(headerRow, rowIndex++); workbookPart.Workbook.Save(); } } 

这是抛出一个例外：

非复合元素没有子元素。