“外部表格不是预期的格式”

我尝试用Excel数据填充DataSet（通过OpenXML库来获取表名），但有时我得到错误：“外部表格不是预期的格式”。

所以，我使用相同的文件= * .xlsx（我通过Excel 2010将它从* .xls转换为* .xlsx）。

昨天工作正常，但现在它不工作：

public DataTable CreateTable(string sheetName) { sheetName = sheetName + "$"; bool hasHeaders = false; string HDR = hasHeaders ? "Yes" : "No"; string strConn; if (_filePath.Substring(_filePath.LastIndexOf('.')).ToLower() == ".xlsx") strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + _filePath + ";Extended Properties=\"Excel 12.0;HDR=" + HDR + ";IMEX=0\""; // strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + _filePath + ";Extended Properties=Excel 12.0;"; else strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + _filePath + ";Extended Properties=\"Excel 8.0;HDR=" + HDR + ";IMEX=0\""; try { OleDbConnection conn = new OleDbConnection(strConn); System.Data.DataSet dtSet; System.Data.OleDb.OleDbDataAdapter oleCommand; oleCommand = new System.Data.OleDb.OleDbDataAdapter("select * from [" + sheetName + "]", conn); oleCommand.TableMappings.Add("Table", sheetName); dtSet = new System.Data.DataSet(); oleCommand.Fill(dtSet); oleCommand.Dispose(); conn.Close(); return dtSet.Tables[0]; } catch (Exception ex) { //log here } throw new NullReferenceException(); } 

我从Excel文件中获取工作表名称，向其中添加$并尝试将其填充到数据集中。

但是在线：

 oleCommand.Fill(dtSet); it throw exception. 

但有些时候会转到下一行。 我尝试从其他来源重新复制此文件，但现在可以工作。

请告诉我如何解决我的问题！

PS可能是当我打开这个文件的OpenXML我腐败了吗？

OpenXml部分（ExcelHelper类）：

  public ExcelHelper(String filePath, bool isEditable) { _filePath = filePath; _isEditable = isEditable; } public List<String> GetSheetNameColl() { if (_spreadSheetDoc == null) throw new NullReferenceException("_spreadSheetDoc is null!"); List<String> sheetNameColl=new List<string>(); int sheetIndex = 0; WorkbookPart workbookPart = _spreadSheetDoc.WorkbookPart; foreach (WorksheetPart worksheetpart in _spreadSheetDoc.WorkbookPart.WorksheetParts) { Worksheet worksheet = worksheetpart.Worksheet; // Grab the sheet logFileName each time through your loop string sheetName = workbookPart.Workbook.Descendants<Sheet>().ElementAt(sheetIndex).Name; sheetNameColl.Add(sheetName); Console.WriteLine(sheetName+" "+sheetIndex); sheetIndex++; } return sheetNameColl; } public SpreadsheetDocument Open() { try { _spreadSheetDoc = SpreadsheetDocument.Open(_filePath, _isEditable); isLoaded = true; return _spreadSheetDoc; } catch (Exception ex) { //log here } throw new NullReferenceException("Error at Open() method"); } public void Close() { if (_spreadSheetDoc != null) { _spreadSheetDoc.Close(); isLoaded = false; } } 

Program.cs中：

  ExcelHelper excel = new ExcelHelper(@"MyFile.xlsx", false); excel.Open(); var sheetNameColl = excel.GetSheetNameColl(); List<DataTable> dtColl = new List<DataTable> (sheetNameColl.Count); foreach (var sheetName in sheetNameColl) { var table = excel.CreateTable(sheetName); DataTableHelper dtHelper = new DataTableHelper(table); table = dtHelper.RenameColumns(); dtColl.Add(table); } excel.Close(); 

Answer 1

我的解决scheme是：

切换到EPPlus API – 它是免费的，更容易使用，并没有这个问题。

 /// <summary> /// Manipulate an excel file using the EPPlus API, free from http://epplus.codeplex.com/ /// License terms (Public) on http://epplus.codeplex.com/license /// /// </summary> public class ExcelWriter : IDisposable { ExcelPackage _pck; /// <summary> /// Open a new or existing file for editing. /// </summary> /// <param name="fileName"></param> public ExcelWriter(string fileName) { _pck = new ExcelPackage(new FileInfo(fileName)); } /// <summary> /// Open a new or existing file for editing, and add a new worksheet with the data /// </summary> /// <param name="fileName"></param> /// <param name="newWorksheetName">new sheet to add</param> /// <param name="dtData">data to add</param> public ExcelWriter(string fileName, string newWorksheetName, DataTable dtData):this(fileName) { var ws = this.AddWorksheet(newWorksheetName); this.SetValues(ws, dtData); } /// <summary> /// Add a new worksheet. Names must be unique. /// </summary> /// <param name="name"></param> /// <returns></returns> public ExcelWorksheet AddWorksheet(string name) { return _pck.Workbook.Worksheets.Add(name); } /// <summary> /// Add a new picture. Names must be unique. /// </summary> /// <param name="image"></param> /// <param name="imageName"></param> /// <param name="ws"></param> /// <param name="row"></param> /// <param name="col"></param> public ExcelPicture AddPicture(Image image, string imageName, ExcelWorksheet ws, int row, int col) { var pic = ws.Drawings.AddPicture(imageName, image); pic.SetPosition(row, 0, col, 0); pic.Border.LineStyle = eLineStyle.Solid; return pic; } /// <summary> /// Note: this will only perform as well as 'SetValues' if you load/write data from left to right, top to bottom. Otherwise it may perform poorly. /// </summary> /// <param name="ws"></param> /// <param name="row"></param> /// <param name="col"></param> /// <param name="value"></param> public void SetValue(ExcelWorksheet ws, int row, int col, object value) { ws.Cells[row, col].Value = value; } /// <summary> /// Populate a large number of cells at once /// </summary> /// <param name="ws"></param> /// <param name="value">Data to load</param> public void SetValues(ExcelWorksheet ws, List<object[]> value) { ws.Cells.LoadFromArrays(value); } /// <summary> /// Populate a large number of cells at once /// </summary> /// <param name="ws"></param> /// <param name="value">Data to load</param> public void SetValues(ExcelWorksheet ws, DataTable dt) { ws.Cells.LoadFromDataTable(dt, true); } public void SetDefaultRowHeight(ExcelWorksheet ws, int rowHeight) { ws.DefaultRowHeight = rowHeight; } /// <summary> /// Saves to file and dispos /// </summary> public void Save() { _pck.Save(); } /// <summary> /// Release all resources /// </summary> public void Dispose() { if (_pck != null) _pck.Dispose(); } } // class