我尝试用Excel数据填充DataSet（通过OpenXML库获取工作表名称），但有时我收到错误： ＆＃34;外部表格不符合预期的格式＆＃34;。
所以，我使用相同的文件= * .xlsx（我通过Excel 2010将它从* .xls转换为* .xlsx）。
昨天它工作正常，但现在 - 它不起作用：
public DataTable CreateTable(string sheetName)
{
sheetName = sheetName + "$";
bool hasHeaders = false;
string HDR = hasHeaders ? "Yes" : "No";
string strConn;
if (_filePath.Substring(_filePath.LastIndexOf('.')).ToLower() == ".xlsx")
strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source="
+ _filePath + ";Extended Properties=\"Excel 12.0;HDR=" + HDR + ";IMEX=0\"";
// strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + _filePath + ";Extended Properties=Excel 12.0;";
else
strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + _filePath + ";Extended Properties=\"Excel 8.0;HDR=" + HDR + ";IMEX=0\"";
try
{
OleDbConnection conn = new OleDbConnection(strConn);
System.Data.DataSet dtSet;
System.Data.OleDb.OleDbDataAdapter oleCommand;
oleCommand = new System.Data.OleDb.OleDbDataAdapter("select * from [" + sheetName + "]", conn);
oleCommand.TableMappings.Add("Table", sheetName);
dtSet = new System.Data.DataSet();
oleCommand.Fill(dtSet);
oleCommand.Dispose();
conn.Close();
return dtSet.Tables[0];
}
catch (Exception ex)
{
//log here
}
throw new NullReferenceException();
}
我从Excel文件中获取工作表名称，向其添加$并尝试在数据集中填写。
但是在线：
oleCommand.Fill(dtSet); it throw exception.
但有时它会进入下一行。 我尝试从其他来源重新复制此文件，但它现在有效。
请告诉我如何解决这个问题！
P.S。可能是当我通过OpenXML打开这个文件我腐败了吗？
OpenXml部分（类ExcelHelper）：
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;
}
}
的Program.cs：
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();
答案 0 :(得分：2)
我的解决方案：
切换到EPPlus API - 它是免费的，更易于使用，并且没有此问题。
/// <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