生产环境：Server 2008 R2，作为网络服务运行的应用程序池。 我在特定的生产线上遇到了这个问题，我无法理解为什么会失败。
使用堆栈跟踪记录：
2015-02-03 11:19:29,389,DEBUG,44,Before Test1
2015-02-03 11:19:29,389,DEBUG,44,Before Test2
2015-02-03 11:19:29,451,DEBUG,44,Before Getting Row
2015-02-03 11:19:29,451,DEBUG,44,After Getting Row
2015-02-03 11:19:29,826,DEBUG,44,Before Test1
2015-02-03 11:19:29,841,DEBUG,44,Before Test2
2015-02-03 11:19:29,841,DEBUG,44,Before Getting Row
2015-02-03 11:19:29,841,DEBUG,44,After Getting Row
2015-02-03 11:19:30,044,DEBUG,44,Before Test1
2015-02-03 11:19:30,060,DEBUG,44,Before Test2
2015-02-03 11:19:30,075,DEBUG,44,Before Getting Row
2015-02-03 11:19:30,075,DEBUG,44,After Getting Row
2015-02-03 11:19:30,138,DEBUG,44,Before Test1
2015-02-03 11:19:30,138,DEBUG,44,Before Test2
2015-02-03 11:19:30,356,DEBUG,44,Before Getting Row
2015-02-03 11:19:30,356,DEBUG,44,After Getting Row
2015-02-03 11:19:31,058,DEBUG,44,Before Test1
2015-02-03 11:19:31,074,DEBUG,44,Before Test2
2015-02-03 11:19:31,245,DEBUG,44,Before Getting Row
2015-02-03 11:19:31,245,DEBUG,44,After Getting Row
2015-02-03 11:19:31,729,DEBUG,44,Before Test1
2015-02-03 11:19:31,729,DEBUG,44,Before Test2
2015-02-03 11:19:31,745,DEBUG,44,Before Getting Row
2015-02-03 11:19:31,745,DEBUG,44,After Getting Row
2015-02-03 11:19:31,776,DEBUG,44,Before Test1
2015-02-03 11:19:31,791,DEBUG,44,Before Test2
2015-02-03 11:19:31,807,DEBUG,44,Before Getting Row
2015-02-03 11:19:31,807,DEBUG,44,After Getting Row
2015-02-03 11:19:31,869,DEBUG,44,Before Test1
2015-02-03 11:19:31,869,DEBUG,44,Before Test2
2015-02-03 11:19:31,885,DEBUG,44,Before Getting Row
2015-02-03 11:19:31,885,DEBUG,44,After Getting Row
2015-02-03 11:19:31,947,DEBUG,44,Before Test1
2015-02-03 11:19:31,947,DEBUG,44,Before Test2
2015-02-03 11:19:32,103,ERROR,44,Error exporting using template
System.ObjectDisposedException: Can not access a closed Stream.
at System.IO.Compression.DeflateStream.EnsureNotDisposed()
at MS.Internal.IO.Packaging.CompressStream.Flush()
at MS.Internal.IO.Zip.ZipIOLocalFileBlock.FlushExposedStreams()
at MS.Internal.IO.Zip.ZipIOLocalFileBlock.UpdateReferences(Boolean closingFlag)
at MS.Internal.IO.Zip.ZipIOBlockManager.SaveContainer(Boolean closingFlag)
at MS.Internal.IO.Zip.ZipIOBlockManager.SaveStream(ZipIOLocalFileBlock blockRequestingFlush, Boolean closingFlag)
at MS.Internal.IO.Zip.ZipIOModeEnforcingStream.Dispose(Boolean disposing)
at System.IO.Stream.Close()
at System.Xml.XmlUtf8RawTextWriter.Close()
at System.Xml.XmlWellFormedWriter.Close()
at DocumentFormat.OpenXml.OpenXmlPartRootElement.SaveToPart(OpenXmlPart openXmlPart)
at DocumentFormat.OpenXml.Packaging.OpenXmlPackage.SavePartContents()
at DocumentFormat.OpenXml.Packaging.OpenXmlPackage.Dispose(Boolean disposing)
at DocumentFormat.OpenXml.Packaging.OpenXmlPackage.Dispose()
at Metrico.DatumBase.BizLogic.ExporterBL.CreateSpreadsheetExportUsingTemplate(DataSet dataSet, String templatePath, String exportPath)
代码：
try
{
using (SpreadsheetDocument document = SpreadsheetDocument.Open(exportPath, true))
{
WorkbookPart workbookPart = document.WorkbookPart;
// Iterate through the DataTables, and populate the existing worksheets with the same names
for (int i = 1; i < dataSet.Tables.Count; i++)
{
// Grab the DataTable/Worksheet name from the first DataTable (like a Table of Contents)
var worksheetName = dataSet.Tables[0].Rows[i - 1].Field<string>("FriendlyName");
// Get the worksheet that has the same name
Sheet theSheet = workbookPart.Workbook.Descendants<Sheet>().FirstOrDefault(s => s.Name == worksheetName);
// Only attempt to process the sheet if it was found in the template
if (theSheet != null)
{
// Get the worksheet to read from
var worksheetPart = (WorksheetPart) workbookPart.GetPartById(theSheet.Id);
string originalSheetID = workbookPart.GetIdOfPart(worksheetPart);
// Make a copy of the worksheet to write to
var replacementPart = workbookPart.AddNewPart<WorksheetPart>();
string replacementPartID = workbookPart.GetIdOfPart(replacementPart);
// Create the reader for the original and the writer for the replacement
using (var reader = OpenXmlReader.Create(worksheetPart))
{
using (var writer = OpenXmlWriter.Create(replacementPart))
{
// Get the cell formats for the first non-header row
WorkbookStylesPart stylesPart = workbookPart.GetPartsOfType<WorkbookStylesPart>().First();
Logger.Log(LogLevel.Debug, "Before Test1");
var test1 = worksheetPart;
Logger.Log(LogLevel.Debug, "Before Test2");
var test2 = worksheetPart.Worksheet;
Logger.Log(LogLevel.Debug, "Before Getting Row");
Row firstContentRow = worksheetPart.Worksheet.Descendants<Row>().FirstOrDefault(r => r.RowIndex == 2);
Logger.Log(LogLevel.Debug, "After Getting Row");
Dictionary<string, uint> columnFormats = GetCellFormats(firstContentRow);
// Create a DateTime cell format style
var dateFormat = new CellFormat
{
NumberFormatId = UInt32Value.FromUInt32(22),
ApplyNumberFormat = BooleanValue.FromBoolean(true)
};
stylesPart.Stylesheet.CellFormats.Append(dateFormat);
UInt32Value dateStyleIndex = stylesPart.Stylesheet.CellFormats.Count;
stylesPart.Stylesheet.CellFormats.Count++;
// Read from the template worksheet and write to the new worksheet
while (reader.Read())
{
// We only care about altering the contents of the SheetData element
if (reader.ElementType == typeof (SheetData))
{
if (reader.IsEndElement)
{
continue;
}
// Write the start of the SheetData element
writer.WriteStartElement(new SheetData());
// Add column names to the first Excel row
var headerRow = new Row();
foreach (DataColumn column in dataSet.Tables[i].Columns)
{
var headerCell = CreateTextCell(
dataSet.Tables[i].Columns.IndexOf(column) + 1, 1, column.ColumnName, null);
headerRow.Append(headerCell);
}
// Write the head row element
writer.WriteElement(headerRow);
// Loop through each DataRow and populate the corresponding Excel row
for (int j = 0; j < dataSet.Tables[i].Rows.Count; j++)
{
var contentRow = dataSet.Tables[i].Rows[j];
Row row = CreateContentRow(contentRow, j + 2, columnFormats, dateStyleIndex);
// Write the row element
writer.WriteElement(row);
}
// Write the end of the SheetData element
writer.WriteEndElement();
}
else
{
// Automatically copy over all other elements
if (reader.IsStartElement)
{
writer.WriteStartElement(reader);
}
else if (reader.IsEndElement)
{
writer.WriteEndElement();
}
}
}
}
}
// Point the workbook to the new sheet and delete the old one
Sheet sheet = workbookPart.Workbook.Descendants<Sheet>().First(s => s.Id.Value.Equals(originalSheetID));
sheet.Id.Value = replacementPartID;
workbookPart.DeletePart(worksheetPart);
}
}
//This section will remove data from sheets that have not been populated, leaving the header row intact
List<string> emptyTasks = new List<string>
{
"task",
};
var currentTasks =
dataSet.Tables[0].AsEnumerable()
.Select(x => x.Field<string>("FriendlyName").ToString(CultureInfo.InvariantCulture))
.ToList();
foreach (string task in currentTasks.Where(emptyTasks.Contains))
{
emptyTasks.Remove(task);
}
foreach (string task in emptyTasks)
{
Sheet theSheet = workbookPart.Workbook.Descendants<Sheet>().FirstOrDefault(s => s.Name == task);
if (theSheet != null)
{
WorksheetPart worksheetPart = (WorksheetPart) workbookPart.GetPartById(theSheet.Id);
SheetData sheetData = worksheetPart.Worksheet.GetFirstChild<SheetData>();
sheetData.Elements<Row>().Where(r => r.RowIndex > 1).ToList().ForEach(x => x.Remove());
theSheet.Elements<Row>().ToList().ForEach(x => x.Remove());
worksheetPart.Worksheet.Save();
}
}
workbookPart.Workbook.CalculationProperties.ForceFullCalculation = true;
workbookPart.Workbook.CalculationProperties.FullCalculationOnLoad = true;
}
}
catch (Exception ex)
{
Logger.Log(LogLevel.Error, "Error exporting using template ", ex);
throw;
}
正如您所看到的那样，它成功运行了几次这个循环，然后它似乎只是在访问工作表时中断了？ WTF？这似乎也不会发生在每个服务器上。任何想法都被赞赏，因为我没有想法。
另外值得注意的是：即使抛出异常，似乎某些东西仍然锁定了这个文件。如果我尝试复制我得到的文件：该操作无法完成，因为该文件在w3wp.exe中打开。“所以文件不会被处理掉？
将应用程序池更改为“LocalSystem”可防止抛出异常，但会导致系统锁定。它在完全相同的位置失败，但不会抛出异常并且在进程中没有得到任何进一步（该文件与其他失败文件的大小完全相同，并且日志是相同的）。
将try / catch移动到using语句中会暴露一个新的异常：
2015-02-04 09:45:23,577,ERROR,6,Error exporting using template
System.IO.IsolatedStorage.IsolatedStorageException: Unable to create mutex. (Exception from HRESULT: 0x80131464)
at System.IO.IsolatedStorage.IsolatedStorageFile.Open(String infoFile, String syncName)
at System.IO.IsolatedStorage.IsolatedStorageFile.Lock(Boolean& locked)
at System.IO.IsolatedStorage.IsolatedStorageFileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, IsolatedStorageFile isf)
at System.IO.IsolatedStorage.IsolatedStorageFileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, IsolatedStorageFile isf)
at MS.Internal.IO.Packaging.PackagingUtilities.SafeIsolatedStorageFileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, ReliableIsolatedStorageFileFolder folder)
at MS.Internal.IO.Packaging.PackagingUtilities.CreateUserScopedIsolatedStorageFileStreamWithRandomName(Int32 retryCount, String& fileName)
at MS.Internal.IO.Packaging.SparseMemoryStream.EnsureIsolatedStoreStream()
at MS.Internal.IO.Packaging.SparseMemoryStream.SwitchModeIfNecessary()
at MS.Internal.IO.Packaging.DeflateEmulationTransform.Decompress(Stream source, Stream sink)
at MS.Internal.IO.Packaging.CompressEmulationStream..ctor(Stream baseStream, Stream tempStream, Int64 position, IDeflateTransform transformer)
at MS.Internal.IO.Packaging.CompressStream.ChangeMode(Mode newMode)
at MS.Internal.IO.Packaging.CompressStream.Seek(Int64 offset, SeekOrigin origin)
at MS.Internal.IO.Zip.ZipIOModeEnforcingStream.Read(Byte[] buffer, Int32 offset, Int32 count)
at System.Xml.XmlTextReaderImpl.InitStreamInput(Uri baseUri, String baseUriStr, Stream stream, Byte[] bytes, Int32 byteCount, Encoding encoding)
at System.Xml.XmlTextReaderImpl.FinishInitStream()
at System.Xml.XmlReaderSettings.CreateReader(Stream input, Uri baseUri, String baseUriString, XmlParserContext inputContext)
at DocumentFormat.OpenXml.OpenXmlPartRootElement.LoadFromPart(OpenXmlPart openXmlPart, Stream partStream)
at DocumentFormat.OpenXml.Packaging.OpenXmlPart.LoadDomTree[T]()
at DocumentFormat.OpenXml.Packaging.WorksheetPart.get_Worksheet()
at Metrico.DatumBase.BizLogic.ExporterBL.CreateSpreadsheetExportUsingTemplate(DataSet dataSet, String templatePath, String exportPath)
答案 0 :(得分：2)
今天我读到了OpenXML SDK（2.5及以下版本）中的一个令人讨厌的错误，它可能是这些异常的来源。
该错误仅在非常特定的情况下发生。 System.IO.Packaging使用IsolatedStorage文件＆gt; 10MB但如果两个线程或可执行文件尝试访问它将失败。
System.IO.Packaging中存在一个错误，它在某些情况下会导致在Web前端使用Open XML SDK实现的Open XML功能时抛出虚假的ObjectDisposedException和NullReferenceException。此错误的要点是，如果System.IO.Packaging的内部内存使用率超过10MB的阈值，则System.IO.Packaging使用System.IO.IsolatedStorage，如果两个可执行文件或线程同时尝试访问它，则会发生故障。当使用具有相同强名称的多个exes（就像我们将在多个Web前端应用程序中使用）或从高性能多线程Open XML应用程序中使用IsolatedStorage时，会发生这种情况。
目前您需要从GitHub repo构建SDK，因为还没有正式版本。