问题
当我尝试使用 EPPlus 保存超过 ~1.5 MiB 的文件时,会ExcelPackage.Save()
抛出System.IO.IsolatedStorage.IsolatedStorageException
.
说明
我正在创建一个 SSIS 包,Visual Studio 2008 9.0.30729.4462 QFE
并通过库.NET Framework 3.5 SP1
导出表的内容。SQL Server 2008 SP2 10.0.4311.0 64 bit
EPPlus 2.9.0.1
SSIS 包非常简单:Execute SQL Task
读取表的内容并将其放入变量中,然后Script task
读取记录集变量并通过 EPPlus 将内容保存到磁盘。
脚本任务的代码是:
namespace ST_00a0b40814db4c7290b71f20a45b62c6.csproj
{
using System;
using System.AddIn;
using System.Data;
using System.Data.OleDb;
using System.IO;
using Microsoft.SqlServer.Dts.Runtime;
using Microsoft.SqlServer.Dts.Tasks.ScriptTask;
using OfficeOpenXml;
[AddIn("ScriptMain", Version = "1.0", Publisher = "", Description = "")]
public partial class ScriptMain : VSTARTScriptObjectModelBase
{
public void Main()
{
DataTable documentList = new DataTable();
using (OleDbDataAdapter adapter = new OleDbDataAdapter())
{
adapter.Fill(documentList, this.Dts.Variables["DocumentList"].Value);
}
if (documentList.Rows.Count > 0)
{
FileInfo fileInfo = new FileInfo(@"C:\Temp\Test.xlsx");
if (fileInfo.Exists)
{
fileInfo.Delete();
}
using (ExcelPackage package = new ExcelPackage(fileInfo))
{
ExcelWorksheet worksheet = package.Workbook.Worksheets.Add("Documents");
for (Int32 i = 0; i < documentList.Rows.Count; i++)
{
for (Int32 j = 0; j < documentList.Columns.Count; j++)
{
worksheet.Cells[i + 1, j + 1].Value = documentList.Rows[i][j];
}
}
package.Save();
}
}
Dts.TaskResult = Convert.ToInt32(DTSExecResult.Success);
}
}
}
当我只提供脚本任务的几条记录时,程序包运行良好,但是当我对整个表运行它时package.Save();
,会出现System.IO.IsolatedStorage.IsolatedStorageException: Unable to determine the identity of domain
异常。
在这里您可以看到完整的堆栈跟踪:
Error: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.InvalidOperationException: Error saving file C:\Temp\Test.xls ---> System.IO.IsolatedStorage.IsolatedStorageException: Unable to determine the identity of domain.
at System.IO.IsolatedStorage.IsolatedStorage._GetAccountingInfo(Evidence evidence, Type evidenceType, IsolatedStorageScope fAssmDomApp, Object& oNormalized)
at System.IO.IsolatedStorage.IsolatedStorage.GetAccountingInfo(Evidence evidence, Type evidenceType, IsolatedStorageScope fAssmDomApp, String& typeName, String& instanceName)
at System.IO.IsolatedStorage.IsolatedStorage._InitStore(IsolatedStorageScope scope, Evidence domainEv, Type domainEvidenceType, Evidence assemEv, Type assemblyEvidenceType, Evidence appEv, Type appEvidenceType)
at System.IO.IsolatedStorage.IsolatedStorage.InitStore(IsolatedStorageScope scope, Type domainEvidenceType, Type assemblyEvidenceType)
at System.IO.IsolatedStorage.IsolatedStorageFile.GetStore(IsolatedStorageScope scope, Type domainEvidenceType, Type assemblyEvidenceType)
at System.IO.IsolatedStorage.IsolatedStorageFile.GetUserStoreForDomain()
at MS.Internal.IO.Packaging.PackagingUtilities.ReliableIsolatedStorageFileFolder.GetCurrentStore()
at MS.Internal.IO.Packaging.PackagingUtilities.ReliableIsolatedStorageFileFolder..ctor()
at MS.Internal.IO.Packaging.PackagingUtilities.GetDefaultIsolatedStorageFile()
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.SparseMemoryStream.Write(Byte[] buffer, Int32 offset, Int32 count)
at MS.Internal.IO.Packaging.CompressEmulationStream.Write(Byte[] buffer, Int32 offset, Int32 count)
at MS.Internal.IO.Packaging.CompressStream.Write(Byte[] buffer, Int32 offset, Int32 count)
at MS.Internal.IO.Zip.ProgressiveCrcCalculatingStream.Write(Byte[] buffer, Int32 offset, Int32 count)
at MS.Internal.IO.Zip.ZipIOModeEnforcingStream.Write(Byte[] buffer, Int32 offset, Int32 count)
at System.IO.StreamWriter.Flush(Boolean flushStream, Boolean flushEncoder)
at System.IO.StreamWriter.Write(String value)
at System.IO.TextWriter.Write(String format, Object arg0, Object arg1)
at OfficeOpenXml.ExcelWorksheet.UpdateRowCellData(StreamWriter sw)
at OfficeOpenXml.ExcelWorksheet.SaveXml()
at OfficeOpenXml.ExcelWorksheet.Save()
at OfficeOpenXml.ExcelWorkbook.Save()
at OfficeOpenXml.ExcelPackage.Save()
--- End of inner exception stack trace ---
at OfficeOpenXml.ExcelPackage.Save()
at ST_00a0b40814db4c7290b71f20a45b62c6.csproj.ScriptMain.Main() in C:\Temp\ScriptMain.cs:line 39
--- End of inner exception stack trace ---
at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
at System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.RuntimeType.InvokeMember(String name, BindingFlags bindingFlags, Binder binder, Object target, Object[] providedArgs, ParameterModifier[] modifiers, CultureInfo culture, String[] namedParams)
at System.Type.InvokeMember(String name, BindingFlags invokeAttr, Binder binder, Object target, Object[] args, CultureInfo culture)
at Microsoft.SqlServer.Dts.Tasks.ScriptTask.VSTATaskScriptingEngine.ExecuteScript()
我已经能够将问题确定为生成文件的大小:当 Excel 文件的大小增长约 1.5 MiB 时(这是一个或多或少的值,我无法找到确切的大小),错误出现。
我能在网上找到的唯一信息是一篇博文,博主提出了一个解决方案,他将代码“外包”到 DLL 并将其上传到服务器的 GAC,然后运行以下代码:
AppDomainSetup setup = new AppDomainSetup();
setup.ApplicationBase = rootPath;
setup.DisallowBindingRedirects = false;
setup.DisallowCodeDownload = true;
setup.ConfigurationFile = AppDomain.CurrentDomain.SetupInformation.ConfigurationFile;
Evidence evidence = new Evidence();
evidence.AddHost(new Zone(SecurityZone.MyComputer));
AppDomain ad = AppDomain.CreateDomain("NewAppDomain", evidence, setup);
YourClass yourClass = (YourClass)ad.CreateInstanceAndUnwrap(typeof(YourClass).Assembly.FullName, typeof(YourClass).FullName);
yourClass.aMethod();
AppDomain.Unload(ad);
但是,我无法尝试此解决方案,因为我无法访问服务器的 GAC,也无法上传 DLL。
有没有其他方法可以绕过这个问题?
我还打开了一份关于 EPPlus 问题跟踪器的错误报告。
摘要
- SSIS 包
- Visual Studio 2008 9.0.30729.4462 QFE
- .NET 框架 3.5 SP
- SQL Server 2008 SP2 10.0.4311.0 64 位
- EPPlus 2.9.0.1
- 大输出文件
- System.IO.IsolatedStorage.IsolatedStorageException:无法确定域的身份