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我正在尝试在 MVC 应用程序的控制器中使用 EPPLUS 创建一个 Excel 文件。

该文件似乎创建得很好，但是当我尝试保存时会窒息：

[HttpPost]
public FileResult getBill(int billMonth, int billYear)
{
    FileInfo newFile = new FileInfo("C:\\cool.xlsx");
    if (newFile.Exists)
    {
        newFile.Delete();  // ensures we create a new workbook
        newFile = new FileInfo("cool.xlsx");
    }
    using (ExcelPackage package = new ExcelPackage(newFile))
    {
        // add a new worksheet to the empty workbook
        ExcelWorksheet worksheet = package.Workbook.Worksheets.Add("Inventory");
        //Add the headers
        worksheet.Cells[1, 1].Value = "ID";    

        ...

        // save our new workbook and we are done!
        package.Save();
    }

我得到的错误：Error saving file C:\cool.xlsx

 System.InvalidOperationException was unhandled by user code
  HResult=-2146233079
  Message=Error saving file C:\cool.xlsx
  Source=EPPlus
  StackTrace:
       at OfficeOpenXml.ExcelPackage.Save()
       at ...BillingController.getBill(Int32 billMonth, Int32 billYear) in ...\Controllers\BillingController.cs:line 118
       at lambda_method(Closure , ControllerBase , Object[] )
       at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters)
       at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters)
       at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass37.<>c__DisplayClass39.<BeginInvokeActionMethodWithFilters>b__33()
       at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass4f.<InvokeActionMethodFilterAsynchronously>b__49()
  InnerException: System.UnauthorizedAccessException
       HResult=-2147024891
       Message=Access to the path 'C:\cool.xlsx' is denied.
       Source=mscorlib
       StackTrace:
            at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
            at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
            at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, String msgPath, Boolean bFromProxy)
            at System.IO.FileStream..ctor(String path, FileMode mode)
            at OfficeOpenXml.ExcelPackage.Save()
       InnerException:

最终，我什至不想保存它，我只想将它作为 FileResult 返回给用户，但认为这是设置它的必要步骤。

4

1 回答 1

2

这System.UnauthorizedAccessException是一个明确的指标，表明这是一个权限问题。您正在保存到您无权写入的目录。

尝试保存到某个子文件夹，而不是直接保存到 C: 驱动器。如果应用程序的 IIS 耗尽，请将该文件夹的权限授予您的应用程序池。

于 2013-07-24T14:29:46.000 回答