OpenXML读取文档

Question

所以我在我的资产文件夹中放了一个excel文件进行测试。我正在研究一个测试项目，看看代码是如何工作的。

如果我运行以下代码：

public async void TestAsync()
        {
            StorageFolder storageFolder = Windows.ApplicationModel.Package.Current.InstalledLocation;
            StorageFile sampleFile = await storageFolder.GetFileAsync(@"AssetsGenerator_Run_Data.xlsx");
        byte[] result;
        using (Stream stream = await sampleFile.OpenStreamForReadAsync())
        {
            using (var memoryStream = new MemoryStream())
            {

                stream.CopyTo(memoryStream);
                result = memoryStream.ToArray();
            }
        }
    }

我得到一个结果{byte [48347]}

但是在下面的代码中我得到一个错误：

public async static void CreateSpreadsheetWorkbook()
        {
            StorageFolder storageFolder = Windows.ApplicationModel.Package.Current.InstalledLocation;
            storageFolder = await storageFolder.GetFolderAsync(@"Assets");

        // Create a spreadsheet document by supplying the filepath.
        // By default, AutoSave = true, Editable = true, and Type = xlsx.
        SpreadsheetDocument spreadsheetDocument = SpreadsheetDocument.Create(storageFolder.Path, SpreadsheetDocumentType.Workbook);

        // Add a WorkbookPart to the document.
        WorkbookPart workbookpart = spreadsheetDocument.AddWorkbookPart();
        workbookpart.Workbook = new Workbook();

        // Add a WorksheetPart to the WorkbookPart.
        WorksheetPart worksheetPart = workbookpart.AddNewPart<WorksheetPart>();
        worksheetPart.Worksheet = new Worksheet(new SheetData());

        // Add Sheets to the Workbook.
        Sheets sheets = spreadsheetDocument.WorkbookPart.Workbook.AppendChild<Sheets>(new Sheets());

        // Append a new worksheet and associate it with the workbook.
        Sheet sheet = new Sheet() { Id = spreadsheetDocument.WorkbookPart.GetIdOfPart(worksheetPart), SheetId = 1, Name = "mySheet" };
        sheets.Append(sheet);

        workbookpart.Workbook.Save();

        // Close the document.
        spreadsheetDocument.Close();
    }

错误是：

System.UnauthorizedAccessException
  HResult=0x80070005
  Message=Access to the path 'C:Usersxxxxxsource
eposGeneratedCodeGeneratedCodeinx86DebugAppXAssets' is denied.
  Source=System.IO.FileSystem
  StackTrace:
   at System.IO.Win32FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, FileStream parent)
   at System.IO.Win32FileSystem.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, FileStream parent)
   at System.IO.MultiplexingWin32WinRTFileSystem.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, FileStream parent)
   at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options)
   at System.IO.Packaging.ZipPackage..ctor(String path, FileMode packageFileMode, FileAccess packageFileAccess, FileShare share)
   at System.IO.Packaging.Package.Open(String path, FileMode packageMode, FileAccess packageAccess, FileShare packageShare)
   at DocumentFormat.OpenXml.Packaging.OpenXmlPackage.CreateCore(String path)
   at DocumentFormat.OpenXml.Packaging.SpreadsheetDocument.Create(String path, SpreadsheetDocumentType type, Boolean autoSave)
   at DocumentFormat.OpenXml.Packaging.SpreadsheetDocument.Create(String path, SpreadsheetDocumentType type)
   at GeneratedCode.MainPage.<CreateSpreadsheetWorkbook>d__2.MoveNext() in C:Usersxxxxxsource
eposGeneratedCodeGeneratedCodeMainPage.xaml.cs:line 68

因此，文件夹可以在一种情况下访问，而不是在另一种情请帮我理解。

尝试了这段代码：

using (SpreadsheetDocument spreadSheet = SpreadsheetDocument.Open(sampleFileString, true))

并收到一个错误：

System.UnauthorizedAccessException
  HResult=0x80070005
  Message=Access to the path 'C:Usersxxxxxsource
eposGeneratedCodeGeneratedCodeinx86DebugAppXAssetsGenerator_Run_Data.xlsx' is denied.
  Source=System.IO.FileSystem
  StackTrace:
   at System.IO.Win32FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, FileStream parent)
   at System.IO.Win32FileSystem.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, FileStream parent)
   at System.IO.MultiplexingWin32WinRTFileSystem.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, FileStream parent)
   at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options)
   at System.IO.Packaging.ZipPackage..ctor(String path, FileMode packageFileMode, FileAccess packageFileAccess, FileShare share)
   at System.IO.Packaging.Package.Open(String path, FileMode packageMode, FileAccess packageAccess, FileShare packageShare)
   at DocumentFormat.OpenXml.Packaging.OpenXmlPackage.OpenCore(String path, Boolean readWriteMode)
   at DocumentFormat.OpenXml.Packaging.SpreadsheetDocument.Open(String path, Boolean isEditable, OpenSettings openSettings)
   at DocumentFormat.OpenXml.Packaging.SpreadsheetDocument.Open(String path, Boolean isEditable)
   at GeneratedCode.MainPage.Spreadsheet(String[] args) in C:Usersxxxxxsource
eposGeneratedCodeGeneratedCodeMainPage.xaml.cs:line 105
   at GeneratedCode.MainPage..ctor() in C:Usersxxxxxsource
eposGeneratedCodeGeneratedCodeMainPage.xaml.cs:line 42
   at GeneratedCode.GeneratedCode_XamlTypeInfo.XamlTypeInfoProvider.Activate_0_MainPage() in C:Usersxxxxxsource
eposGeneratedCodeGeneratedCodeobjx86DebugXamlTypeInfo.g.cs:line 178
   at GeneratedCode.GeneratedCode_XamlTypeInfo.XamlUserType.ActivateInstance() in C:Usersxxxxxsource
eposGeneratedCodeGeneratedCodeobjx86DebugXamlTypeInfo.g.cs:line 333