我现在正在编写我的第一个UWP应用程序,以便学习使用方法。我正在构建一个小型应用程序,从下载的Facebook存档中获取数据。
但是当我尝试打开文件时(即使每个人都拥有完全访问权限),我会收到UnauthorizedException错误。我不理解这一点,并且我没有找到任何人遇到过这个问题,他们只是在他们的硬盘驱动器上处理了任意旧文件(许多人在更具体的场景中遇到问题,但不仅仅是一个简单的文件)。
System.UnauthorizedAccessException was unhandled by user code
HResult=-2147024891
Message=Access to the path 'C:\Users\patri\Downloads\facebook-100004420950389\html\messages.htm' is denied.
Source=System.IO.FileSystem
StackTrace:
at System.IO.WinRTIOExtensions.<TranslateWinRTTaskCore>d__1`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.IO.WinRTFileSystem.<OpenAsync>d__1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.IO.WinRTFileSystem.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.Xml.XmlSystemPathResolver.GetEntity(Uri uri, String role, Type typeOfObjectToReturn)
at System.Xml.XmlTextReaderImpl.FinishInitUriString()
at System.Xml.XmlReaderSettings.CreateReader(String inputUri, XmlParserContext inputContext)
at System.Xml.Linq.XDocument.Load(String uri, LoadOptions options)
at Facebookalyzer.FacebookArchiveParser.PopulateArchiveFromHtml(String filePath, FacebookMessageArchive archive)
at Facebookalyzer.FacebookArchiveParser.<>c__DisplayClass0_0.<ExtractAllChatMessages>b__0()
at System.Threading.Tasks.Task.Execute()
InnerException:
有人知道我为什么会收到这个异常吗?还是说在UWP应用程序中不应该直接访问硬盘上的文件(这会让我产生疑问,为什么他们会提供文件打开对话框)