c＃ - UWP - 项目中包含的文件上的UnauthorizedAccessException

Question

我在Visual Studio 2015社区中编写UWP应用程序，并在运行构建时遇到以下异常，并且应用程序尝试使用 Project |打开我添加到项目中的文件。从VS添加新项。

System.UnauthorizedAccessException was unhandled by user code
  HResult=-2147024891
  Message=Access to the path 'C:\Users\garre\documents\visual studio 2015\Projects\ProjectManager\ProjectManager\bin\x86\Debug\AppX\projectdates.xml' is denied.
  Source=ProjectManager
  StackTrace:
       at ProjectManager.DataController.<CheckDates>d__5.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.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
       at ProjectManager.MainPage.<<projectsPivot_Click>b__21_0>d.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.Runtime.CompilerServices.TaskAwaiter.GetResult()
       at ProjectManager.MainPage.<projectsPivot_Click>d__21.MoveNext()
  InnerException: 

以及尝试访问该文件的代码段：

XmlReader xml = XmlReader.Create(
    File.Open("projectdates.xml", FileMode.Open, FileAccess.Read)
);

最后，这是我的解决方案树的屏幕截图：

我已经检查过该文件是否存在（复制设置为＆＃34;如果更新则复制＆＃34;在VS的属性视图中），并且权限是我的用户帐户可以访问它（读取/写/执行）。我甚至尝试用管理员权限打开VS并且没有优势。

修改： 以下是接收异常之前XML的属性：

编辑2： 好吧，我已尝试使用StorageFile方法访问该文件，现在我收到了这个新例外：

System.UnauthorizedAccessException was unhandled by user code
  HResult=-2147024891
  Message=Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))
  Source=mscorlib
  StackTrace:
       at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
       at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
       at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
       at ProjectManager.DataController.<GetData>d__6.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.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
       at ProjectManager.MainPage.<<projectsPivot_Load>b__21_0>d.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.Runtime.CompilerServices.TaskAwaiter.GetResult()
       at ProjectManager.MainPage.<projectsPivot_Load>d__21.MoveNext()
  InnerException: 

Answer 1

您看到的异常可能是由于Windows Universal Apps中的沙盒。但是，File.Open的文档没有提到它。

通常在Windows运行时应用中，您必须使用StorageFile而不是FileStream：

using System.IO;
using System.Threading.Tasks;
using System.Xml;
using Windows.Storage;
using Windows.ApplicationModel;

async public Task ReadXmlFile()
{
    // Use ONE of the following lines to get the file:
    var sf = await Package.Current.InstalledLocation.TryGetItemAsync("projectdates.xml") as StorageFile;
    var sf = await StorageFile.GetFileFromApplicationUriAsync(new Uri(@"ms-appx:///projectdates.xml"));

    var stream = await sf.OpenStreamForReadAsync();
    XmlReader xml = XmlReader.Create(stream);
    ...
}

Answer 2

将文件的构建操作更改为内容。

对于使用LINQ的XML：

var path =  Path.Combine(
            Windows.ApplicationModel.Package.Current.InstalledLocation.Path, 
            "projectdates.xml");
XDocument data = XDocument.Load(path);

Also relevant

Answer 3

听起来像一条畸形的路径......“c：...... \ documents”真的存在吗？如果没有，请尝试这样的路径：

string path = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + @"\visual studio 2015\Projects\ProjectManager\ProjectManager\bin\x86\Debug\AppX\projectdates.xml"