在onfileactivated方法读取文件时获取未经授权的异常

当用户通过将文件类型与我的应用程序相关联来选择文件时，我试图复制PDF文件。在onfileactivated方法读取文件时获取未经授权的异常

不幸的是我获得未经授权的异常，当尝试复制文件

async protected override void OnFileActivated(FileActivatedEventArgs e) 
    {//IReadOnlyList<IStorageItem> 


     Frame rootFrame = Window.Current.Content as Frame; 

     // Do not repeat app initialization when the Window already has content, 
     // just ensure that the window is active 
     if (rootFrame == null) 
     { 

      // Create a Frame to act as the navigation context and navigate to the first page 
      rootFrame = new Frame(); 

      rootFrame.NavigationFailed += OnNavigationFailed; 

      if (e.PreviousExecutionState == ApplicationExecutionState.Terminated) 
      { 
       //TODO: Load state from previously suspended application 
      } 

      // Place the frame in the current Window 
      Window.Current.Content = rootFrame; 
     } 

     if (rootFrame.Content == null) 
     { 
      if (!rootFrame.Navigate(typeof(MainPage))) 
      { 
       throw new Exception("Failed to create initial page"); 
      } 
     } 

     StorageFolder magazinefolder = await ApplicationData.Current.LocalFolder.CreateFolderAsync("pdffolder", CreationCollisionOption.OpenIfExists); 
     IAsyncAction asyncAction = Windows.System.Threading.ThreadPool.RunAsync(
(workItem) => 
{ 




    foreach (IStorageItem tm in e.Files) 
    { 

     File.Copy(tm.Path, magazinefolder.Path); 

    } 


    // this.loadlibrary(); 






}); 

     var p = rootFrame.Content as MainPage; 
     // p.AddFileCall(e.Files); 

     // Ensure the current window is active 
     Window.Current.Activate(); 

    }

来源

2015-12-07 suvish valsan

假设你'tm'是一个StorageFile，你有没有试过'tm.CopyAsync（magazinefolder）;'？ – Romasz

是的，但同样的错误 –

而当你不重定向工作到ThreadPool - 只需运行'await（e.Files.FirstOrDefault（）as StorageFile）.CopyAsync（magazineFolder）;'你也会得到一个异常？如果您获得了有效的StorageFile，您是否曾试过并检查过？是否有可能分享一个示例项目？ – Romasz

而不是将文件作为IstorageItem我们可以直接把它作为StorageFile这将解决这个问题

async public void AddFileCall(Windows.ApplicationModel.Activation.FileActivatedEventArgs e) 
    { 
     StorageFolder magazinefolder = await ApplicationData.Current.LocalFolder.CreateFolderAsync(Constants.MagFolder, CreationCollisionOption.OpenIfExists); 
     foreach (StorageFile file in e.Files) 
     { 
      await file.CopyAsync(magazinefolder,file.Name,NameCollisionOption.GenerateUniqueName); 
     } 

     MessageDialog Sucess = new MessageDialog("File Imported", "Thank You"); 
     await Sucess.ShowAsync(); 
     this.loadlibrary(); 
    }

来源

2015-12-08 06:36:26

在onfileactivated方法读取文件时获取未经授权的异常

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