Question

我正在开发一个应用程序，您应该可以打开并保存文件，类似于“记事本”。它是一个通用应用程序，应该适用于计算机和移动设备。

该应用程序在计算机上正常运行。如果我在本地或在Dropbox上保存或打开文件，它也可以在移动设备上正常工作。

但是如果我在OneDrive上打开一个文件（通过文件选择器），然后尝试保存一个异常被抛出：访问被拒绝。（HRESULT异常：0x80070005（E_ACCESSDENIED））

如果我在OneDrive上选择“另存为”则可以。但每次我选择Save后，都会创建一个新的文件实例（我得到“文件1”，“文件2”，“文件3”等等。）

我只在手机上测试了这个。我的应用程序可能有一个错误，但由于它适用于DropBox，我不这么认为。这是OneDrive的已知问题吗？或者我可能只是有一些本地问题？我使用的是Windows 10 Mobile 10.10586.420和OneDrive 17.11。

以下是一些用于说明问题的代码：

<Page
     x:Class="BasicEditor.MainPage"
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:local="using:BasicEditor"
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
     mc:Ignorable="d">

 <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}" Margin="40">
   <Grid.RowDefinitions>
    <RowDefinition Height="auto" />
    <RowDefinition Height="*" />
   </Grid.RowDefinitions>
   <StackPanel Orientation="Horizontal">
    <Button Content="Open"
      Click="OpenButton_Click" />
    <Button Content="Save"
      Click="SaveButton_Click" />
    <Button Content="Save as"
      Click="SaveAsButton_Click" />
   </StackPanel>

  <TextBox Grid.Row="1" x:Name="TextEditor"
      TextWrapping="Wrap" />
  </Grid>
 </Page>





using System;
 using System.Collections.Generic;
 using Windows.Storage;
 using Windows.Storage.AccessCache;
 using Windows.Storage.Pickers;
 using Windows.UI.Popups;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;



// The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x409

namespace BasicEditor
 {



 /// <summary>
  /// An empty page that can be used on its own or navigated to within a Frame.
  /// </summary>
  public sealed partial class MainPage : Page
     {
         public MainPage()
         {
             this.InitializeComponent();
         }

  string MruToken;

  private async void OpenButton_Click(object sender, RoutedEventArgs e)
   {
    FileOpenPicker openPicker = new FileOpenPicker();
    openPicker.ViewMode = PickerViewMode.List;
    openPicker.SuggestedStartLocation = PickerLocationId.DocumentsLibrary;
    openPicker.FileTypeFilter.Add(".txt");
    StorageFile file = await openPicker.PickSingleFileAsync();
    if (file != null)
    {
     try
     {
      string fileContent = await FileIO.ReadTextAsync(file);
      TextEditor.Text = fileContent;

      string token = Windows.Storage.AccessCache.StorageApplicationPermissions.MostRecentlyUsedList.Add(file, "");
      MruToken = token;
     }
     catch (Exception ex)
     {
      System.Diagnostics.Debug.Write($"Open-Error: {ex.Message}");

     var dialog = new MessageDialog($"Open-Error: {ex.Message}");
      await dialog.ShowAsync();
     }
    }
   }



  private async void SaveButton_Click(object sender, RoutedEventArgs e)
   {
    try
    {
     var file = await StorageApplicationPermissions.MostRecentlyUsedList.GetFileAsync(MruToken);

    string fileContent = await FileIO.ReadTextAsync(file);

    await FileIO.WriteTextAsync(file, TextEditor.Text);

    var dialog = new MessageDialog($"Saved successfully");
     await dialog.ShowAsync();
    }
    catch (Exception ex)
    {
     System.Diagnostics.Debug.Write($"Save-Error: {ex.Message}");

    var dialog = new MessageDialog($"Save-Error: {ex.Message}");
     await dialog.ShowAsync();
    }

  }



  private async void SaveAsButton_Click(object sender, RoutedEventArgs e)
   {
    FileSavePicker savePicker = new FileSavePicker();
    savePicker.SuggestedStartLocation = PickerLocationId.DocumentsLibrary;
    savePicker.FileTypeChoices.Add("Plain Text", new List<string>() { ".txt" });
    savePicker.SuggestedFileName = "New Document";
    StorageFile file = await savePicker.PickSaveFileAsync();
    if (file != null)
    {
     try
     {
      await FileIO.WriteTextAsync(file, TextEditor.Text);

     string token = Windows.Storage.AccessCache.StorageApplicationPermissions.MostRecentlyUsedList.Add(file, "");
      MruToken = token;
     }
     catch (Exception ex)
     {
      System.Diagnostics.Debug.Write($"SaveAs-Error: {ex.Message}");

     var dialog = new MessageDialog($"SaveAs-Error: {ex.Message}");
      await dialog.ShowAsync();
     }
    }
   }
  }
 }

我的应用的测试版可在此处找到：https://www.microsoft.com/store/apps/9NBLGGH3MFM3

使用OneDrive时具有完全行为的另一个应用是NotepadX。

在Windows 10 Mobile上将文件保存到OneDrive时出现问题

0 个答案: