vb.net - WinRT - 读取文件的访问被拒绝

Question

我正在尝试编写一些代码来写入文本文件。我的代码正在运行...但是今天(没有更改)它开始生成“访问被拒绝”错误。我正在写入 LocalFolder (Windows.Storage.ApplicationData.Current.LocalFolder)。

我是否必须在 list 中声明我要将文件保存在 LocalStorage 中？我知道我必须为我的文档执行此操作，还是我遗漏了某些内容？这是我的示例方法，说明了我如何尝试写入文件:

        ''' <summary>
    ''' Writes all of the text to the specified file in one of the specified safe storage folders.
    ''' </summary>
    ''' <param name="text">The text to write.</param>
    ''' <param name="append">Whether or not to append the data or overwrite what is in the file.</param>
    ''' <param name="fileName">The name of the file to write the data to.</param>
    ''' <param name="safeFolder">The safe storage folder that should be written to.  These folders are isolated for the application to use
    ''' and do not require additional manifest permissions.</param>
    ''' <returns></returns>
    ''' <remarks></remarks>
    Public Shared Async Function WriteAllText(text As String, append As Boolean, fileName As String, safeFolder As SafeStorageFolder) As Task
        Dim folder As Windows.Storage.StorageFolder

        Select Case safeFolder
            Case SafeStorageFolder.Local
                folder = Windows.Storage.ApplicationData.Current.LocalFolder
            Case SafeStorageFolder.Roaming
                folder = Windows.Storage.ApplicationData.Current.RoamingFolder
            Case SafeStorageFolder.Temp
                folder = Windows.Storage.ApplicationData.Current.TemporaryFolder
            Case Else
                folder = Windows.Storage.ApplicationData.Current.LocalFolder
        End Select

        Dim sf As StorageFile

        If append = True Then
            sf = Await folder.CreateFileAsync(fileName, Windows.Storage.CreationCollisionOption.OpenIfExists)
        Else
            sf = Await folder.CreateFileAsync(fileName, Windows.Storage.CreationCollisionOption.ReplaceExisting)
        End If

        ' WriteTextAsync will always overwrite the file even if the existing file has been opened.  We'll use
        ' AppendTextAsync here, the above CreateFileAsync will handle whether the file has been truncated or not.
        Await FileIO.AppendTextAsync(sf, text)

    End Function

Answer 1

我在测试项目中使用了相同的代码逻辑，它对我来说工作得很好。我没有遍历所有追加/不追加路径，但我能够写入每个文件夹。

您是否从您在选择中设置的文件夹对象中提取了文件路径，并仔细检查是否可以在文件资源管理器中打开它？