无法在 UWP 应用程序中访问我的系统驱动器文件夹。 当我使用 Directory.Exists 时总是返回 false

Question

string tallyDirPath = @"D:\Work";

if (Directory.Exists(tallyDirPath)) {

            var watcher = new FileSystemWatcher(tallyDirPath);

            watcher.NotifyFilter = NotifyFilters.Attributes
                                 | NotifyFilters.CreationTime
                                 | NotifyFilters.DirectoryName
                                 | NotifyFilters.FileName
                                 | NotifyFilters.LastAccess
                                 | NotifyFilters.LastWrite
                                 | NotifyFilters.Security
                                 | NotifyFilters.Size;

}

Answer 1

As Anders said, UWP apps are running in the sandbox. So UWP apps are not allowed to access some system resources directly like the file system. For example, you can't use the .net APIs that use the file path to get the file. Of course, there are some places that UWP apps could access by default. For more information, please check File access permissions

If you want to get a file via a path in UWP apps. You have to add the restricted broadFileSystemAccess capability in the manifest file. This capability works for APIs in the Windows.Storage namespace . This means you need to use the Windows.Storage APIs with the file path like StorageFile.GetFileFromPathAsync(String) Method .