javascript - uwp javascript 列出音乐库文件夹中的文件

Question

下面列出了应用程序中“Assets”文件夹中的文件并且功能正常。

// Get the path to the app's Assets folder.
var root = Windows.ApplicationModel.Package.current.installedLocation.path;
var path = root + "\\Assets";
//var path = Windows.Storage.KnownFolders.musicLibrary; 
var StorageFolder = Windows.Storage.StorageFolder;
var folderPromise = StorageFolder.getFolderFromPathAsync(path);
folderPromise.done(function getFolderSuccess(folder) {
    var filesInFolderPromise = folder.getFilesAsync();
    filesInFolderPromise.done(function getFilesSuccess(filesInFolder) {
        s = "";
        filesInFolder.forEach(function forEachFile(item) {
            s = s + item.name + "<br />";
        });
        document.getElementById('filelist').innerHTML = s;
    });
});

我想修改它以列出 musicLibrary 中的文件。当我将路径名称更改为

var path = Windows.Storage.KnownFolders.musicLibrary; 

我明白了

JavaScript runtime error: The parameter is incorrect

请帮助我使用适当的语法。 musicLibrary 功能在 list 中设置。

Answer 1

Windows.Storage.KnownFolders.musicLibrary

不是路径字符串。这是 StorageFolder 类。因此 getFolderFromPathAsync 的调用失败。请参阅 Microsoft 文档。

KnownFolders Class (You can select 'JavaScript' from the language combobox on the right pane)