| -api-id | -api-type |
|---|---|
M:Windows.Storage.StorageFolder.CreateFolderQuery |
winrt method |
Gets a query result object that contains the subfolders in the current folder.
A query result object. Call the GetFoldersAsync method of the query result to get the subfolders in the current folder. This method returns a list of type IReadOnlyList<StorageFolder>. Each file or folder is represented by an item of type StorageFolder.
You don't have permission to access the contents of the current folder.
This query is a shallow query that returns only subfolders in the current folder. For a list of methods that identifies shallow queries and deep queries, see the Remarks in the GetFoldersAsync method.
To specify additional query options, call the CreateFolderQueryWithOptions method.
To get items that are files or folders, call the CreateItemQuery method.
The following example shows how to get the contents of the subfolders in the user's Pictures folder, grouped into folders by month, by calling the GetFoldersAsync(CommonFolderQuery) overloaded method. (Files from the root of the current folder are not included.)
Before you run the following example, enable the Pictures Library capability in the app manifest file.
using Windows.Storage;
using Windows.Storage.Search;
using System.Threading.Tasks;
using System.Diagnostics; // For writing results to the Output window.
// Get the user's Pictures folder.
// Enable the corresponding capability in the app manifest file.
StorageFolder picturesFolder = KnownFolders.PicturesLibrary;
// Get the files in the subfolders of the
// user's Pictures folder, grouped by month.
StorageFolderQueryResult groupedItems =
picturesFolder.CreateFolderQuery(CommonFolderQuery.GroupByMonth);
// Iterate over the results and print the list of folders
// and files to the Visual Studio Output window.
foreach (StorageFolder folder in await groupedItems.GetFoldersAsync())
{
Debug.WriteLine(folder.Name);
// To iterate over the files in each folder,
// uncomment the following lines.
// foreach(StorageFile file in await folder.GetFilesAsync())
// Debug.WriteLine(" " + file.Name);
}IAsyncAction MainPage::ExampleCoroutineAsync()
{
// Get the users's Pictures folder.
// Enable the Pictures Library capability in the app manifest file.
Windows::Storage::StorageFolder picturesFolder{ Windows::Storage::KnownFolders::PicturesLibrary() };
// Get the files in the user's Pictures folder, and group them by month.
Windows::Storage::Search::StorageFolderQueryResult results{ picturesFolder.CreateFolderQuery(Windows::Storage::Search::CommonFolderQuery::GroupByMonth) };
Windows::Foundation::Collections::IVectorView<Windows::Storage::StorageFolder> itemsInFolder{
co_await results.GetFoldersAsync() };
// Iterate over the results, and print the list of file groups to the Visual Studio output window.
for (StorageFolder const& itemInFolder : itemsInFolder)
{
std::wstring output{ itemInFolder.Name() };
::OutputDebugString(output.c_str());
}
}
// Get user's pictures folder
StorageFolder^ picturesFolder = KnownFolders::PicturesLibrary;
// Get the files in the user's Pictures folder and group them by month
StorageFolderQueryResult^ itemsInFolder = picturesFolder->CreateFolderQuery(CommonFolderQuery::GroupByMonth);
create_task(itemsInFolder->GetFoldersAsync()).then([=](IVectorView<StorageFolder^>^ itemsInFolder) {
//Iterate over the results and print the list of file groups
// to the visual studio output window
for (auto it = itemsInFolder->First(); it->HasCurrent; it->MoveNext())
{
StorageFolder^ file = it->Current;
String^ output = file->Name + "\n";
OutputDebugString(output->Begin());
}
});