StorageFolder.DeleteAsync Méthode

public:
 virtual IAsyncAction ^ DeleteAsync() = DeleteAsync;

/// [Windows.Foundation.Metadata.Overload("DeleteAsyncOverloadDefaultOptions")]
/// [Windows.Foundation.Metadata.RemoteAsync]
IAsyncAction DeleteAsync();

[Windows.Foundation.Metadata.Overload("DeleteAsyncOverloadDefaultOptions")]
[Windows.Foundation.Metadata.RemoteAsync]
public IAsyncAction DeleteAsync();

function deleteAsync()

Public Function DeleteAsync () As IAsyncAction

Retours

Aucun objet ou valeur n’est retourné par cette méthode lorsqu’elle se termine.

Implémente

Attributs

OverloadAttribute RemoteAsyncAttribute

Exceptions

Exemples

L’exemple suivant montre comment supprimer le dossier actif en appelant la méthode surchargée DeleteAsync(StorageDeleteOption). Cet exemple spécifie explicitement une valeur pour l’option qui supprime définitivement le fichier.

using Windows.Storage;
using System.Threading.Tasks;
using System.Diagnostics; // For writing results to Output window.

// Get the app's local folder.
StorageFolder localFolder = Windows.Storage.ApplicationData.Current.LocalFolder;

// Create a temporary folder in the current folder.
string folderName = "Test";
StorageFolder testFolder = await localFolder.CreateFolderAsync(folderName);

// Has the folder been created?
if(await localFolder.TryGetItemAsync(folderName) != null)
    Debug.WriteLine("Folder " + folderName + " exists.");
else
    Debug.WriteLine("Folder " + folderName + " does not exist.");

// Delete the folder permanently.
await testFolder.DeleteAsync(StorageDeleteOption.PermanentDelete);

// Has the folder been deleted?
if(await localFolder.TryGetItemAsync(folderName) != null)
    Debug.WriteLine("Folder " + folderName + " exists.");
else
    Debug.WriteLine("Folder " + folderName + " does not exist.");

IAsyncAction MainPage::ExampleCoroutineAsync()
{
    Windows::Storage::StorageFolder localFolder{ Windows::Storage::ApplicationData::Current().LocalFolder() };

    std::wstring folderName{ L"test" };

    Windows::Storage::StorageFolder newFolder{ co_await localFolder.CreateFolderAsync(folderName) };

    {
        // Check that the folder exists.
        Windows::Storage::IStorageItem newItem{ co_await localFolder.TryGetItemAsync(folderName) };
        std::wstringstream stringstream;
        stringstream << L"Folder: " << folderName.c_str();
        if (newItem)
        {
            stringstream << L" created" << std::endl;
        }
        else
        {
            stringstream << L" not found" << std::endl;
        }
        ::OutputDebugString(stringstream.str().c_str());
    }

    co_await newFolder.DeleteAsync(Windows::Storage::StorageDeleteOption::PermanentDelete);

    {
        // Check that the folder has been deleted.
        Windows::Storage::IStorageItem newItem{ co_await localFolder.TryGetItemAsync(folderName) };
        std::wstringstream stringstream;
        stringstream << L"Folder: " << folderName.c_str();
        if (newItem)
        {
            stringstream << L" not deleted" << std::endl;
        }
        else
        {
            stringstream << L" deleted" << std::endl;
        }
        ::OutputDebugString(stringstream.str().c_str());
    }
}

StorageFolder^ localFolder = ApplicationData::Current->LocalFolder;

String^ folderName = "test";

create_task(localFolder->CreateFolderAsync(folderName)).then([=](StorageFolder^ newFolder) -> task<IStorageItem^> {
    //Check the folder exists
    return create_task(localFolder->TryGetItemAsync(folderName));
}).then([=](IStorageItem^ newFolder) -> task<void> {
    String^ output = "";
    if (newFolder == nullptr)
    {
        output = "Folder: " + folderName + " not found\n";
    }
    else
    {
        output = "Folder: " + folderName + " created\n";
    }
    OutputDebugString(output->Begin());
    return create_task(newFolder->DeleteAsync(StorageDeleteOption::PermanentDelete));
}).then([=]() -> task<IStorageItem^> {
    return create_task(localFolder->TryGetItemAsync(folderName));
}).then([=](IStorageItem^ newFolder) {
    String^ output = "";
    if (newFolder == nullptr)
    {
        output = "Folder: " + folderName + " deleted\n";
    }
    else
    {
        output = "Folder: " + folderName + " not deleted\n";
    }
    OutputDebugString(output->Begin());
});

Remarques

Cette méthode utilise implicitement StorageDeleteOption.Default pour déterminer si l’élément est supprimé définitivement.

Voir aussi

• DeleteAsync(StorageDeleteOption)

public:
 virtual IAsyncAction ^ DeleteAsync(StorageDeleteOption option) = DeleteAsync;

/// [Windows.Foundation.Metadata.Overload("DeleteAsync")]
/// [Windows.Foundation.Metadata.RemoteAsync]
IAsyncAction DeleteAsync(StorageDeleteOption const& option);

[Windows.Foundation.Metadata.Overload("DeleteAsync")]
[Windows.Foundation.Metadata.RemoteAsync]
public IAsyncAction DeleteAsync(StorageDeleteOption option);

function deleteAsync(option)

Public Function DeleteAsync (option As StorageDeleteOption) As IAsyncAction

Paramètres

Retours

Aucun objet ou valeur n’est retourné par cette méthode lorsqu’elle se termine.

Implémente

Attributs

OverloadAttribute RemoteAsyncAttribute

Exceptions

Voir aussi

• DeleteAsync()