StorageFile.CopyAsync Metodo

public:
 virtual IAsyncOperation<StorageFile ^> ^ CopyAsync(IStorageFolder ^ destinationFolder) = CopyAsync;

/// [Windows.Foundation.Metadata.Overload("CopyOverloadDefaultNameAndOptions")]
/// [Windows.Foundation.Metadata.RemoteAsync]
IAsyncOperation<StorageFile> CopyAsync(IStorageFolder const& destinationFolder);

[Windows.Foundation.Metadata.Overload("CopyOverloadDefaultNameAndOptions")]
[Windows.Foundation.Metadata.RemoteAsync]
public IAsyncOperation<StorageFile> CopyAsync(IStorageFolder destinationFolder);

function copyAsync(destinationFolder)

Public Function CopyAsync (destinationFolder As IStorageFolder) As IAsyncOperation(Of StorageFile)

Parametri

Restituisce

Al termine di questo metodo, restituisce un oggetto StorageFile che rappresenta la copia del file creato in destinationFolder.

Implementazioni

Attributi

OverloadAttribute RemoteAsyncAttribute

Eccezioni

Esempio

L'esempio seguente copia un file nella cartella specificata e rinomina la copia chiamando il metodo CopyAsync(IStorageFolder, String, NameCollisionOption). In questo esempio viene specificato in modo esplicito un valore per l'opzione che sostituisce il file nella cartella di destinazione se esiste già un file con il nome specificato.

using Windows.Storage;
using System.Threading.Tasks;

// Get the app's temporary folder.
StorageFolder tempFolder = ApplicationData.Current.TemporaryFolder;

// Create a sample file in the temporary folder.
string newFileName = "test.txt";
StorageFile newFile = await tempFolder.CreateFileAsync(newFileName);

// Get the app's local folder to use as the destination folder.
StorageFolder localFolder = ApplicationData.Current.LocalFolder;

// Specify a new name for the copied file.
string renamedFileName = "renamed_test.txt";

// Copy the file to the destination folder and rename it.
// Replace the existing file if the file already exists.
StorageFile copiedFile = await newFile.CopyAsync(localFolder, renamedFileName, NameCollisionOption.ReplaceExisting);

IAsyncAction MainPage::CopyFileAsync()
{
    // Get the app's temporary folder.
    StorageFolder sourceFolder{ ApplicationData::Current().TemporaryFolder() };
    StorageFolder targetFolder{ ApplicationData::Current().LocalFolder() };

    // Choose source file name and new name for the copied file.
    std::wstring newFileName{ L"test.txt" };
    std::wstring copyFileName{ L"renamed_test.txt" };

    // Create a sample file in the temporary folder.
    StorageFile sourceFile{ co_await sourceFolder.CreateFileAsync(newFileName, Windows::Storage::CreationCollisionOption::ReplaceExisting) };
    // Overwrite any existing file with the same name.
    StorageFile copiedFile{ co_await sourceFile.CopyAsync(targetFolder, copyFileName, Windows::Storage::NameCollisionOption::ReplaceExisting) };
    // Do something with copied file.
}

//Get the app's temporary folder
StorageFolder^ sourceFolder = ApplicationData::Current->TemporaryFolder;
StorageFolder^ targetFolder = ApplicationData::Current->LocalFolder;

// Choose source file name and new name for the copied file
String^ newFileName = "test.txt";
String^ copyFileName = "renamed_test.txt";

//Create a sample file in the temporary folder
auto copyFileTask = create_task(sourceFolder->CreateFileAsync(newFileName, Windows::Storage::CreationCollisionOption::ReplaceExisting)).then
([targetFolder, copyFileName](StorageFile^ sourceFile) -> task<StorageFile^>
{
    //Overwrite any existing file with the same name 
    auto copyFileTask = sourceFile->CopyAsync(targetFolder, copyFileName, Windows::Storage::NameCollisionOption::ReplaceExisting);
    return create_task(copyFileTask);
}).then([](StorageFile^ copiedFile) {
    //do something with copied file
});

Commenti

Questo metodo usa il valore FailIfExists dell'enumerazione CreationCollisionOption per impostazione predefinita. Questo metodo genera quindi un'eccezione se nella cartella di destinazione esiste già un file con lo stesso nome. Se si vuole gestire un conflitto di nomi file in modo diverso, chiamare il metodo di overload CopyAsync(IStorageFolder, String, NameCollisionOption).

Vedi anche

• CopyAsync(IStorageFolder, String)
• CopyAsync(IStorageFolder, String, NameCollisionOption)

public:
 virtual IAsyncOperation<StorageFile ^> ^ CopyAsync(IStorageFolder ^ destinationFolder, Platform::String ^ desiredNewName) = CopyAsync;

/// [Windows.Foundation.Metadata.Overload("CopyOverloadDefaultOptions")]
/// [Windows.Foundation.Metadata.RemoteAsync]
IAsyncOperation<StorageFile> CopyAsync(IStorageFolder const& destinationFolder, winrt::hstring const& desiredNewName);

[Windows.Foundation.Metadata.Overload("CopyOverloadDefaultOptions")]
[Windows.Foundation.Metadata.RemoteAsync]
public IAsyncOperation<StorageFile> CopyAsync(IStorageFolder destinationFolder, string desiredNewName);

function copyAsync(destinationFolder, desiredNewName)

Public Function CopyAsync (destinationFolder As IStorageFolder, desiredNewName As String) As IAsyncOperation(Of StorageFile)

Parametri

Restituisce

Al termine di questo metodo, restituisce un oggetto StorageFile che rappresenta la copia del file creato in destinationFolder.

Implementazioni

Attributi

OverloadAttribute RemoteAsyncAttribute

Eccezioni

Vedi anche

• CopyAsync(IStorageFolder)
• CopyAsync(IStorageFolder, String, NameCollisionOption)

public:
 virtual IAsyncOperation<StorageFile ^> ^ CopyAsync(IStorageFolder ^ destinationFolder, Platform::String ^ desiredNewName, NameCollisionOption option) = CopyAsync;

/// [Windows.Foundation.Metadata.Overload("CopyOverload")]
/// [Windows.Foundation.Metadata.RemoteAsync]
IAsyncOperation<StorageFile> CopyAsync(IStorageFolder const& destinationFolder, winrt::hstring const& desiredNewName, NameCollisionOption const& option);

[Windows.Foundation.Metadata.Overload("CopyOverload")]
[Windows.Foundation.Metadata.RemoteAsync]
public IAsyncOperation<StorageFile> CopyAsync(IStorageFolder destinationFolder, string desiredNewName, NameCollisionOption option);

function copyAsync(destinationFolder, desiredNewName, option)

Public Function CopyAsync (destinationFolder As IStorageFolder, desiredNewName As String, option As NameCollisionOption) As IAsyncOperation(Of StorageFile)

Parametri

Restituisce

Al termine di questo metodo, restituisce un oggetto StorageFile che rappresenta la copia del file creato in destinationFolder.

Implementazioni

Attributi

OverloadAttribute RemoteAsyncAttribute

Eccezioni

Vedi anche

• CopyAsync(IStorageFolder)
• CopyAsync(IStorageFolder, String)