/// <summary>Copies the contents of a stream to a file, asynchronously.</summary>
/// <param name="source">The source stream.</param>
/// <param name="destinationPath">The path to the destination file.</param>
/// <returns>A Task that represents the asynchronous operation.</returns>
public static Task CopyStreamToFileAsync(this Stream source, string destinationPath)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
if (destinationPath == null)
{
throw new ArgumentNullException("destinationPath");
}
// Open the output file for writing
var destinationStream = FileAsync.OpenWrite(destinationPath);
// Copy the source to the destination stream, then close the output file.
return(CopyStreamToStreamAsync(source, destinationStream).ContinueWith(t =>
{
var e = t.Exception;
destinationStream.Close();
if (e != null)
{
throw e;
}
}, TaskContinuationOptions.ExecuteSynchronously));
}
/// <summary>Copies the contents of a stream to a file, asynchronously.</summary>
/// <param name="source">The source stream.</param>
/// <param name="destinationPath">The path to the destination file.</param>
/// <returns>A Task that represents the asynchronous operation.</returns>
public static Task CopyStreamToFileAsync(this Stream source, string destinationPath)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
if (destinationPath == null)
{
throw new ArgumentNullException("destinationPath");
}
FileStream destinationStream = FileAsync.OpenWrite(destinationPath);
return(source.CopyStreamToStreamAsync(destinationStream).ContinueWith(delegate(Task t) {
AggregateException exception = t.Exception;
destinationStream.Close();
if (exception != null)
{
throw exception;
}
}, TaskContinuationOptions.ExecuteSynchronously));
}