public async Task<Stream> OpenAsync(FileAccessOption accessOption, CancellationToken cancellationToken)
{
await AwaitExtensions.SwitchOffMainThreadAsync(cancellationToken);
switch (accessOption)
{
case FileAccessOption.ReadOnly:
{
// Make sure the source file exists
EnsureExists();
return File.OpenRead(Path);
}
case FileAccessOption.ReadWrite:
return File.Open(Path, FileMode.OpenOrCreate, FileAccess.ReadWrite);
default:
throw new ArgumentOutOfRangeException("accessOption", accessOption, null);
}
}
public async Task<Stream> OpenAsync(FileAccessOption accessOption, CancellationToken cancellationToken = new CancellationToken())
{
FileAccessMode fileAccessMode;
switch (accessOption)
{
case FileAccessOption.ReadOnly:
fileAccessMode = FileAccessMode.Read;
break;
case FileAccessOption.ReadWrite:
fileAccessMode = FileAccessMode.ReadWrite;
break;
default:
throw new ArgumentOutOfRangeException(nameof(accessOption), accessOption, null);
}
var wrtStream = await _storageFile.OpenAsync(fileAccessMode)
.AsTask(cancellationToken)
.ConfigureAwait(false);
return wrtStream.AsStream();
}
