/// <summary>
/// Returns the number of books read; clears out the original books and saves.
/// </summary>
/// <returns></returns>
public static async Task <int> ReadDirAsync(BookDataContext bookdb)
{
var picker = new FolderPicker()
{
SuggestedStartLocation = PickerLocationId.DocumentsLibrary,
};
picker.FileTypeFilter.Add(".rdf");
var folder = await picker.PickSingleFolderAsync();
if (folder == null)
{
return(-1);
}
NextIndexLogged = LogNIndex;
NRead = 0;
CommonQueries.BookRemoveAll(bookdb);
await ReadDirAsyncFolder(bookdb, folder);
CommonQueries.BookSaveChanges(bookdb);
var totlog = logsb.ToString();
return(NRead);
}
