private async void ExportXRBK(object DataContext)
{
if (TryGetBookItem(DataContext, out BookItem BkItem))
{
IStorageFile ISF = await AppStorage.SaveFileAsync("GR Book ( XRBK )", new string[] { ".xrbk" }, BkItem.Title);
if (ISF != null)
{
await ItemProcessor.WriteXRBK(BkItem, ISF);
}
}
}