public async Task <List <BookInfo> > BookInfoListRetrieve(string sTitle)
{
EnsureServiceConnection();
USR_BookInfoList usrdl = await m_api.GetBookScanInfosFromTitle(sTitle);
if (usrdl.Result == false || usrdl.TheValue == null)
{
return(null);
}
List <BookInfo> bkiList = new List <BookInfo>(usrdl.TheValue);
if (bkiList.Count == 0)
{
return(null);
}
return(bkiList);
}