Hi Horst,
Thanks.
Yes, it has ALternativeKey in my customBO.
Where can I add these code? {var standardBO = <standard BO name>.Retrieve( this.<AlternativeKey>);}
Maybe it is wrong, but I feel:
Because I add a record to customBO, so I feel Retrieve() can't get any record, for example:
my customBO has fields: ID, description. And the standardBO has the same fields:ID, description.
I add a record (1,A) to customBO, <standard BO name>.Retrieve() can not get anything, because now the standardBO is empty.