datetime - Have a date in vb.net surrounded by # signs what do they do? -


usually when comparing date hard coded use string, query brings #1/1/0001 12:00:00 am# if date hasn't been set in 400 database. tired comparing "1/1/0001 12:00:00 am" because though other error seems work find in comparison date time. # mean in instance.

if lastchg <> #1/1/0001 12:00:00 am#   ''do stuff  end if

lastchg declared date or datetime. date vb alias system.datetime. cannot compare date value string, can compare date constant date variable. #1/1/0001 12:00:00 am# so-called date literal , of type date. textual representation of date constant.

you write

const emptydate date = #1/1/0001 12:00:00 am#  if lastchg <> emptydate      ''do stuff end if

in case make sure if lastchg of type date compare date literal (with #), if string string literal (with ")


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