w*s
发帖数: 7227 | 1 Hi in database i have Table1,
it has 2 fields, prevDay, currDay.
sometime the fields are null in database, not filled yet.
in the code i want to check if null or not 1st,
if ((DateTime)Table1.prevDay != (DateTime?)null)
when i run it, it says Nullable objects must have a value.
what's the correct way ?
also what's the difference between DateTime and DateTime?
thanks ! | l*s
发帖数: 783 | 2 .HasValue
【在 w*s 的大作中提到】
: Hi in database i have Table1,
: it has 2 fields, prevDay, currDay.
: sometime the fields are null in database, not filled yet.
: in the code i want to check if null or not 1st,
: if ((DateTime)Table1.prevDay != (DateTime?)null)
: when i run it, it says Nullable objects must have a value.
: what's the correct way ?
: also what's the difference between DateTime and DateTime?
: thanks !
| w*s
发帖数: 7227 | 3 worked, thanks ! :)
【在 l*s 的大作中提到】
: .HasValue
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