Casting null values

[Microsoft Newsserver]

Hi,

Im having a bit of difficulty working out how to do the following.


method ( paramType? param1, DateTime? requiredByDate , paramType? param3)


I have a row property which I need to pass to this method, this has a
property of IsNull which is a boolean, so I tried to do the following

method ( param1,
row.IsRequiredByDateNull() ? null, row.RequiredByDate,
param3 )

This fails on compile because it cant cast from a null to a DateTime.

How can i construct this ?

 

[Jon Skeet [C# MVP]]

Im having a bit of difficulty working out how to do the following.


method ( paramType? param1, DateTime? requiredByDate , paramType? param3)


I have a row property which I need to pass to this method, this has a
property of IsNull which is a boolean, so I tried to do the following

method ( param1,
row.IsRequiredByDateNull() ? null, row.RequiredByDate,
param3 )

This fails on compile because it cant cast from a null to a DateTime.

How can i construct this ?

Don't cast to DateTime - cast to DateTime? (with the question mark).
Then it should be fine.

 

[Microsoft Newsserver]

should have read

row.IsRequiredByDateNull() ? null : row.RequiredByDate;

 

[Micha³ Piaskowski]

should have read

row.IsRequiredByDateNull() ? null : row.RequiredByDate;

I once had the same problem.
I can't check it with a compiler right now, but the solution is
something like this:

row.IsRequiredByDateNull() ? (DateTime?)null : row.RequiredByDate;