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 ?

Microsoft Newsserver <(E-Mail Removed)> wrote:
> 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.

--
Jon Skeet - <(E-Mail Removed)>
Web site: http://www.pobox.com/~skeet
Blog: http://www.msmvps.com/jon_skeet
C# in Depth: http://csharpindepth.com

should have read

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





"Microsoft Newsserver" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> 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 ?
>

On Jun 23, 5:16 pm, "Microsoft Newsserver" <m...@nowhere.com> wrote:
> should have read
>
> row.IsRequiredByDateNull() ? null : row.RequiredByDate;
>
> "Microsoft Newsserver" <m...@nowhere.com> wrote in message
>
> news:(E-Mail Removed)...
>
> > 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 ?

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;