'System.DateTime' and 'System.DBNull'

[paulnamroud]

Hello,

I'm trying to send a Null value in a DateTime field while calling my stored procedure.

If I use this first method (short with one line), i got the following error message:

cmd.Parameters["@p_order_date"].Value = (this.OrderDate == DateTime.MaxValue) ? DBNull.Value : this.OrderDate;
 

Error Message:
Type of conditional expression cannot be determined because there is no implicit conversion between 'System.DateTime' and 'System.DBNull'


However, it works correctly if I use the 2nd method:

if (this.OrderDate == DateTime.MaxValue)
{
cmd.Parameters["@p_order_date"].Value = DBNull.Value;
}
else
{
cmd.Parameters["@p_order_date"].Value = this.OrderDate;
}
 

Can you help me to fix the problem with the first method ?

Thank you

Paul