Question

I am generating a data template in C#. With the help of the good people on this wonderful site, I’ve managed to take care of almost every issue. This should be the last problem. Because it’s a template I’m working on, I want every field in the table, including nulls. I was helped on how to update nulls by adding (object)this.field ?? DBNull.Value but I have a field that’s a foreign key and even though when I look in the database it says null, when I pull the records the value becomes 0. When I try to update this field it says that I am violating foreign key constraints. How can I work around this problem? I thought the null solution would work but it doesn’t show as null, it shows as 0.

Thanks

Answer 1

Is 0 a possible valid value for the column? If not, just typecast it to null when you encounter one. If it is valid you can still do that, by wrapping it in a conditional that checks the foreign row exists first.