Nullable object must have a value?

Question

On the line: bool travel = fill.travel.Value; I am getting the following error:

Nullable object must have a value

a

Answer 1

You can check if nullable variable has some value like this before your actually access its value

if(fill.travel.HasValue)
{
   bool travel = fill.travel.Value;
}

Answer 2

I had this happen because there was code like this:

bool? someVariable = (bool)someNullableBool;

The someNullableBool was null and this error was thrown.

The solution was to re-write it as:

bool? someVariable = (bool?)someNullableBool;