Question

I have an object model that contains a boolean MyBool and I have a table that contains a field MyField. I’m writing a linq-to-sql query that should returning a list of objects with MyBool set to true or false depending on if MyField has a value.

This is what I have so far:

var TheListOfObjects = (from thetable in MyDC.TheTable
                        ....
                        select new MyObject()
                        {
                            MyBool = thetable.MyField.Contains("*")

                         }).ToList();

I the error: The null value cannot be assigned to a member with type System.Boolean which is a non-nullable value type. Doesn’t Contains return a bool?

What am I missing?
Thanks.

Answer 1

if you don’t want a nullable property in MyObject you can check for null when you are assigning

var TheListOfObjects = (from thetable in MyDC.TheTable
                        ....
                        select new MyObject()
                        {
                            MyBool = (thetable.MyField == null) ? false : thetable.MyField.Contains("*") //check if it's null in-line

                         }).ToList();