The “X” property on “Y” could not be set to a 'null' value. You must set this property to a non-null value of type 'Int32'

Question

When I run my application and I click a specific button I get the error:

\"The \"X\" property on \"Y\" could not be set to a \'null\' value. You must set thi         


        

Answer 1

My problem was that my Model database was out of sync with the actual (dev) database. So the EDMX thought it was smallint but the actual column was int. I updated the model database to int and the EDMX to Int32 and now it works.