cmd.Parameters.AddWithValue nullable int

Question

In my data layer class, I initialize a parameter like so:

private int? _DependencyID;

public int? DependencyID
{ get {return _DependencyID;} set {_DependencyID          


        

Answer 1

You need to add an object:

cmd.AddWithValue("@DependencyID", _DependencyID == null? DBNull.Value : (object)_DependencyID); 

You can shorten that to

cmd.AddWithValue("@DependencyID", (object)_DependencyID ?? DBNull.Value);