insert checkbox values in to database

Hi,

 

I'm trying to insert checkbox values in to a table, this is my code:- for (int i = 0; i < ckboxcourses.Items.Count; i++)
{
if (ckboxcourses.Items[i].Selected)
{
cmdcourse.Parameters.Add("@emp_id", SqlDbType.Int).Value = Employeeid;
cmdcourse.Parameters.Add("@course_id", SqlDbType.Int).Value = ckboxcourses.Items[i].Value;
Response.Write(Employeeid + " " + ckboxcourses.Items[i].Value + "&lt;BR>");
}
}


cmdcourse.Connection.Open();
cmdcourse.ExecuteReader();
 I get :-

The variable ...