//update the degree in the database
private bool updateDegree(student std, degree new_degree)
{
long?id_new_deg;
if (new_degree.isEmpty())
{
id_new_deg = null;
}
else
{
id_new_deg = new_degree.id;
}
using (var db = new lppDB())
{
db.students.Where(st => st.id == std.id).Set(p => p.degree_id, id_new_deg).Update();
db.Close();
}
return(true);
}
/// <summary>
/// Check if the student specified has to be chown in the datagrid
/// </summary>
/// <param name="st">student to check</param>
/// <param name="f_name"></param>
/// <param name="f_surname"></param>
/// <param name="f_degree"></param>
/// <returns></returns>
private Boolean filterStudent(Student_item st, string f_name, string f_surname, degree f_degree)
{
if (f_name.Length != 0)
{
if (!st.St.name.Contains(f_name))
{
return(false);
}
}
if (f_surname.Length != 0)
{
if (!st.St.surname.Contains(f_surname))
{
return(false);
}
}
if (f_degree != null)
{
if (f_degree.isEmpty())
{
return(st.Deg == null);
}
if (st.Deg == null)
{
return(false);
}
if (!st.Deg.name.Equals(f_degree.name) || !st.Deg.code.Equals(f_degree.code))
{
return(false);
}
}
return(true);
}