public void updateTeaching(string id, teaching tch)
{
teaching dbtch = database.teachings.First(data => data.idmain == id);
dbtch = tch;
database.SaveChanges();
}
public void deleteTeaching(string id)
{
teaching tch = database.teachings.First(data => data.idmain == id);
database.teachings.Remove(tch);
}
public teaching getTeaching(string id)
{
teaching tch = database.teachings.First(data => data.idmain == id);
return(tch);
}
public void insertTeaching(ref teaching tch)
{
database.teachings.Add(tch);
database.SaveChanges();
}