ERROR: Method name expected

Question

 Hi, i get this error ,Method name expected, when I write this code, please help

 

public string MonthP(string student_id, int y, string mth)

{

string sql = "Select sitS from Sit where student_id='" + id + "' and years='" + (y).ToString() + "'";

using (SqlConnection cn = new SqlConnection(con.stringConex()))

{

try

{

cn.Open();

using (SqlCommand cm = new SqlCommand(sql, cn))

{

using (SqlDataReader rd = cm.ExecuteReader())

{

if (rd.Read())

{

return rd["sitS "](Convert.ToInt32(mth) - 1); // Error on this line

}

else

{

return "-1";

}

}

}

}

catch (Exception ex)

{

return "-1";

}

}

}

 

Thanks!