public bool addconstraint(constraints addthis) { SqlConnection con = new SqlConnection(constring); SqlCommand newcommand = new SqlCommand("INSERT INTO dbo.Constraints (StartTime,EndTime,Day,CourseID,LecturerID,Lecture_type,ClassID,CourseName,LecturerName,Year,Semester) VALUES (@StartTime,@EndTime,@Day,@CourseID,@LecturerID,@Lecture_type,@ClassID,@CourseName,@LecturerName,@Year,@Semester)", con); newcommand.Parameters.Add("@StartTime", addthis.getStart()); newcommand.Parameters.Add("@EndTime", addthis.getEnd()); newcommand.Parameters.Add("@Day", addthis.getday()); newcommand.Parameters.Add("@CourseID", addthis.getcourseid()); newcommand.Parameters.Add("@LecturerID", addthis.getlecturerid()); newcommand.Parameters.Add("@Lecture_type", addthis.gettype()); newcommand.Parameters.Add("@ClassID", addthis.getclassroom()); newcommand.Parameters.Add("@CourseName", addthis.getcoursename()); newcommand.Parameters.Add("@LecturerName", addthis.getlecturer()); newcommand.Parameters.Add("@Year", addthis.getyear()); newcommand.Parameters.Add("@Semester", addthis.getsemester()); con.Open(); if (con.State == System.Data.ConnectionState.Open) { newcommand.ExecuteNonQuery(); con.Close(); return(true); } return(false); }