private void updatebutton1_Click_1(object sender, EventArgs e) { DAL.DAO.CourseO aCourseInfo = new DAL.DAO.CourseO(); aCourseInfo.Name = coursenametextBox.Text; aCourseInfo.Id = courseidtextBox.Text; aCourseInfo.Credit = 0; double.TryParse(CredittextBox.Text, out aCourseInfo.Credit); aCourseInfo.Semister = semistertextBox.Text; aCourseInfo.Teacher = teachertextBox.Text; aCourseInfo.CourseFee = coursefeetextBox.Text; CourseBL CourseBLOBJ = new CourseBL(); bool result = CourseBLOBJ.UpdateNewCourseandSendToDA(aCourseInfo); if (result) { MessageBox.Show("UPDATE IS COMPLETE"); this.PopulateDatagridview(); Updatebutton.Enabled = true; deletcoursebutton.Enabled = true; CANCELbutton1.Enabled = true; confirmbutton1.Enabled = true; coursenametextBox.Text = " "; courseidtextBox.Text = " "; CredittextBox.Text = " "; semistertextBox.Text = " "; teachertextBox.Text = " "; coursefeetextBox.Text = " "; } else { MessageBox.Show("RESULT: " + CourseBLOBJ.Message); } }