private void searchSession_Click(object sender, EventArgs e) { session searchsession = new session(); sessionModel sessionModel = new sessionModel(); sessionModel.SubName = subjectBox.Text; sessionModel.groupId = Int32.Parse(GroupBox.Text); sessionModel.lec = lecturerbox.Text; //System.Windows.Forms.MessageBox.Show(sessionModel.lec.ToString()); findSessionList.DataSource = searchsession.SearchSession(sessionModel); }