private void SaveButton_Click(object sender, EventArgs e) { if (StudyTextbox.Text != "" && YearTextbox.Text != "" && SemTextbox.Text != "") { Sems sem = new Sems(); sem.StudyField = StudyTextbox.Text; sem.Year = Convert.ToInt16(YearTextbox.Text); sem.Sem = Convert.ToInt16(SemTextbox.Text); DependencyFacade.InsertSem(sem); this.Hide(); } }