private void RemoveClicked(object sender, EventArgs e) { if (this.textBoxSemesterId.Text != "") { string s = this.textBoxSemesterId.Text; SemesterRepository sRepo = new SemesterRepository(); if (sRepo.Delete2(s) != 0) { MessageBox.Show("Semester Removed", "Successful"); this.dataGridViewSemesters.DataSource = sRepo.GetAllSemesters2(); this.textBoxSemesterId.Text = ""; } else { MessageBox.Show("Operation Failed / This Id Doesn't Exist", "Failed"); } } }