private void button1_Click(object sender, EventArgs e) { int appoint_num, own_num, pet_num, clinicNum; string own_fname, own_lname, pet_name, pet_type, appoint_time, tel_num; DateTime date; if (!txtAppointmentNum.Text.Equals("") || !txtOwn_FName.Text.Equals("") || !txtOwn_LName.Text.Equals("") || !txtOwn_num.Text.Equals("") || !txtPet_name.Text.Equals("") || !txtPet_number.Text.Equals("") || !txtPet_type.Text.Equals("") || !txtTel.Text.Equals("") || cmbClinicNumber.SelectedValue != null || comboBox1.SelectedIndex != -1) { appoint_num = Convert.ToInt32(txtAppointmentNum.Text); own_num = Convert.ToInt32(txtOwn_num.Text); tel_num = txtTel.Text; pet_num = Convert.ToInt32(txtPet_number.Text); clinicNum = Convert.ToInt32(cmbClinicNumber.SelectedValue.ToString()); own_fname = txtOwn_FName.Text; own_lname = txtOwn_LName.Text; pet_name = txtPet_name.Text; pet_type = txtPet_type.Text; appoint_time = comboBox1.SelectedItem.ToString();; date = dateTimePicker1.Value; //call method database.insert_appointment(appoint_num, own_num, own_lname, own_fname, tel_num, pet_num, pet_name, pet_type, date, appoint_time, clinicNum); this.Close(); } else { MessageBox.Show("Some Info is still needed"); } }