private void button1_Click(object sender, EventArgs e) { if (textBox6.Text != "") { if (textBox4.Text != "") { if (textBox13.Text != "") { int storeStock = Convert.ToInt32(textBox11.Text); int quantity = Convert.ToInt32(textBox13.Text); if (storeStock - quantity >= 0) { string receiver = "miscellaneous"; store st = new store(); st.expiredStock(storeStock, quantity, textBox6.Text, textBox4.Text, username, receiver, textBox7.Text); loadMedicines(); textBox5.Text = ""; clearData(); } else { MessageBox.Show("WARNING!! You cannot transfer quantity more than that is available in Stock!!!"); } } else { MessageBox.Show("Please enter the amount of Stock to be transfered!!"); textBox13.Focus(); } } else { MessageBox.Show("Please enter request details of transfer."); textBox4.Focus(); } } else { MessageBox.Show("Please Select a Medicine!!"); } }