private void button1_Click(object sender, EventArgs e) { int no_of_rows = controllerObj.AddSupply(Int16.Parse(textBox3.Text), textBox1.Text, Int16.Parse(textBox2.Text), listBox1.GetItemText(listBox1.SelectedItem)); if (no_of_rows == 0) { MessageBox.Show("Insertion Failed"); } else { MessageBox.Show("Insertion succeeded"); } }