private void btnAdd_Click(object sender, EventArgs e) { //getting values from the input fields v.Brand = TextBoxBrand.Text; v.Model = textBoxModel.Text; v.EngineNo = textBoxEngNo.Text; v.ChassiNo = textBoxChassiNo.Text; v.ProductionYear = Int32.Parse(textBoxProdYear.Text); v.Type = comboBoxType.Text; v.CustomerID = customerID; //check whether insertion is success bool success = v.insert(v); if (success == true) { MessageBox.Show("Successfully Inserted!"); //to clear data on fields clear(); } else { MessageBox.Show("Error Occured!"); } }