private void AddButton_Click(object sender, EventArgs e) { Sale _sale = new Sale(); if (String.IsNullOrEmpty(dateTimePicker1.Text)) { MessageBox.Show("Select dateTimePicker"); return; } try { customerCombo = customerComboBox.SelectedValue.ToString(); if (Convert.ToInt32(customerCombo) <= 0) { MessageBox.Show("Please,, Select any Customer.."); return; } } catch (Exception exception) { MessageBox.Show("Please,, Select any Customer.."); return; } try { categoryCombo = categoryComboBox.SelectedValue.ToString(); if (Convert.ToInt32(categoryCombo) <= 0) { MessageBox.Show("Please,, Select any Category.."); return; } } catch (Exception exception) { MessageBox.Show("Please,, Select any Category.."); return; } try { productCombo = productComboBox.SelectedValue.ToString(); if (Convert.ToInt32(productCombo) <= 0) { MessageBox.Show("Please,, Select any Product.."); return; } } catch (Exception exception) { MessageBox.Show("Please,, Select any Product.."); return; } if (quantityTextBox.Text == "") { MessageBox.Show("Quantity field is requirde.."); return; } if (mrpTextBox.Text == "") { MessageBox.Show("Mrp field is required"); return; } if (totalMrpTextBox.Text == "") { MessageBox.Show("totalMrp field is required"); return; } _salesBLL.AddButton(_sale); salesDataGridView.Visible = true; submitDataGridView.Visible = false; MessageBox.Show("Added successfully"); int row = 0; salesDataGridView.Rows.Add(); row = salesDataGridView.Rows.Count - 2; salesDataGridView["CustomerCode", row].Value = customerComboBox.Text; salesDataGridView["Date", row].Value = dateTimePicker1.Text; salesDataGridView["LoyalityPoint", row].Value = loyalityPointTextBox.Text; salesDataGridView["Category", row].Value = categoryComboBox.Text; salesDataGridView["Product", row].Value = productComboBox.Text; salesDataGridView["Available", row].Value = availableQuantityTextBox.Text; salesDataGridView["Qnty", row].Value = quantityTextBox.Text; salesDataGridView["mrp", row].Value = mrpTextBox.Text; salesDataGridView["TotalMrp", row].Value = totalMrpTextBox.Text; total = total + Convert.ToDouble(totalMrpTextBox.Text); grandTotalTextBox.Text = total.ToString(); double loyalityPoint = total / 1000; loyalityPointTextBox.Text = loyalityPoint.ToString(); double discount = loyalityPoint / 10; discountTextBox.Text = discount.ToString(); double discountAmount = total * discount / 100; discountAmountTextBox.Text = discountAmount.ToString(); double payableAmount = total - discountAmount; payableAmountTextBox.Text = payableAmount.ToString(); }