private void CancelOrderButton_Click(object sender, EventArgs e)
{
NewOrderButton.Enabled = true;
PrintOrderButton.Enabled = false;
PrintPreviewButton.Enabled = false;
CancelOrderButton.Enabled = false;
ItemGroupBox.Enabled = false;
ClientNameTextBox.Clear();
ItemNameComboBox.SelectedIndex = -1;
QuantityTextBox.Clear();
UnitPriceTextBox.Clear();
CurrentStockTextBox.Clear();
TotalAmountTextBox.Text = "0";
SalesTaxTextBox.Text = "0";
TotalToPayTextBox.Text = "0";
CartDataGridView.DataSource = null;
shoppingCart.Clear();
}
private void AddToCartButton_Click(object sender, EventArgs e)
{
if (IsValidated())
{
if (Convert.ToInt16(QuantityTextBox.Text.Trim()) > Convert.ToInt16(CurrentStockTextBox.Text))
{
MessageBox.Show("Quantity can't be greater than current stock!", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
bool hasSameProductSelectedAgain = false;
//If Product Is Reselected and Add it's value so update it's previous Value
foreach (DataGridViewRow row in CartDataGridView.Rows)
{
if (Convert.ToInt16(row.Cells["ItemId"].Value) == Convert.ToInt16(ItemNameComboBox.SelectedValue))
{
row.Cells["Quantity"].Value = Convert.ToInt16(row.Cells["Quantity"].Value) + Convert.ToInt16(QuantityTextBox.Text);
row.Cells["TotalPrice"].Value = Convert.ToInt16(row.Cells["Quantity"].Value) * Convert.ToDecimal(row.Cells["UnitPrice"].Value);
hasSameProductSelectedAgain = true;
}
}
if (hasSameProductSelectedAgain == false)
{
CartItem item = new CartItem()
{
ItemId = Convert.ToInt16(ItemNameComboBox.SelectedValue),
ItemName = ItemNameComboBox.Text,
Quantity = Convert.ToInt16(QuantityTextBox.Text.Trim()),
UnitPrice = Convert.ToDecimal(UnitPriceTextBox.Text.Trim()),
TotalPrice = Convert.ToInt16(QuantityTextBox.Text.Trim()) * Convert.ToDecimal(UnitPriceTextBox.Text.Trim())
};
// Array, Collection, List, DataTable and DataSet
shoppingCart.Add(item);
CartDataGridView.DataSource = null;
CartDataGridView.DataSource = shoppingCart;
}
decimal totalAmount = shoppingCart.Sum(x => x.TotalPrice);
TotalAmountTextBox.Text = totalAmount.ToString();
decimal totalSalesTax = (16 * totalAmount) / 100;
SalesTaxTextBox.Text = totalSalesTax.ToString();
decimal totalPay = totalAmount + totalSalesTax;
TotalToPayTextBox.Text = totalPay.ToString();
//update stock in MySQL
int productId = Convert.ToInt16(ItemNameComboBox.SelectedValue);
int quantity = Convert.ToInt16(QuantityTextBox.Text);
UpdateStockLevel(productId, quantity);
ItemNameComboBox.SelectedIndex = -1;
QuantityTextBox.Clear();
UnitPriceTextBox.Clear();
CurrentStockTextBox.Clear();
}
}
