private void CheckoutButton_Click(object sender, RoutedEventArgs e)
{
if (Order.OrderItems.Count == 0)
{
MessageBox.Show("Add products to proceed!", "Empty order");
return;
}
try
{
var window = new OrderCheckoutDialog(Order);
window.ShowDialog();
if (window.DialogResult != true)
{
return;
}
Order = new Order();
RefreshOrderItemsDataGrid();
UpdateGrandTotalLabel();
ProductSource = _productHandler.GetItems();
ProductComboBox.GetBindingExpression(ProductComboBox.ItemsSourceProperty)?.UpdateTarget();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message + " : An error has occured!");
}
}
private void RefreshSearchComboBox()
{
// Update Data Grid with new set of products
ProductSource = ProductTypeComboBox.SelectedItem != null && ProductComboBox != null
? _productHandler.GetProducts(productType : (ProductType)ProductTypeComboBox.SelectedIndex)
: _productHandler.GetItems();
ProductComboBox?.GetBindingExpression(ProductComboBox.ItemsSourceProperty)?.UpdateTarget();
}
private void AddButton_Click(object sender, RoutedEventArgs e)
{
try
{
#region Exception Handling
if (QuantityTextBox.Text == "" || DiscountTextBox.Text == "" || UnitPriceTextBox.Text == "")
{
MessageBox.Show("Some inputs are empty");
// Log.Debug("Quantity TextBox or Discount TextBox is Empty");
return;
}
else if (int.Parse(QuantityTextBox.Text) <= 0)
{
// Log.Debug("Qauntity is less than or equal to zero");
MessageBox.Show("Quantity is not valid");
return;
}
/* ALLOWED DISCOUNT TO BE NEGATIVE */
//else if (decimal.Parse(DiscountTextBox.Text) < 0)
//{
// // Log.Debug("Discount is negative ");
// MessageBox.Show("Discount is negative");
// return;
//}
else if (decimal.Parse(DiscountTextBox.Text) >= 100)
{
// Log.Debug("Discount greater than 100");
MessageBox.Show("Discount is more than 100%");
return;
}
else if (decimal.Parse(UnitPriceTextBox.Text) < 0)
{
// Log.Debug("Discount greater than 100");
MessageBox.Show("Unit Price is negative");
return;
}
#endregion
var quantity = QuantityTextBox.Text == "" ? 0 : uint.Parse(QuantityTextBox.Text);
var product = ProductComboBox.SelectedItem as Product;
var item = product as Item;
_discount = DiscountTextBox.Text == "" ? 0 : decimal.Parse(DiscountTextBox.Text);
_unitPrice = UnitPriceTextBox.Text == "" ? 0 : decimal.Parse(UnitPriceTextBox.Text);
if (product != null)
{
#region validation
if (quantity > item?.StockQty)
{
MessageBox.Show("Not enough items in stock to fullfil your requirement", "Not Enough Stock");
// Log.Debug("Entered quantity is greater than available items");
return;
}
if (IsAlreadyEntered(product.Id))
{
// Log.Debug("Attempted to enter same item twice");
MessageBox.Show("This entry is already entered once. Try updating its quantity instead");
}
#endregion
else
{
var salePrice = _unitPrice != 0 ? _unitPrice : item?.UnitPrice * (100 - _discount) / 100 ?? 0;
var orderItem = new OrderItem(product.Id.GetValueOrDefault(), product.Name, quantity,
salePrice);
// add items to the order entries list
Order.AddOrderItem(orderItem);
UpdateGrandTotalLabel();
RefreshSearchComboBox();
RefreshOrderItemsDataGrid();
ProductTypeComboBox.Focus();
}
}
else
{
MessageBox.Show("Please select a Product!", "Product not selected");
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Invalid Input");
}
finally
{
QuantityTextBox.Text = "";
UnitPriceTextBox.Text = "";
DiscountTextBox.Text = "";
ProductComboBox.GetBindingExpression(ItemsControl.ItemsSourceProperty)?.UpdateTarget();
}
}