private void btnReturn_Button_Click(object sender, RoutedEventArgs e)
{
// NOTE :- if productcode is blank then no preoduct is selected so cannot be returned
if (txtProductCode.Text == "")
{
// If value is not selected from data grid view then we cannot return it even when return button is clicked
MessageBox.Show("Please select the product to be returned first.");
return;
}
float updatedQty = float.Parse(txtSoldQty.Text) - float.Parse(txtReturnQty.Text);
// return quantity constraints
if (IsTextAllowed(txtReturnQty.Text) && (float.Parse(txtReturnQty.Text) > 0) && (updatedQty) >= 0)
{
// increase credit amount then update the quantity if partially returned and remove the row if completely returned
MessageBoxResult messageBoxResult = System.Windows.MessageBox.Show("Are you sure you want to return these items?", "Return Confirmation", System.Windows.MessageBoxButton.YesNo);
if (messageBoxResult == MessageBoxResult.Yes)
{
int billNo = Int32.Parse(txtSearch.Text);
//credit amount = unitcost * returnQty - discount % *(unitcost * returnQty) for that item
float discountOnReturnItem = discountPercent * (unitSellingPrice * float.Parse(txtReturnQty.Text));// ie discount % *(unitcost * returnQty) part
float creditAmount = unitSellingPrice * float.Parse(txtReturnQty.Text) - discountOnReturnItem;
//String.Format("{0:0.00}", 123.4567); // "123.46"
txtCreditAmount.Text = String.Format("{0:0.00}", creditAmount);
//TransactionScope: For transactions, eg all the steps in the transaction should be completed for the transaction to actually happen,
//so transaction scope makes sure that either all the steps are carried out or non of it are.
using (TransactionScope scope = new TransactionScope())
{
if (billData.Update(billNo, id, float.Parse(txtReturnQty.Text), creditAmount, discountOnReturnItem))
{
billData.histInsert(billNo, txtProductCode.Text, float.Parse(txtReturnQty.Text), creditAmount);
MessageBox.Show("Product Returned Successfully");
}
else
{
MessageBox.Show("Product Could Not Be Returned", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
}
scope.Complete();
}
}
}
else
{
MessageBox.Show("Invalid input on return quantity!");
}
}