private void btnNext_Click(object sender, RoutedEventArgs e)
{
try
{
int q;
if (selectedProduct == null)
{
MessageBox.Show("No selection has been made");
cmbProducts.Focus();
return ;
}
if( String.IsNullOrWhiteSpace(txtQuantity.Text))
{
MessageBox.Show("Please specify the quantity");
txtQuantity.Focus();
return ;
}
if(!Int32.TryParse(txtQuantity.Text,out q ))
{
MessageBox.Show("Invalid Quantity");
txtQuantity.Focus();
return;
}
newSales.Id = selectedProduct.Id;
newSales.InvoiceNo = invoiceNo;
newSales.Name = selectedProduct.Name;
newSales.UnitPrice = selectedProduct.UnitPrice;
newSales.Quantity = Convert.ToInt32(txtQuantity.Text);
newSales.Total = newSales.UnitPrice * newSales.Quantity;
grandTotal += newSales.Total;
salesDetail.Add(newSales);
grdSale.ItemsSource = salesDetail;
newSales = new SalesDetail();
txtQuantity.Text = null;
cmbProducts.SelectedItem = null;
selectedProduct = null;
}
catch
{
}
}
private void cmbProducts_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
try
{
selectedProduct = (Products)cmbProducts.SelectedItem;
newSales = new SalesDetail();
txtQuantity.Focus();
}
catch
{
}
}