private static IEnumerable <ProductViewModel> GetProductsFromFile()
{
using (var service =
ProductsServiceFactory.CreateWithFileRepository(ConfigurationManager.AppSettings["FileStoragePath"]))
{
var productsFromFile = service.GetAllProducts();
return(productsFromFile.Select(p => new ProductViewModel
{
Id = p.Id,
Name = p.Name,
Price = p.Price,
Amount = p.Amount
}));
}
}
private void AddProduct(object sender, RoutedEventArgs e)
{
var button = ((Button)sender);
button.IsEnabled = false;
tblResult.Text = string.Empty;
bool isSuccess = false;
string errorMessage = string.Empty;
// First try to call WCF-service to add product to the DB.
// If it will fail, then at least we try to save product to the file.
try
{
_wcfClient.AddProduct(_product.ToDataContract());
isSuccess = true;
}
catch (Exception ex)
{
errorMessage += $"An error has occured while calling the WCF service: {ex.Message}{Environment.NewLine}";
}
try
{
// Save product to file.
using (var service =
ProductsServiceFactory.CreateWithFileRepository(ConfigurationManager.AppSettings["FileStoragePath"]))
{
service.SaveProduct(_product.ToDto());
}
isSuccess = true;
}
catch (Exception ex)
{
errorMessage += $"An error has occured while saving to file: {ex.Message}{Environment.NewLine}";
}
if (isSuccess)
{
var message = "Product successfully added.";
// If product was succesfully saved (either to DB or to file), but we get some error,
// then add errorMessag to output.
if (!string.IsNullOrEmpty(errorMessage))
{
message += $" BUT{Environment.NewLine}{errorMessage}";
}
tblResult.Text = message;
tblResult.Foreground = new SolidColorBrush(Colors.Green);
}
else
{
tblResult.Text = errorMessage;
tblResult.Foreground = new SolidColorBrush(Colors.Red);
}
// Clear form.
UpdateBinding();
button.IsEnabled = true;
}