public override void Validate()
{
base.Validate();
if (this.IsValid)
{
string sku = (string)this.Value;
// 1. Check to make sure the product sku is not empty
if (string.IsNullOrEmpty(sku))
{
this.IsValid = false;
this.ErrorMessage = Resources.ProductCanNotBeEmpty;
return;
}
else
{
// 2. Validate that the product sku is in the right format
RegexStringValidator regexStringValidator = new RegexStringValidator(ProductSkuRegEx);
try
{
regexStringValidator.Validate(sku);
}
catch (ArgumentException)
{
this.IsValid = false;
this.ErrorMessage = Resources.InvalidProductSkuFormat;
return;
}
// 3. Validate that the product sku exists in the product catalog system
IProductCatalogRepository productCatalogRepository =
SharePointServiceLocator.Current.GetInstance <IProductCatalogRepository>();
if (productCatalogRepository.GetProductBySku(sku) == null)
{
this.IsValid = false;
this.ErrorMessage = Resources.ProductNotFound;
return;
}
}
}
}
public void LoadProduct(string sku)
{
try
{
// Write a trace message, that might help in debugging a particular problem. Trace messages should be directed
// towards developers, and can contain deep technical information. In contrast, Eventlog messages are targeted to operations
// and should be more actionable.
logger.TraceToDeveloper(Resources.StartLoadingMessage);
// Get the product catalog from the ServiceLocator. Because this presenter only knows about the IProductCatalog
// interface, it can be tested in isolation. In the unit tests, you'll see a MockProductDatalogRepository being used.
// The actual implementation is provided by the Contoso.LOB.Services.Client project. In the it's WebAppFeatureReceiver
// You'll see how the actual ProductCatalogRepository is registered with the ServiceLocatorConfig.
IProductCatalogRepository productCatalogRepository =
SharePointServiceLocator.Current.GetInstance <IProductCatalogRepository>();
Product product = productCatalogRepository.GetProductBySku(sku);
if (product == null || product.Sku == null)
{
// Show an error message to the user.
new ViewExceptionHandler().ShowFunctionalErrorMessage(Resources.CouldNotFindProductInformation,
this.ErrorVisualizer);
}
else
{
this.view.Product = product;
this.view.DataBind();
}
logger.TraceToDeveloper(Resources.EndLoadProductMessage
);
}
catch (Exception ex)
{
// If something goes wrong, make sure the error gets logged
// and a non technical message is displayed to the user
new ViewExceptionHandler().HandleViewException(ex, this.ErrorVisualizer,
Contoso.PartnerPortal.ProductCatalog.Properties.Resources.ProductDetailsErrorMessage);
}
}