protected static ProductContainer _getProducts(String search, int pageNum)
{
List<Product> products = new List<Product>();
int pageCount = 0;
int totalResults = 0;
//prepare an ItemSearch request
ItemSearchRequest request = new ItemSearchRequest();
request.SearchIndex = "All";
request.Keywords = search;
request.ResponseGroup = new string[] { "ItemAttributes", "Small", "Images" };
request.ItemPage = pageNum.ToString();
ItemSearchResponse res = AmazonService.search(request);
if (res.Items[0].Item != null)
{
foreach (var item in res.Items[0].Item)
{
if (item == null) continue;
string url = item.DetailPageURL;
if (url.EndsWith("null"))
url = url.Remove(url.Length - 4);
int price = -1;
string formattedPrice = "";
if (item.ItemAttributes.ListPrice != null)
{
price = Convert.ToInt32(item.ItemAttributes.ListPrice.Amount);
formattedPrice = item.ItemAttributes.ListPrice.FormattedPrice;
}
Product product = new Product
{
Title = item.ItemAttributes.Title,
Link = url,
Image = item.MediumImage,
Price = price,
FormattedPrice = formattedPrice
};
products.Add(product);
}
}
if (products.Count > 0)
{
totalResults = Convert.ToInt32(res.Items[0].TotalResults);
if (totalResults > 0)
{
if (totalResults <= Globals.ITEMS_PER_PAGE)
pageCount = 1;
else
{
pageCount = totalResults / Globals.ITEMS_PER_PAGE;
if (totalResults % Globals.ITEMS_PER_PAGE != 0)
pageCount++;
}
}
}
return new ProductContainer
{
products = products,
pageCount = pageCount,
resultCount = totalResults
};
}
private void RetrieveProductsFromPages(int firstPage, int lastPage, int firstIndex )
{
errorOnSearch_ = false;
errorMessage_ = "";
// Batch requests in pairs of two. AMAZON Product Advertising API allows only two requests to be batched together [December 20th 2012]
int currentIndex = 0;
for (int pageNr = firstPage; pageNr <= lastPage; pageNr += 2 )
{
String itemPagesStr = (pageNr + 1 <= totalProducts_ / Globals.AMAZON_API_MAX_PRODUCTS_PER_PAGE) ? "&ItemSearch.1.ItemPage=" + pageNr + "&ItemSearch.2.ItemPage=" + (pageNr + 1) :
"&ItemPage=" + pageNr;
String requestString = searchRequestHeader_ +
"&ItemSearch.Shared.SearchIndex=" + searchIndex_ +
itemPagesStr +
"&ItemSearch.Shared.Keywords=" + searchKeywords_ +
"&ItemSearch.Shared.Availability=Available" +
"&ItemSearch.Shared.ResponseGroup=Small,Offers" +
"&ItemSearch.Shared.Condition=All";
String requestUrl = helper.Sign(requestString);
XmlDocument doc = new XmlDocument();
try
{
WebRequest request = HttpWebRequest.Create(requestUrl);
WebResponse response = request.GetResponse();
doc.Load(response.GetResponseStream());
}
catch ( Exception e )
{
errorOnSearch_ = true;
errorMessage_ = e.Message;
return;
}
// Check for error response
XmlNodeList errorMessages = doc.GetElementsByTagName("Message");
if (errorMessages != null && errorMessages.Count > 0)
{
errorOnSearch_ = true;
errorMessage_ = errorMessages.Item(0).InnerText;
return;
}
foreach( XmlNode node in doc.GetElementsByTagName("Item") ) {
if (currentIndex >= firstIndex)
{
if (foundProducts_.Count == Globals.PRODUCTS_PER_PAGE)
break;
var product = new Product();
product.Title = node["ItemAttributes"]["Title"].InnerText;
product.DetailPageLink = node["DetailPageURL"].InnerText;
try
{
product.LowestNewPrice = (int.Parse(node["OfferSummary"]["LowestNewPrice"]["Amount"].InnerText, null) / 100.0);
}
catch
{
product.LowestNewPrice = null;
}
try
{
product.LowestUsedPrice = (int.Parse(node["OfferSummary"]["LowestUsedPrice"]["Amount"].InnerText, null) / 100.0);
}
catch
{
product.LowestUsedPrice = null;
}
foundProducts_.Add(product);
}
currentIndex++;
}
}
}
