public static List <string> GetProductsUri(string pagination_uri)
{
//go over the product page and extract product url's
List <string> productsLinks = new List <string>();
HtmlDocument dataPage = DataGetter.GetHtmlpage(new Uri(pagination_uri));
//now get all product url's from page
List <string> elements = new List <string>();
elements.Add("//li[@class='productNumberValue']");
List <KeyValuePair <string, HtmlNodeCollection> > data = DataGetter.GetDataByXPATH(dataPage, elements);
HtmlNodeCollection productsNodes = data[0].Value;
for (int j = 0; /*j < numProductsToGet && */ j < productsNodes.Count; j++)
{
string link = productsNodes[j].InnerHtml;
string extractedLink = ExtractLinkFromHtml(productsNodes[j], "href=", "\">");
productsLinks.Add(SigmaAldrichConstants.SigmaAldrichMain + "/" + extractedLink);
}
System.Threading.Thread.Sleep((int)DataGetter.GetRandomNumber(5.0, 15.0) * 1000);
return(productsLinks);
}
public static Product GetProduct(string product_uri)
{
Product p = new Product();
List <string> elements = new List <string>();
List <string> headers = new List <string>();
headers.Add("Components");
headers.Add("Application");
headers.Add("Features and Benefits");
headers.Add("General description");
headers.Add("Packaging");
headers.Add("Reconstitution");
headers.Add("Other Notes");
headers.Add("Legal Information");
headers.Add("Caution");
headers.Add("Biochem/physiol Actions");
headers.Add("Preparation Note");
elements.Add("//div[@class='descriptionContent']");
HtmlDocument dataPage = DataGetter.GetHtmlpage(new Uri(product_uri));
List <KeyValuePair <string, HtmlNodeCollection> > dataDescription = DataGetter.GetDataByXPATH(dataPage, elements);
p.Description = SigmaAldrichParser.ParseDescription(dataDescription, headers);
p.Properties = SigmaAldrichParser.ParseDetailProperties(dataPage.DocumentNode);
List <string> elements1 = new List <string>();
elements1.Add("//p[@class='product-name']");
p.Name = GetProductName(dataPage, elements1);
return(p);
}
//string ProductName = GetProductName(uri, elements);
public static void Parse(Uri uri)
{
HtmlDocument entirePage = DataGetter.GetHtmlpage(uri);
//string productName = GetProductName(entirePage, "//h2[@class='product-name']");
//string description = GetDescription(entirePage, "//meta[@name='description']");
//specifications Specifications = GetSpecifications(entirePage, "//td[@class='data']");
List <string> productUris = GetProductUris(entirePage, "//li");
}
private static string GetProductName(HtmlDocument page, string element)
{
List <string> elements = new List <string>();
elements.Add(element);
List <KeyValuePair <string, HtmlNodeCollection> > productName = DataGetter.GetDataByXPATH(page, elements);
HtmlNode productNameNode = productName[0].Value[0];
return(productNameNode.InnerText);
}
private static string GetProductName(HtmlDocument webpage, List <string> element_names)
{
string name = "";
List <KeyValuePair <string, HtmlNodeCollection> > dataName = DataGetter.GetDataByXPATH(webpage, element_names);
if (dataName.Count > 0)
{
name = dataName[0].Value.First(x => x.Name == "p").InnerText.Replace("\t", "").Replace("\n", "").Trim();
}
return(name);
}
public static List <string> GetAllProductsUri(List <string> pagination_uri, int num_pages_to_get)
{
//go over all product pages and extract product url's
List <string> productsLinks = new List <string>();
//int numProductsToGet = num_pages_to_get;
//if (numProductsToGet == 0)
//{
// numProductsToGet = pagination_uri.Count;
//}
for (int i = 0; i < pagination_uri.Count; i++)
{
HtmlDocument dataPage = DataGetter.GetHtmlpage(new Uri(pagination_uri[i]));
//now get all product url's from page
List <string> elements = new List <string>();
elements.Add("//li[@class='productNumberValue']");
List <KeyValuePair <string, HtmlNodeCollection> > data = DataGetter.GetDataByXPATH(dataPage, elements);
HtmlNodeCollection productsNodes = data[0].Value;
for (int j = 0; /*j < numProductsToGet && */ j < productsNodes.Count; j++)
{
string link = productsNodes[j].InnerHtml;
string extractedLink = ExtractLinkFromHtml(productsNodes[j], "href=", "\">");
productsLinks.Add(SigmaAldrichConstants.SigmaAldrichMain + "/" + extractedLink);
}
//foreach (HtmlNode node in productsNodes)
//{
// string link = node.InnerHtml;
// string extractedLink = ExtractLinkFromHtml(node, "href=", "\">");
// productsLinks.Add(SigmaAldrichConstants.SigmaAldrichMain + "/" + extractedLink);
//}
//if (productsLinks.Count < numProductsToGet)
//{
System.Threading.Thread.Sleep((int)DataGetter.GetRandomNumber(5.0, 15.0) * 1000);
//}
//else
//{
// break;
//}
}
return(productsLinks);
}
private static string GetDescription(HtmlDocument page, string element)
{
List <string> elements = new List <string>();
elements.Add(element);
List <KeyValuePair <string, HtmlNodeCollection> > description = DataGetter.GetDataByXPATH(page, elements);
HtmlNode descriptionNode = description[0].Value[0];
string descriptionStr = descriptionNode.OuterHtml;
descriptionStr = descriptionStr.Replace("\n", "");
string[] list_description = descriptionStr.Split('=');
descriptionStr = list_description[2];
descriptionStr = descriptionStr.Replace(">", "");
return(descriptionStr.Trim());
}
private static specifications GetSpecifications(HtmlDocument page, string element)
{
specifications specifications = new specifications();
List <string> elements = new List <string>();
elements.Add(element);
List <KeyValuePair <string, HtmlNodeCollection> > htmlSpecifications = DataGetter.GetDataByXPATH(page, elements);
HtmlNode Form = htmlSpecifications[0].Value[0];
HtmlNode Storage_Conditions = htmlSpecifications[0].Value[1];
HtmlNode Quality_Control = htmlSpecifications[0].Value[2];
specifications.form = Form.InnerText;;
specifications.storage_conditions = Storage_Conditions.InnerText;
specifications.quality_control = Quality_Control.InnerText;
return(specifications);
}
public static List <Description> GetAllProductsForCategory(string category, int num_products_to_get, int pages_to_get)
{
string categoryUri = GetCategoryUri(category);
int numProductsToGet = 0;
List <string> paginationUri = GetCategoryPaginationUrls(categoryUri, pages_to_get);
List <string> productsUris = GetAllProductsUri(paginationUri, num_products_to_get);
List <Description> products = new List <Description>();
List <string> elements = new List <string>();
List <string> headers = new List <string>();
headers.Add("Components");
headers.Add("Application");
headers.Add("Features and Benefits");
headers.Add("General description");
headers.Add("Packaging");
headers.Add("Reconstitution");
headers.Add("Other Notes");
headers.Add("Legal Information");
headers.Add("Caution");
headers.Add("Biochem/physiol Actions");
headers.Add("Preparation Note");
elements.Add("//div[@class='descriptionContent']");
if (num_products_to_get == 0)
{
//get all products
numProductsToGet = productsUris.Count;
}
for (int i = 0; i < num_products_to_get; i++)
{
List <KeyValuePair <string, HtmlNodeCollection> > dataDescription = DataGetter.GetDataByXPATH(new Uri(productsUris[i]), elements);
Description description = SigmaAldrichParser.ParseDescription(dataDescription, headers);
products.Add(description);
System.Threading.Thread.Sleep((int)DataGetter.GetRandomNumber(5.0, 15.0) * 1000);
}
return(products);
}
public static List <string> GetCategoryPaginationUrls(string category_url, int pages_to_get)
{
int numPagesToGet = pages_to_get;
HtmlDocument doc = DataGetter.GetHtmlpage(new Uri(category_url));
//infer page name from 2nd page link
List <string> liElements = new List <string>();
liElements.Add("searchResultsPagination");
List <KeyValuePair <string, HtmlNode> > paginationElements = DataGetter.GetDataByID(doc, "div", liElements);
List <string> liElements1 = new List <string>();
liElements1.Add("pg2");
List <KeyValuePair <string, HtmlNode> > page2 = DataGetter.GetDataByID(doc, "li", liElements1);
string page2Link = ExtractLinkFromHtml(page2[0].Value, "href", "'>");
HtmlNodeCollection divNodeChildren = paginationElements[paginationElements.Count - 1].Value.ChildNodes;
HtmlNode divNodeChildren1 = divNodeChildren.First(x => x.Name == "ul");
HtmlNode lastPage = divNodeChildren1.ChildNodes[divNodeChildren1.ChildNodes.Count - 2];
string lastPageLink = ExtractLinkFromHtml(lastPage, "href", "'>");
int lastPageNumber = ExtractNumberFromString(lastPageLink, "page=");
//Now build the pagination links...
string[] pageParts = page2Link.Split(new string[] { "page=" }, StringSplitOptions.None);
//pageParts[0] = pageParts[0].Substring(1);
pageParts[1] = RemoveNumberFromStartOfString(pageParts[1]);
//pageParts[1] = pageParts[1].Substring(0, pageParts[1].Length - 1);
List <string> paginationLinks = new List <string>();
if (numPagesToGet == 0)
{
//get all products
numPagesToGet = lastPageNumber;
}
for (int i = 0; i < numPagesToGet; i++)
{
paginationLinks.Add(SigmaAldrichConstants.SigmaAldrichMain + pageParts[0] + "page=" + (i + 1) + pageParts[1]);
}
return(paginationLinks);
}
private static List <string> GetProductUris(HtmlDocument page, string element)
{
List <string> elements = new List <string>();
elements.Add(element);
List <KeyValuePair <string, HtmlNodeCollection> > htmlProductUris = DataGetter.GetDataByXPATH(page, elements);
KeyValuePair <string, HtmlNodeCollection> ProductUrisNode = htmlProductUris[0];
HtmlNodeCollection HtmlCategoryUris = ProductUrisNode.Value;
List <string> ProductCategoryUris = new List <string>();
foreach (HtmlNode HtmlCategoryUri in HtmlCategoryUris)
{
string curr_InnerHtml = HtmlCategoryUri.InnerHtml;
curr_InnerHtml = curr_InnerHtml.Trim();
if (HtmlCategoryUri.InnerHtml.Contains("<a href="))
{
ProductCategoryUris.Add(HtmlCategoryUri.InnerHtml);
}
}
return(ProductCategoryUris);
}