public void Work(object sender, DoWorkEventArgs e)
{
_status = Status.Working;
if (Thread.CurrentThread.Name == null)
Thread.CurrentThread.Name = "Page " + _pageNumber.ToString() + " worker";
// Set the RunWorkEventArgs so we can check its status on completion
e.Result = this;
// Will hold the page's html broken up by each individual product
_productHtmlSegments = new List<string>();
// Gets the entire page's html
string pageHtml = _pageLoadMethod(_pageNumber,
_searchCriteria.SearchText);
// Get the number of results on this page
_pageResultCount = Parser.GetPageResultCount(pageHtml);
// If there are no results, set the status accordingly and exit
if (_pageResultCount == 0)
{
_status = Status.NoResults;
return;
}
else // There are results
{
// Break apart the page html by product
// so they can be parsed individually
_productHtmlSegments = Parser.GetPageResultItemHtml(pageHtml,
_pageResultCount);
}
List<Result<AmazonItem>> results = new List<Result<AmazonItem>>();
// Parse and validate each result, adding to the result list
foreach (string productHtml in _productHtmlSegments)
{
Result<AmazonItem> result =
ParseAndValidateProductHtml(productHtml);
// Don't worry about reporting the progress percentage here.
// The SearchManager will look at the total results returned
// and compare with the results requested and report that
// percentage to the UI (passing in a dummy zero here)
ReportProgress(0, result);
}
// The RunWorkerComplete method fires when method completes
// This is used as a signal to the SearchManager that we
// are clear to spawn another thread if necessary.
_status = Status.Finished;
}
