public async Task OnStartCrawling(object param)
{
ClearCrawlerTree();
CrawlerInputParser inputParser = new CrawlerInputParser();
List <Uri> rootResources = inputParser.Parse(ViewModelsMediator.Instance.SourceFilePath);
if (rootResources != null)
{
StartBtnEnabled = false;
StopBtnEnabled = true;
// Init crawler
WebCrawler.WebCrawler crawler = new WebCrawler.WebCrawler();
crawler.MaxDepth = crawlingDepth;
crawler.Logger = LoggerViewModel.Instance;
crawler.LoadingFinished += OnPageLoadingFinished;
foreach (var rootUri in rootResources)
{
WebCrawlerOutput crawlerOutput = await crawler.PerformCrawlingAsync(rootUri, 0, -1);
}
StartBtnEnabled = true;
StopBtnEnabled = false;
}
}
private void OnPageLoadingFinished(int parentId, WebCrawlerOutput output)
{
LoggerViewModel.Instance.LogMessage(string.Format("Resource loaded: {0}", output.SourceUri));
var parentItem = FindTreeItemById(parentId);
string elementName = string.Format("ID {0}", output.SourceId);
AddCrawlerOutputTreeNode(parentItem, elementName, output);
}
public CrawlerTreeViewItem AddCrawlerOutputTreeNode(CrawlerTreeViewItem parent, string item, WebCrawlerOutput attachment)
{
// Construct element
CrawlerTreeViewItem element = new CrawlerTreeViewItem();
element.Header = item;
element.AttachedData = attachment;
// Attach to the parent
if (parent != null)
{
parent.Items.Add(element);
}
else
{
CrawlerOutput.Add(element);
}
treeNodesDict.Add(attachment.SourceId, element); // Register for quick access
RaisePropertyChanged(nameof(CrawlerOutput));
return(element);
}