async Task storeAllTenders()
{
//denotes the tender page for use in this method
int i = 1;
while (isNextAvailable != false)
{
string httpTask = await Task.Run <string>(() => getPageData(nextUrl));
i = i + 1;
var httpResult = httpTask.ToString();
//Small data extraction to get "Next" and "Previous" page hyperlinks
var htmlDoc = new HtmlDocument();
htmlDoc.LoadHtml(httpResult);
//Extract tender data from the response
var tenderItems = await Task.Run <Object>(() => DataExtraction.getTenderPage(htmlDoc));
saveToTenderDb((List <tenderItem>)tenderItems, i);
}
List <tenderItem> dbtenders = await Task.Run <List <tenderItem> >(() => retrieveTenderFromDatabase(2));
if (dbtenders.Count > 0)
{
//nextPage.IsVisible = true;
}
//await WaitAndExecuteUpdateTenders(10800000, storeAllTenders);
}
async void onPreviousPageTapped(object sender, EventArgs eventArgs)
{
activityIndicator.IsVisible = true;
activityIndicator.IsRunning = true;
//Sending HTTP request to obtain the second tender page data
string httpTask = await Task.Run <string>(() => HttpRequestHandler.GetRequest(previousUrl, false));
var httpResult = httpTask.ToString();
//Small data extraction to get "Next" and "Previous" page hyperlinks
var htmlDoc = new HtmlDocument();
htmlDoc.LoadHtml(httpResult);
var aNodes = htmlDoc.DocumentNode.SelectNodes("//a");
isNextAvailable = false;
isPreviousAvailable = false;
foreach (var aNode in aNodes)
{
if (aNode.InnerHtml == "Previous")
{
previousUrl = "http://www2.sesco.com.my/etender/notice/" + aNode.Attributes["href"].Value;
isPreviousAvailable = true;
}
else if (aNode.InnerHtml == "Next")
{
nextUrl = "http://www2.sesco.com.my/etender/notice/" + aNode.Attributes["href"].Value;
isNextAvailable = true;
}
}
//Extract tender data from the response
var tenderItems = await Task.Run <Object>(() => DataExtraction.getTenderPage(htmlDoc));
//var tenders = DataExtraction.getWebData(httpResult, "tender");
//List<tenderItem> tenderItems = (List<tenderItem>)tenders;
listView.ItemsSource = (List <tenderItem>)tenderItems;
listView.ItemTemplate = dataTemplate;
if (isPreviousAvailable)
{
previousPage.IsVisible = true;
}
else
{
previousPage.IsVisible = false;
}
if (isNextAvailable)
{
nextPage.IsVisible = true;
}
else
{
nextPage.IsVisible = false;
}
activityIndicator.IsVisible = false;
activityIndicator.IsRunning = false;
}