protected override void OnNavigatedTo(NavigationEventArgs e)
{
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility =
AppViewBackButtonVisibility.Visible;
ViewModel = ((CourseItemViewModel)e.Parameter);
this.Loaded += Page_Loaded;
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility =
AppViewBackButtonVisibility.Visible;
ViewModel = ((CourseItemViewModel)e.Parameter);
setInfo();
getComments();
}
public void Undo()
{
if ((r_CoursesStackIndexes.Count > 0))
{
CourseItemViewModel item = Items[r_CoursesStackIndexes.Peek()];
CalAverage.SubstractMarkAndPoints(item.Mark, item.Points);
Items.RemoveAt(r_CoursesStackIndexes.Pop());
}
}
//查询老师或课程名
private async void search_QuerySubmitted(AutoSuggestBox sender, AutoSuggestBoxQuerySubmittedEventArgs args)
{
try {
HttpClient httpClient = new HttpClient();
var headers = httpClient.DefaultRequestHeaders;
string header = "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.87 Safari/537.36";
if (!headers.UserAgent.TryParseAdd(header))
{
throw new Exception("Invaild header value: " + header);
}
string courseURL = "http://www.courstack.com/search/sysu?word=" + args.QueryText;
HttpResponseMessage res = await httpClient.GetAsync(courseURL);
res.EnsureSuccessStatusCode();
string returnContent = await res.Content.ReadAsStringAsync();
HtmlDocument html = new HtmlDocument();
html.LoadHtml(returnContent);
var nodes = html.DocumentNode.SelectNodes("//a[@href]");
CourseItemViewModel searchViewModel = new CourseItemViewModel();
foreach (var item in nodes)
{
var href = item.Attributes["href"].Value.ToString();
if (href.Contains("/course/sysu"))
{
string id = href.Substring(13);
var result = ViewModel.FindCourseByID(id);
if (result != null)
{
searchViewModel.AddCourseItem(result);
}
}
}
httpClient.Dispose();
((App)App.Current).myframe.Navigate(typeof(SearchPage), searchViewModel);
} catch (Exception ex) {
Debug.WriteLine(ex.Message);
if (ex.Message.Equals("An error occurred while sending the request."))
{
await new MessageDialog("应用无法联网，请检查您的网络设置").ShowAsync();
}
}
}
public CoursesListView(int index)
{
InitializeComponent();
BindingContext = viewModel = new CourseItemViewModel(index);
}
