/// <summary>
/// Invoked when this page is about to be displayed in a Frame.
/// </summary>
/// <param name="e">Event data that describes how this page was reached. The Parameter
/// property is typically used to configure the page.</param>
protected async override void OnNavigatedTo(NavigationEventArgs e)
{
categoryName = e.Parameter as string;
Title.Text = Constants.UpperInitialChar(categoryName);
loadingProgressRing.IsActive = true;
/****** 这里是所有推荐课程的搜索 ***/
if (categoryName.Equals("Recommendation"))
{
TaskFactory<IEnumerable<COURSE_AVAIL>> tfRec = new TaskFactory<IEnumerable<COURSE_AVAIL>>();
IEnumerable<COURSE_AVAIL> recCourses = await tfRec.FromAsync(ctx.BeginExecute<COURSE_AVAIL>(
new Uri("/GetRecommendedCourses?customer_id=" + Constants.User.ID, UriKind.Relative), null, null),
iar => ctx.EndExecute<COURSE_AVAIL>(iar));
categoryCourses = new StoreData();
foreach (var c in recCourses)
{
categoryCourses.AddCourse(Constants.CourseRec2Course(c));
}
dataCategory = categoryCourses.GetSingleGroupByCategoryTitle(categoryName);
cvs1.Source = dataCategory;
loadingProgressRing.IsActive = false;
//courseDsq = (DataServiceQuery<COURSE_AVAIL>)(from course in ctx.COURSE_AVAIL
// where course.ID > 5
// select course);
//courseDsq.BeginExecute(OnRecommendationMannualCoursesComplete, null);
}
else
{
if (Constants.CategoryNameList.Contains(categoryName))
{
courseDsq = (DataServiceQuery<COURSE_AVAIL>)(from course_avail in ctx.COURSE_AVAIL
where course_avail.CATE_NAME == categoryName
select course_avail);
courseDsq.BeginExecute(OnCategoryCoursesComplete, null);
}
else
{
recDsq = (DataServiceQuery<COURSE_RECO_AVAIL>)(from re in ctx.COURSE_RECO_AVAIL
where re.RECO_TITLE == categoryName
select re);
recDsq.BeginExecute(OnRecommendationCoursesComplete, null);
}
}
UserProfileBt.DataContext = Constants.User;
}
/// <summary>
/// Invoked when this page is about to be displayed in a Frame.
/// </summary>
/// <param name="e">Event data that describes how this page was reached. The Parameter
/// property is typically used to configure the page.</param>
protected async override void OnNavigatedTo(NavigationEventArgs e)
{
categoryName = e.Parameter as string;
Title.Text = Constants.UpperInitialChar(categoryName);
loadingProgressRing.IsActive = true;
/****** 这里是所有推荐课程的搜索 ***/
if (categoryName.Equals("Recommendation"))
{
TaskFactory <IEnumerable <COURSE_AVAIL> > tfRec = new TaskFactory <IEnumerable <COURSE_AVAIL> >();
IEnumerable <COURSE_AVAIL> recCourses = await tfRec.FromAsync(ctx.BeginExecute <COURSE_AVAIL>(
new Uri("/GetRecommendedCourses?customer_id=" + Constants.User.ID, UriKind.Relative), null, null),
iar => ctx.EndExecute <COURSE_AVAIL>(iar));
categoryCourses = new StoreData();
foreach (var c in recCourses)
{
categoryCourses.AddCourse(Constants.CourseRec2Course(c));
}
dataCategory = categoryCourses.GetSingleGroupByCategoryTitle(categoryName);
cvs1.Source = dataCategory;
loadingProgressRing.IsActive = false;
//courseDsq = (DataServiceQuery<COURSE_AVAIL>)(from course in ctx.COURSE_AVAIL
// where course.ID > 5
// select course);
//courseDsq.BeginExecute(OnRecommendationMannualCoursesComplete, null);
}
else
{
if (Constants.CategoryNameList.Contains(categoryName))
{
courseDsq = (DataServiceQuery <COURSE_AVAIL>)(from course_avail in ctx.COURSE_AVAIL
where course_avail.CATE_NAME == categoryName
select course_avail);
courseDsq.BeginExecute(OnCategoryCoursesComplete, null);
}
else
{
recDsq = (DataServiceQuery <COURSE_RECO_AVAIL>)(from re in ctx.COURSE_RECO_AVAIL
where re.RECO_TITLE == categoryName
select re);
recDsq.BeginExecute(OnRecommendationCoursesComplete, null);
}
}
UserProfileBt.DataContext = Constants.User;
}
private async void OnRecommendationCoursesComplete(IAsyncResult result)
{
categoryCourses = new StoreData();
try
{
IEnumerable<COURSE_RECO_AVAIL> courses = recDsq.EndExecute(result);
foreach (var c in courses)
{
categoryCourses.AddCourse(Constants.CourseRecAvail2Course(c));
}
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
dataCategory = categoryCourses.GetSingleGroupByCategoryTitle(categoryName);
cvs1.Source = dataCategory;
loadingProgressRing.IsActive = false;
});
}
catch
{
ShowMessageDialog();
}
}
/// <summary>
/// DataServiceQuery callback method to refresh the UI.
/// </summary>
/// <param name="result">Async operation result.</param>
private async void OnCategoryCoursesComplete(IAsyncResult result)
{
categoryCourses = new StoreData();
try
{
IEnumerable <COURSE_AVAIL> courses = courseDsq.EndExecute(result);
foreach (var c in courses)
{
categoryCourses.AddCourse(Constants.CourseAvail2Course(c));
}
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
dataCategory = categoryCourses.GetSingleGroupByCategoryTitle(categoryName);
cvs1.Source = dataCategory;
loadingProgressRing.IsActive = false;
});
}
catch
{
ShowMessageDialog();
}
}