/// <summary>
/// Populates the page with content passed during navigation. Any saved state is also
/// provided when recreating a page from a prior session.
/// </summary>
/// <param name="navigationParameter">The parameter value passed to
/// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested.
/// </param>
/// <param name="pageState">A dictionary of state preserved by this page during an earlier
/// session. This will be null the first time a page is visited.</param>
private async void navigationHelper_LoadState(object sender, LoadStateEventArgs e)
{
_queryText = e.NavigationParameter as String;
// Fetch the serach results from JobsDataSource
var searchResults = await JobDataSource.SearchJobsBySearchTextAsync(_queryText);
// Add the counts for various job status
int countOnSite = searchResults.Count(item => item.Status == "On Site");
int countNotStarted = searchResults.Count(item => item.Status == "Not Started");
int countCompleted = searchResults.Count(item => item.Status == "Completed");
// Add the filters based upon the job status
var filterList = new List <Filter>();
filterList.Add(new Filter("All", searchResults.Count, true));
if (countOnSite > 0)
{
filterList.Add(new Filter("On Site", countOnSite, false));
}
if (countNotStarted > 0)
{
filterList.Add(new Filter("Not Started", countNotStarted, false));
}
if (countCompleted > 0)
{
filterList.Add(new Filter("Completed", countCompleted, false));
}
// Communicate results through the view model
this.DefaultViewModel["QueryText"] = " " + '\u201c' + _queryText + '\u201d';
this.DefaultViewModel["Filters"] = filterList;
this.DefaultViewModel["ShowFilters"] = filterList.Count > 0;
this.DefaultViewModel["Results"] = searchResults;
}
/// <summary>
/// Invoked when a filter is selected using a RadioButton when not snapped.
/// </summary>
/// <param name="sender">The selected RadioButton instance.</param>
/// <param name="e">Event data describing how the RadioButton was selected.</param>
async void Filter_Checked(object sender, RoutedEventArgs e)
{
var filter = (sender as FrameworkElement).DataContext;
// Mirror the change into the CollectionViewSource.
// This is most likely not needed.
if (filtersViewSource.View != null)
{
filtersViewSource.View.MoveCurrentTo(filter);
}
// Determine what filter was selected
var selectedFilter = filter as Filter;
if (selectedFilter != null)
{
// Mirror the results into the corresponding Filter object to allow the
// RadioButton representation used when not snapped to reflect the change
selectedFilter.Active = true;
// Load the search results and filter them based on user-selected filter value
_searchResults = await JobDataSource.SearchJobsBySearchTextAsync(_queryText);
_searchResults = (selectedFilter.Name.Equals("All")) ? _searchResults :
new List <Job>(_searchResults.Where(job => job.Status.Equals(selectedFilter.Name)).ToList());
this.DefaultViewModel["Results"] = _searchResults;
// Ensure results are found
object results;
ICollection resultsCollection;
if (this.DefaultViewModel.TryGetValue("Results", out results) &&
(resultsCollection = results as ICollection) != null &&
resultsCollection.Count != 0)
{
VisualStateManager.GoToState(this, "ResultsFound", true);
return;
}
}
// Display informational text when there are no search results.
this.DefaultViewModel["ShowFilters"] = false;
VisualStateManager.GoToState(this, "NoResultsFound", true);
}
