public async void FetchYearsAsync()
{
App.Dispatcher.Invoke(() =>
{
IsYearsFetchEnabled = false;
});
var terms = await HttpClient.GetTermsAsync();
lock (Years)
{
App.Dispatcher.Invoke(() =>
{
var index = YearIndex;
HashSet <int> sets = new HashSet <int>();
sets.Add(-1);
foreach (var item in terms)
{
sets.Add(item.Year);
}
Years.ReplaceItems(sets.OrderBy(item => item));
if (index > 0 && index < Years.Count)
{
YearIndex = index;
}
else
{
YearIndex = 0;
}
});
}
App.Dispatcher.Invoke(() =>
{
IsYearsFetchEnabled = true;
});
}
