public PackageSelectorViewModel()
{
Packages = new ObservableCollection <PackageDefinitionViewModel>();
PackageSources = new ObservableCollection <Uri>();
InitializePackageSources();
PropertyChanged += (sender, args) =>
{
if (args.PropertyName == "SearchTerm")
{
var searchTerm = SearchTerm.ToLowerInvariant();
if (searchTerm.Length < 3)
{
return;
}
SearchesInProgress++;
Task.Factory.StartNew(() =>
{
var repository = PackageRepositoryFactory.Default.CreateRepository(PackageSource.ToString());
return(repository.Search(searchTerm, true)
.Where(p => p.Id.ToLower().StartsWith(searchTerm))
.OrderBy(p => p.Id)
.ThenByDescending(p => p.Version)
.ToList()
.Select(p =>
{
var id = p.Id;
var version = p.Version.ToString();
return new PackageDefinitionViewModel(id, version);
})
.ToList());
}).ContinueWith(r =>
{
if (r.IsFaulted)
{
var exception = r.Exception.InnerExceptions.FirstOrDefault();
if (exception != null)
{
Status = exception.Message;
}
else
{
Status = "An unknown error occured accessing the Package Source.";
}
}
if (!r.IsFaulted && r.IsCompleted && searchTerm == SearchTerm.ToLowerInvariant())
{
Status = "";
Packages.Clear();
Packages.AddRange(r.Result);
}
SearchesInProgress--;
}, TaskScheduler.FromCurrentSynchronizationContext());
}
};
}
