private async Task LoadNextPackageChunk()
{
ErrorMessage = null;
IsEditable = false;
var tokenSource = new CancellationTokenSource();
CurrentCancellationToken = tokenSource;
List <PackageItem> data = new List <PackageItem>();
try {
data = await _packageFinder.LoadNextPackageSet(tokenSource.Token);
} catch (Exception e) {
ErrorMessage = e.Message;
}
foreach (var item in data)
{
NuGetPackageResults.Add(item);
}
OnPropertyChanged("NuGetPackageResults");
if (CurrentCancellationToken == tokenSource)
{
CurrentCancellationToken = null;
}
tokenSource.Dispose();
IsEditable = true;
}
public MainWindowViewModel()
{
ChangeSourceCommand = new CustomCommand(async(source) => {
NuGetPackageResults.Clear();
_packageFinder = new PackageFinder(source as string);
await LoadNextPackageChunk();
SelectedPackage = NuGetPackageResults.Count > 0 ? NuGetPackageResults[0] as PackageItem : null;
});
LoadNextPackageSet = new CustomCommand(
(p) => _packageFinder.HasMoreData && IsEditable,
async(p) => { await LoadNextPackageChunk(); }
);
CancelCommand = new CustomCommand(
(p) => !IsEditable && CurrentCancellationToken != null,
(p) => {
CurrentCancellationToken.Cancel();
IsEditable = true;
}
);
ChangeSourceCommand.Execute(Sources[1]);
}