public void RefreshList()
{
BackgroundWorker w = new BackgroundWorker();
IsLoading = true;
w.DoWork += (obj, args) => args.Result = AmazonClient.GetInstances();
w.RunWorkerCompleted += (obj, args) =>
{
IsLoading = false;
if (args.Error != null)
{
_updateTimer.IsEnabled = false;
throw new Exception("Error downloading server list: " + args.Error.Message, args.Error);
}
var newInstances = args.Result as List <Instance>;
var previousSelection = listBox.SelectedItem as Instance;
using (InstanceCollectionView.DeferRefresh())
AmazonClient.MergeInstanceList(Instances, newInstances);
if (listBox.Items.Count > 0)
{
if (previousSelection != null && listBox.Items.Contains(previousSelection))
{
listBox.SelectedItem = previousSelection;
}
else
{
listBox.SelectedIndex = 0;
}
}
};
w.RunWorkerAsync();
}
private void OK_Click(object sender, RoutedEventArgs e)
{
try
{
Cursor = Cursors.Wait;
if (!App.CheckConfig())
{
return;
}
if (!AmazonClient.CheckConnection())
{
return;
}
DialogResult = true;
}
finally
{
Cursor = Cursors.Arrow;
}
}