我有一个更新TreeView
的方法。如果我不使用BackgroundWorker
,一切都很好。但是,如果我用了,我的TreeViewItem
就不会更新,但它的数据内容确实发生了改变。另外,这个也可以正常工作:item.IsEnabled = false;
private void twSports_Expanded(object sender, RoutedEventArgs e)
{
TreeViewItem item = e.OriginalSource as TreeViewItem;
TreeLeaf leaf = item.DataContext as TreeLeaf; var bgWorker = new BackgroundWorkerOnGrid(gridPartitions);
bgWorker.DoWork += delegate(object s, DoWorkEventArgs args)
{
if (leaf.Item != null)
{
if (leaf.Item.GetType() == typeof(SportType))
{
SportType sport = leaf.Item as SportType;
args.Result = LoadSportPartitions(sport);
}
if (leaf.Item.GetType() == typeof(SportPartition))
{
SportPartition partition = leaf.Item as SportPartition;
args.Result = LoadSportPartitions(partition);
}
}
};
bgWorker.RunWorkerCompleted += delegate(object s, RunWorkerCompletedEventArgs args)
{
List<SportPartition> partitions = args.Result as List<SportPartition>;
if (partitions != null)
{
leaf.LoadChilds(partitions.ToArray()); //it doesn't work
item.IsEnabled = false; //it works
}
(s as BackgroundWorkerOnGrid).Dispose();
};
bgWorker.RunWorkerAsync(leaf.Item);}
有什么想法吗?