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我在页面上实现了“Contact”对象的ObserveableCollection,并将其设置为longlistselector的itemsource。 “联系人”对象的所有属性均实现INotifyPropertyChanged。一旦添加到ObserveableCollection中,列表和属性显示正常。但是,无论何时我更改代码中的某个属性,更改都不会反映在UI中,直到我离开页面并返回。因此,数据绑定属性不会实时更新。Databound用户界面未更新
从XAML页面:
public ObservableCollection<Contact> contacts = new ObservableCollection<Contact>();
Contact[] data = ContactHandler.Singleton().GetContacts().Values.OrderBy(x => x.DisplayName.ToLower()[0]).ToArray();
int dataCount = data.Length;
this.LayoutRoot.Dispatcher.BeginInvoke(() =>
{
for (int x = 0; x < data.Length; x++)
{
contacts.Add(data[x]);
}
});
这里是我更新的 “人脉” 中的 “亮点” 属性:
private void contactList_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
Contact contact = contactList.SelectedItem as Contact;
if (contact != null)
{
Debug.WriteLine(contact.DisplayName + " is: " + contact.Highlight);
string uid = contact.UserID;
if (uids.Contains(uid))
{
uids.Remove(uid);
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
contact.Highlight = Visibility.Collapsed;
});
}
else
{
uids.Add(uid);
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
contact.Highlight = Visibility.Visible;
});
}
}