public async void LoadConversations()
{
var cons = await await this.CurrentClient.ConnectAsync().ContinueWith<Task<IEnumerable<AVIMConversation>>>(t =>
{
return this.CurrentClient.GetQuery().FindAsync();
});
if (cons != null)
{
foreach (var c in cons)
{
var cListVM = new ConversationViewModel(c);
this.ConversationsListVM.Add(cListVM);
NotifyPropertyChanged("ConversationListVM");
}
}
}
public async void LoadConversations()
{
var cons = await await this.CurrentClient.ConnectAsync().ContinueWith <Task <IEnumerable <AVIMConversation> > >(t =>
{
return(this.CurrentClient.GetQuery().FindAsync());
});
if (cons != null)
{
foreach (var c in cons)
{
var cListVM = new ConversationViewModel(c);
this.ConversationsListVM.Add(cListVM);
NotifyPropertyChanged("ConversationListVM");
}
}
}
private async void lls_contacts_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (lls_contacts.SelectedItem == null)
return;
var contact = e.AddedItems[0] as DemoContact;//选择的联系人
var conversations = await App.ViewModel.CurrentClient.GetQuery().WhereContains("m", contact.UserId).FindAsync();//查询之前是否有过对话
AVIMConversation conversation = null;
if (conversations.Count() > 0)
{
conversation = conversations.FirstOrDefault();//如果有就不用创建新的。
}
else
{
conversation = await App.ViewModel.CurrentClient.CreateConversationAsync(contact.UserId, "xxxx", new Dictionary<string, object>() { { "type", "private" } });//创建新的对话，并且加上自定义的属性标识它为一个 私有的对话（私聊）
}
var existVMs = App.ViewModel.ConversationsListVM.Where(t =>
{
if (t.AVConversation == null)
return false;
return t.AVConversation.ConversationId == conversation.ConversationId;
}
);
ConversationViewModel existVM = null;
if (existVMs.Count() == 0)
{
existVM = new ConversationViewModel() { AVConversation = conversation };
App.ViewModel.ConversationsListVM.Add(existVM);
}
else
{
existVM = existVMs.FirstOrDefault();
}
App.ViewModel.SelectedConversationVM = existVM;
lls_contacts.SelectedItem = null;
NavigationService.Navigate(new Uri("/Conversation.xaml", UriKind.RelativeOrAbsolute));
}
