private async void Btnadd_Click(object sender, RoutedEventArgs e)
{
if (IsSuccess)
{
try
{
AVUser friend = await AVUser.Query.WhereEqualTo("username", friendname.Text).FirstAsync();
//先检查对方是否已经为好友
if (Conversation.MemberIds.Contains(friend.ObjectId))
{
MessageBox.Show("你们已经是好友啦");
}
else
{
//不是好友再检测对方是否在线
List <string> friends = new List <string>
{
friend.ObjectId
};
if ((await User.PingAsync(targetClientIds: friends)).First().Item2)
{
//在线
await User.CreateConversationAsync(friend.ObjectId, isUnique : true);
MessageBox.Show("添加成功,等待对方确认");
Close();
}
else
{
//不在线
MessageBox.Show("对方不在线，请稍后重试");
}
}
}
catch (AVException error)
{
MessageBox.Show(error.Message);
}
}
else
{
Friendname_LostFocus(new object(), new RoutedEventArgs());
}
}
//绑定好友信息
private async void BindingFriendListSrouce(string newfriend = null)
{
//完全重新加载list
if (newfriend == null)
{
//如果有好友的话
if (FriendsConversation.MemberIds != null)
{
//TODO:优化成add
MyFriendsList.Clear();
//显示自己的好友
foreach (var online in await User.PingAsync(targetClientIds: FriendsConversation.MemberIds))
{
if (online.Item1 != AVUser.CurrentUser.ObjectId)
{
var user = await AVUser.Query.GetAsync(online.Item1);
//将获取到的好友信息保存到列表中,根据client判断用户是否在线
MyFriendsList.Add(new UserList(user, online.Item2));
}
}
//如果有离线信息的话,将离线的消息保存==》TODO：离线消息顺序有变化，待解决
if (OfflineMessageList != null)
{
App.Current.Dispatcher.Invoke((Action)(() =>
{
OfflineMessageList.ForEach((messgae) =>
{
MyFriendsList.ForEach((Friend) =>
{
if (Friend.Friend.ObjectId == messgae.Message.FromClientId)
{
//将消息加入对应好友的消息列表
Friend.MessageList.Add(new Message(messgae.Message));
//在主页面对应用户上做提示
Friend.Visibility = Visibility.Visible;
}
});
});
//最后清空离线消息
OfflineMessageList = null;
}));
}
}
}
//仅add
else
{
List <string> friends = new List <string>
{
newfriend
};
foreach (var online in await User.PingAsync(targetClientIds: friends))
{
if (online.Item1 != AVUser.CurrentUser.ObjectId)
{
var user = await AVUser.Query.GetAsync(online.Item1);
//将获取到的好友信息保存到列表中,根据client判断用户是否在线
MyFriendsList.Add(new UserList(user, online.Item2));
}
}
}
//将列表中的好友信息绑定到listbox里
friendlist.ItemsSource = null;
friendlist.ItemsSource = MyFriendsList;
}