public Task <ReturnMessage> QueryMeetingExist(int meetingId)
{
Task <ReturnMessage> checkTask = _meetingManager.CheckMeetingServerStatus();
if (checkTask != null)
{
return(checkTask);
}
var tcs = new TaskCallback <ReturnMessage>("QueryMeetingExist");
if (_meetingManager.TaskCallbacks.ContainsKey(tcs.Name))
{
_meetingManager.TaskCallbacks.Remove(tcs.Name);
}
_meetingManager.TaskCallbacks.Add(tcs.Name, tcs);
var result = MeetingAgent.QueryMeetingExist(meetingId);
if (result != 0)
{
return(Task.FromResult(MessageManager.FailedToQueryMeeting));
}
return(tcs.Task);
}
