private void UpdateTasksFromDB(int chatID) { mTaskIDs.Clear(); DataTable rowMsgs = DatabaseMgr.GetChatTasks(mRoomID); if (rowMsgs == null) { return; } foreach (DataRow item in rowMsgs.Rows) { if (item["type"].ToString() == "addTask") { string taskID = item["info"].ToString(); mTaskIDs[taskID] = int.Parse(taskID); } else if (item["type"].ToString() == "delTask") { string taskID = item["info"].ToString(); mTaskIDs.Remove(taskID); } } }