windows phone 8 - 50 报警限制

Question

我正在 windows mobile phone v8 中开发一个应用程序。它需要添加 60 个警报（每天 2 个警报），但 msdn article 中描述的警报限制为 50 个 单击按钮时，我必须在循环中创建所有 60 个警报，或者我可以添加 10 个警报，并且可以在最后一个警报开始或结束时再添加 10 个。我已经搜索但没有找到任何解决方案。 当警报对话框打开或警报开始时是否有任何事件，也许我可以检查警报是否是最后一个，然后我可以再添加 10 个警报并删除或替换以前的警报。有什么建议 ？ 这是我的代码

QList 的值取自数据库

for (int i = 0; i < QList.Count; i++)
           {
               //double seconds = 60.0 * (double)i;
               string alarmName = "Sehar Alert " + i.ToString();
               Alarm alarm = new Alarm(alarmName);
               alarm.Content = "Its Sehar time in " + Cityname + " City. " + i.ToString();


               var reminder = ScheduledActionService.Find(alarmName);


               if (reminder != null)
               {
                   ScheduledActionService.Remove(alarmName);
               }
               string datetime = QList[i].date +" "+ QList[i].Sehar;
               DateTime sherTime = Convert.ToDateTime(datetime);
               if (sherTime > sherT)
               {

                   // DateTime seharTime = new DateTime(2014, 6, 10, 10, 12, 0);
                   alarm.BeginTime = sherTime;// DateTime.Now.AddSeconds(seconds);
                   alarm.Sound = new Uri("Assets/Sounds/azan1.mp3", UriKind.Relative);
                   //  alarm.ExpirationTime = alarm.BeginTime.AddSeconds(10.0);

                   alarm.RecurrenceType = RecurrenceInterval.None;

                   ScheduledActionService.Add(alarm);
               }
               // Aftar time in Different City
               string IftarName = "Iftar Alert " + i.ToString();
               Alarm Ifatealarm = new Alarm(IftarName);
               Ifatealarm.Content = "Its Aftar time in " + Cityname + " City. " + i.ToString();


               var Iftarreminder = ScheduledActionService.Find(IftarName);


               if (Iftarreminder != null)
               {
                   ScheduledActionService.Remove(IftarName);
               }
               string Iftardatetime = QList[i].date + " " + QList[i].Iftar;
               DateTime IfTarTime = Convert.ToDateTime(Iftardatetime);
               if (IfTarTime > sherT)
               {


                   // DateTime seharTime = new DateTime(2014, 6, 10, 10, 12, 0);
                   Ifatealarm.BeginTime = sherTime;// DateTime.Now.AddSeconds(seconds);
                   Ifatealarm.Sound = new Uri("Assets/Sounds/azan1.mp3", UriKind.Relative);
                   //  alarm.ExpirationTime = alarm.BeginTime.AddSeconds(10.0);

                   Ifatealarm.RecurrenceType = RecurrenceInterval.None;

                   ScheduledActionService.Add(Ifatealarm);
               }

           }

Answer 1

在您的App.Xaml.cs 中，您可以订阅您的RootFrame 的Obscured 和Unobscured 事件。

 RootFrame.Obscured += new EventHandler<ObscuredEventArgs>(RootFrame_Obscured);
    RootFrame.Unobscured += new EventHandler(RootFrame_Unobscured);

当警报弹出时，RootFrame_Unobscured 将被触发；关闭它后，RootFrame_Obscured 将被解雇。