//初始化页面和计时器
public MailPage()
{
this.InitializeComponent();
listview.ItemsSource = source;
Mailbox = new MailViewModel();
// 创建后台线程定时器，每5秒检查一次新信息
timer = new DispatcherTimer();
timer.Tick += (s, e) => {
if (onpage == true)
{
check_mail();
}
};
timer.Interval = TimeSpan.FromMilliseconds(5000);
timer.Start();
}
//被导航到此页面后执行的动作
protected override void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
onpage = true;
dtm = DataTransferManager.GetForCurrentView();
dtm.DataRequested += dtm_DataRequested;
//恢复之前页面显示的信箱
if (e.Parameter.GetType() == typeof(MailViewModel))
{
this.Mailbox = (MailViewModel)(e.Parameter);
if (localseetings.Values["box"].ToString() == "send")
{
Sql_Select_mailbox("sender_box");
}
else
{
Sql_Select_mailbox("receiver_box");
}
}
}
