Question

选中该复选框后，我希望能够获取datepicker / timepicker的值。会发生的是它能够获得该值，但是当我尝试更改该值时，它将不会更改，因为它将返回到之前的值。我做错了什么？以下是我的代码：

protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
    {
        base.OnNavigatedTo(e);


        if (NavigationContext.QueryString.ContainsKey("Id"))
        {
            Id.Text = NavigationContext.QueryString["Id"];

        }


        ScheduledAction currentReminder = ScheduledActionService.Find(NavigationContext.QueryString["Id"]);

        if (currentReminder == null)
        {
            cBox.IsChecked = false;

        }
        else 
        {
            cBox.IsChecked = true;
            rrDate.Value = currentReminder.BeginTime;
            hiddenTime.Text = rrDate.Value.ToString();
            rrTime.Value = DateTime.Parse(hiddenTime.Text);
        }
    }

Answer 1

当您尝试更改datepicker值时，每次都会触发OnNavigatedTo事件。这是解决方案，这可能会对您有所帮助。

protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
    {
        base.OnNavigatedTo(e);
  if(e.NavigationMode!=NavigationMode.Back)
    {
        if (NavigationContext.QueryString.ContainsKey("Id"))
        {
            Id.Text = NavigationContext.QueryString["Id"];

        }
        ScheduledAction currentReminder = ScheduledActionService.Find(NavigationContext.QueryString["Id"]);
        if (currentReminder == null)
        {
            cBox.IsChecked = false;
        }
        else 
        {
            cBox.IsChecked = true;
            rrDate.Value = currentReminder.BeginTime;
            hiddenTime.Text = rrDate.Value.ToString();
            rrTime.Value = DateTime.Parse(hiddenTime.Text);
        }
      }
    }

OnNavigateTo更改日期/时间选择器值 - windows phone

1 个答案: