在另一个 .xaml 页面上启用按钮

Question

我有一个按钮'ReadMore' 定义了Page.xaml。当我单击关闭 ThumbnailDetails.xaml 的按钮时，如何再次启用它？用户选择@aListBox 的项目，顺便将他们定向到ThumbnailDetails.xaml。

不知怎的，它不起作用？

Page.xaml.cs：

void NewsList_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    StaffNews news = (StaffNews) NewsList.SelectedItem;
    if (news != null)
    {
        DetailsView.DataContext = news;
        DetailsView.Visibility = Visibility.Visible;
        //testing!!!
        ReadMore.IsEnabled = false;
    }                   
}

ThumbnailDetails.xaml.cs

//set the Visibility of the UserControl to "Collapsed" - 
//which will cause it to disappear from the screen and 
//return the user to the content below it:
void CloseBtn_Click(object sender, RoutedEventArgs e)
{
    Visibility = Visibility.Collapsed;

    //testing if button ReadMore will be reenabled on closebtn_clicked
    Page a = new Page();
    a.ReadMore.IsEnabled = true;
}

Answer 1

可能发生的情况是 Page.xaml 被重新加载，因此状态丢失。您如何将它们“引导”到其他页面？这可能是您的问题，因为 Web 应用程序是无状态的。