如何获取文本框文本从空白页到MainPage？

Question

I want to get the text from blankpage.xaml to Mainpage.xaml

I try to use this on MainPage.xaml:

protected override void OnNavigatedTo(NavigationEventArgs e)
{
  enter.Text = (App.Current as App).trytext;
}

but there is an error that trytext could not found so i use and if statement:

protected override void OnNavigatedTo(NavigationEventArgs e) 
{
        if (enter.Text == "")
        {
            enter.Text = "";
        }
        else
        {
            enter.Text = (App.Current as App).trytext;
        }
}

But when I get the text from blankpage there is no text when I get back to mainpage

please help!

Answer 1

I'm not sure what you're trying to do, but it seems like you're trying to creating a variable that's accessible through the whole application?

If you want to pass some data from page 1 to page 2, you can pass the information in the Navigate method.

Probably you're calling something like

Frame.Navigate(typeof(MainPage));

The Navigate method has an extra parameter in which you can pass your info. Call it like Frame.Navigate(typeof(MainPage), enter.Text);

In the OnNavigatedTo you can get the value from the NavigationEventArgs. probably something like:

enter.Text = e.Parameter.ToString();