Question

I would like to make a simple way to write/read to object element in WP7. Something is not working properly. My way of thinking and what I have already done is like that:

First I create a class that represents my object. I added static string just to see if everything works well:

namespace SimpleObject.Objects
{
    public class Entry
    {
        public string entrytitle { get; set; }
        public string entrycomment { get; set; }
        public string entrycat = "works";

        public Entry() { }
        public Entry(string Entrytitle, string Entrycomment, string Entrycat)
        {

            this.entrytitle = Entrytitle;
            this.entrycomment = Entrycomment;
            this.entrycat = Entrycat;
        }

        public string entry { get; set; }

    }
}

Then, as I read in some articles I need to make some changes in App.xaml.cs Here we go then:

using SimpleObject.Objects;

Before App() I put this:

public static Entry E;

Then in App() this:

UnhandledException += new EventHandler<ApplicationUnhandledExceptionEventArgs>(Application_UnhandledException);

E = new Entry();

InitializeComponent();

Then my UI is two pages. One is a form to input data, second to read. Under application bar button I have:

private void ApplicationBarIconButton_Click(object sender, System.EventArgs e)
        {
            Entry E = new Entry
            {
                entrytitle = TitleTextBox.Text,
                entry = CommentTextBox.Text,
            };

            this.NavigationService.Navigate(new Uri("/Page2.xaml", UriKind.Relative));
            MessageBox.Show("Category added!");

        }

Finally page that present results:

private void button1_Click(object sender, RoutedEventArgs e)
        {
            TextBlock1.Text = App.E.entrycat;
            TextBlock2.Text = App.E.entrytitle;
        }

And second TextBlock gives me nothing…

Answer 1

You’re never setting the global static values. In your button click, it should be this:

private void ApplicationBarIconButton_Click(object sender, System.EventArgs e)
{
    App.E.entrytitle = TitleTextBox.Text,
    App.E.entrycat = CommentTextBox.Text,

    this.NavigationService.Navigate(new Uri("/Page2.xaml", UriKind.Relative));
}