公共变量wp7芒果

Question

hi i need to use a variables from page to show in another page at text block in windows phone 7. i got a problem that the second page doesn't declare the variables: here's a part of my code:

public static class MainPage : PhoneApplicationPage
{
    string result;//var i wanna use at the all application pages
    string status;//var i wanna use at the all application pages
    string userId;//var i wanna use at the all application pages
    string msg;//var i wanna use at the all application pages

    WebClient client;

    // Constructor
    public MainPage()
    {
        InitializeComponent();

        client = new WebClient();
        client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(client_DownloadStringCompleted);
    }
}

///second page
public partial class info : PhoneApplicationPage
{
    public info()
    {
        InitializeComponent();
        textBlock1.Text = result.value();
    }
}

but this code dosent work ny help??

Answer 1

but this code dosent work

Because your variables are private and their scope is limited to the MainPage class.

If you want them to be public, you have to add the public keyword.

Better: you should use properties instead:

public string Result { get; set; }

---

Also, you can't write a global variable . As C# is an object-oriented programming language, you'll have to use an instance of your MainPage class to access to your properties:

MainPage myPage = new MainPage();
....
textBlock1.Text = myPage.Result;

---

Another thing: you're using variables/properties, not functions. So you can't write result.value(); . Use result.value; instead.

I suggest you to have a look at this MSDN article about properties.

Answer 2

据我所知，您需要在MainPage类范围之外声明结果变量或添加public关键字