Question

I’m using this to make a web request and download some data:

public partial class MainPage : PhoneApplicationPage
{
    public MainPage()
    {
        InitializeComponent();

        var client = new WebClient();

        client.DownloadStringCompleted += (s, e) => {
            textBlock1.Text = e.Result;
        };

        client.DownloadStringAsync(new Uri("http://example.com"));
    }
}

The text of textBlock1 never changes even though e.Result has the correct data. How do I update that from the callback?

Edit: If I add MessageBox.Show(e.Result); in the callback along with the textBlock1.Text assignment, both the messsage box and the text box show the correct data.

Edit Again: If I add a TextBox and set it’s text right after the line textBlock1.Text line, they both show the correct text.

Answer 1

From browsing through the WP7 forums, a bunch of people were reporting that this was related to a video card driver issue. I’ve updated my ATI Radeon HD 3400 drivers to the latest version and it appears to work now.