WP8程序内禁止截图

public static class PhoneApplicationPageExtensionMethods
{
    public static bool CanSetScreenCaptureEnabled(this PhoneApplicationPage page)
    {
        return Environment.OSVersion.Version >= new Version(8, 0, 10322);
    }

    public static void SetScreenCaptureEnabled(this PhoneApplicationPage page, bool enabled)
    {
        var propertyInfo = typeof(PhoneApplicationPage).GetProperty("IsScreenCaptureEnabled");

        if (propertyInfo == null)
        {
            throw new NotSupportedException("Not supported in this Windows Phone version!");
        }

        propertyInfo.SetValue(page, enabled);
    }

    public static bool GetScreenCaptureEnabled(this PhoneApplicationPage page)
    {
        var propertyInfo = typeof(PhoneApplicationPage).GetProperty("IsScreenCaptureEnabled");

        if (propertyInfo == null)
        {
            throw new NotSupportedException("Not supported in this Windows Phone version!");
        }

        return (bool)propertyInfo.GetValue(page);
    }
}

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

        if (this.CanSetScreenCaptureEnabled())
        {
            this.SetScreenCaptureEnabled(false);
        }
    }
}

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