网络连接状态的变化？

Question

这是一段用SL3写的程序

namespace YmgSilverlightApp
{
    public partial class MainPage : UserControl
    {
        public MainPage()
        {
            InitializeComponent();
            this.Loaded += new RoutedEventHandler(MainPage_Loaded);
            NetworkChange.NetworkAddressChanged += new NetworkAddressChangedEventHandler(NetworkChange_NetworkAddressChanged);
        }

        void NetworkChange_NetworkAddressChanged(object sender, EventArgs e)
        {

            IsNetworkAvailable();
        }

        void MainPage_Loaded(object sender, RoutedEventArgs e)
        {
            if (App.Current.IsRunningOutOfBrowser)
            {
                textBlock1.Text = "程序在浏览器之外";
            }
            else
            {
                textBlock1.Text = "程序在浏览器之中";
            }
            IsNetworkAvailable();
        }

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            if (App.Current.InstallState == InstallState.NotInstalled)
            {
                App.Current.Install();
            }
            else
            {
                MessageBox.Show("应用程序已安装！");
            }
        }
        private void IsNetworkAvailable()
        {
            if (NetworkInterface.GetIsNetworkAvailable())
            {
                textBlock2.Text = "网络连接正常";
            }
            else
            {
                textBlock2.Text = "网络连接受阻";
            }
        }
    }
}

 

程序在IE下运行，拔掉网线后，立刻显示“网络连接受阻”。放到浏览器之外运行后，拔掉网线，不会有这种变化，这其中的原因在哪里呢？

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yeminggeng

Answer 1

xp下不可以。Win7就好了。

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yeminggeng