用c#监控网络状态

1.查询当前网络状态：

using  Microsoft.VisualBasic.Devices;
 
//判断当前网络连接状态
 
Network nw=new Network();
 
if(nw.IsAvailable)
 
    lbmsg.Text="网络已连接";
 
else
 
    lbmsg.Text="网络已断开";

2.实时监控网络状态

using System.Net.NetworkInformation;
// Constructor
public MainPage()
{
   InitializeComponent();
 
   // Subscribe to the NetworkAvailabilityChanged event
   DeviceNetworkInformation.NetworkAvailabilityChanged += new EventHandler<NetworkNotificationEventArgs>(NetworkAvailabilityChanged);
}
 
void NetworkAvailabilityChanged(object sender, NetworkNotificationEventArgs e)
{
 
   string msg="";
   if(e.IsAvailable)
   {
     msg="网络已连接";
 
   }
   else
  {
    msg="网络已断开";
  }
  Dispatcher.BeginInvoke(() => {
  lbmsg.Text =msg; });
}