.net有没有【判断本机是否连上互联网】的方法或属性？

[ls251544415]

PS：仅仅是连上，而不是是否有数据发送和接受

[wuyq11]

[DllImport("wininet.dll")]
private extern static bool InternetGetConnectedState(out int connectionDescription, int reservedValue);

public bool IsInternetConnected()
{
int i = 0;
return InternetGetConnectedState(out i, 0);
}
ping操作
AutoResetEvent waiter = new AutoResetEvent(false);
Ping myPing = new Ping();
myPing.PingCompleted += new PingCompletedEventHandler(myPing_PingCompleted);
string data = "OK";
byte[] buffer = Encoding.ASCII.GetBytes(data);
int timeout = 10000;
PingOptions options = new PingOptions(64, true);
myPing.SendAsync(_AppState.ServerName, timeout, buffer, options, waiter);

[ls251544415]

回1楼：
试了，可以
有没有判断是否连接上宽带网的API？

[ls251544415]

改正一下说法，应该是【判断本机是否有Internet访问】
就像WIndows7一样，有Internet访问，则托盘图标则没有叹号