c# 判断网络是连接到互联网

时间：2014-05-31 01:02:49 收藏：0 阅读：284

[System.Runtime.InteropServices.DllImport("wininet")]

private extern static bool InternetGetConnectedState(out int connectionDescription, int reservedValue);

private void button1_Click(object sender, EventArgs e)

{

int i = 0;

if (InternetGetConnectedState(out i, 0))

MessageBox.Show("联网状态");

else

MessageBox.Show("你网线掉了啦");

}

修改下

[System.Runtime.InteropServices.DllImport("wininet")]

private extern static bool InternetGetConnectedState(out int connectionDescription, int reservedValue);

//判断网络是连接到互联网

public static bool IsNetWorkConnect()

{

int i = 0;

return InternetGetConnectedState(out i, 0) ? true:false;

}

if ( IsNetWorkConnect() )

MessageBox.Show("已连接到互联网");

else

MessageBox.Show("无网络")