using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Runtime.InteropServices;

public partial class Hy_De : System.Web.UI.Page
{
??? [DllImport("wininet.dll")]
??? private extern static bool InternetGetConnectedState(out int conn, int val);
??? protected void Page_Load(object sender, EventArgs e)
??? {

??? }

??? protected void Button1_Click(object sender, EventArgs e)
??? {
??????? int Out;
??????? if (InternetGetConnectedState(out Out, 0) == true)
??????? {
??????????? Response.Write("通!");
??????? }
??????? else
??????? {
??????????? Response.Write("不通!");
??????? }

??? }
}

判斷網絡連接是否通