C#检查网络是否连通

C#检查网络是否连通

C#.Net检测网络在线状态

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Runtime.InteropServices;

namespace yunjson.com
{
    public partial class Connected : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            //True 为连通   False 为断开
            bool Urlstate = IsConnected();
            Response.Write(Urlstate);
        }

        [DllImport("wininet.dll")]
        private extern static bool InternetGetConnectedState(out int connectionDescription, int reservedValue);
        /// <summary>
        ///  C#检查网络是否连通
        /// </summary>
        /// <returns></returns>
        private bool IsConnected()
        {
            int I = 0;
            bool state = InternetGetConnectedState(out I, 0);
            return state;
        }
    }
}