添加引用:

using System.Runtime.InteropServices;

using System.Net.NetworkInformation;

        [DllImport("wininet.dll")]
private extern static bool InternetGetConnectedState(int Description, int ReservedValue); #region 方法一 /// <summary>
/// 用于检查网络是否可以连接互联网,true表示连接成功,false表示连接失败
/// </summary>
/// <returns></returns>
public static bool IsConnectInternet()
{
int Description = ;
return InternetGetConnectedState(Description, );
} #endregion 方法一 #region 方法二 /// <summary>
/// 用于检查IP地址或域名是否可以使用TCP/IP协议访问(使用Ping命令),true表示Ping成功,false表示Ping失败
/// </summary>
/// <param name="strIpOrDName">输入参数,表示IP地址或域名</param>
/// <returns></returns>
public static bool PingIpOrDomainName(string strIpOrDName)
{
try
{
Ping objPingSender = new Ping();
PingOptions objPinOptions = new PingOptions();
objPinOptions.DontFragment = true;
string data = "";
byte[] buffer = Encoding.UTF8.GetBytes(data);
int intTimeout = ;
PingReply objPinReply = objPingSender.Send(strIpOrDName, intTimeout, buffer, objPinOptions);
string strInfo = objPinReply.Status.ToString();
if (strInfo == "Success")
{
return true;
}
else
{
return false;
}
}
catch (Exception)
{
return false;
}
} #endregion 方法二

调用我就不写了,相信大家都会。

05-26 13:42