asp.net中c#获取本机IP地址实例代码

namespace CSharpTest
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write(new Program().GetHostInfo());
            Console.ReadLine();
        }
        //获取本地IPd等信息
        protected string GetHostInfo()  
        {
            StringBuilder hostInfo = new StringBuilder("");
            IPAddress[] ipHost = Dns.GetHostAddresses(Dns.GetHostName());
            hostInfo.Append("本机名：");
            hostInfo.Append(Dns.GetHostName());
            hostInfo.Append("rn");
            hostInfo.Append("IP 地址：");
            hostInfo.Append("rn");

            foreach (IPAddress address in ipHost)
            {
                hostInfo.Append(address.ToString());
                hostInfo.Append("rn");
            }

            return hostInfo.ToString();
        }
    }
}

return ip;
}
private String GetIPAddress()
{
String str;
String Result = "";
String hostName = Dns.GetHostName();
IPAddress[] myIP = Dns.GetHostAddresses(hostName);
foreach (IPAddress address in myIP)
{
str = address.ToString();
for (int i = 0; i < str.Length; i++)
{
if (str[i] >= '0' && str[i] <= '9' || str[i] == '.') Result = str;
}
}
return Result;
}

?//得到网关地址
private string GetGateway() 
{ 
    //网关地址
    string strGateway = "";
    //获取所有网卡
    NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
    //遍历数组
    foreach (var netWork in nics)
    {
        //单个网卡的IP对象
        IPInterfaceProperties ip = netWork.GetIPProperties();
        //获取该IP对象的网关
        GatewayIPAddressInformationCollection gateways = ip.GatewayAddresses;
        foreach(var gateWay in gateways)
        {
            //如果能够Ping通网关
            if(IsPingIP(gateWay.Address.ToString()))
            {
                //得到网关地址
                strGateway = gateWay.Address.ToString();
                //跳出循环
                break;
            }
        }
 
        //如果已经得到网关地址
        if (strGateway.Length > 0) 
        {
            //跳出循环
            break;
        }
    }
 
    //返回网关地址
    return strGateway;
}
　　

?/// <summary>
/// 判断是否为正确的IP地址
/// </summary>
/// <param name="strIPadd">需要判断的字符串</param>
/// <returns>true = 是 false = 否</returns>
public static bool IsRightIP(string strIPadd) 
{
    //利用正则表达式判断字符串是否符合IPv4格式
    if (Regex.IsMatch(strIPadd, "[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}"))
    {
        //根据小数点分拆字符串
        string[] ips = strIPadd.Split('.');
        if (ips.Length == 4 || ips.Length == 6)
        {
            //如果符合IPv4规则
            if (System.Int32.Parse(ips[0]) < 256 && System.Int32.Parse(ips[1]) < 256 & System.Int32.Parse(ips[2]) < 256 & System.Int32.Parse(ips[3]) < 256)
                //正确
                return true;
            //如果不符合
            else
                //错误
                return false;
        }
        else
            //错误
            return false;
    }
    else
        //错误
        return false;
}
　　

?/// <summary>
/// 尝试Ping指定IP是否能够Ping通
/// </summary>
/// <param name="strIP">指定IP</param>
/// <returns>true 是 false 否</returns>
public static bool IsPingIP(string strIP) 
{
    try
    {
        //创建Ping对象
        Ping ping = new Ping();
        //接受Ping返回值
        PingReply reply = ping.Send(strIP, 1000);
        //Ping通
        return true;
    }
    catch
    {
        //Ping失败
        return false;
    }
}