.net获取本机公网IP地址示例

代码很简单，直接看代码

using system;
using system.net;
using system.text.regularexpressions;

namespace keleyi.com
{
    public class getinternetip
    {
        public static string getip()
        {
            using (var webclient = new webclient())
            {
                try
                {
                    var temp = webclient.downloadstring("http://iframe.ip138.com/ic.asp");
                    var ip = regex.match(temp, @"\[(?<ip>\d+\.\d+\.\d+\.\d+)]").groups["ip"].value;
                    return !string.isnullorempty(ip) ? ip : null;
                }
                catch (exception ex)
                {
                    return ex.message;
                }
            }
        }
    }
}