asp.net获取客户端IP Class

using System;
using System.Web;


namespace Plugins
{
    public class ClientIP
    {
        public static string GetUserIP()
        {
            string result = String.Empty;

            result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
            if (null == result || result == String.Empty)
            {
                result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
            }

            if (null == result || result == String.Empty)
            {
                result = HttpContext.Current.Request.UserHostAddress;
            }

            if (null == result || result == String.Empty)
            {
                return "0.0.0.0";
            }

            return result;
        }
    }
}

//注释就不写了，自己调用就行了。