C#获取IP

//获取客户端IP地址
    public string getIP()
    {
        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;

    }