ASP.NET实现根据IP获取省市地址的方法

            get { return errMsg; }
        }

        //搜索匹配数据#region 搜索匹配数据
        private int QQwry()
        {
            string pattern = @"(((d{1,2})|(1d{2})|(2[0-4]d)|(25[0-5])).){3}((d{1,2})|(1d{2})|(2[0-4]d)|(25[0-5]))";
            Regex objRe = new Regex(pattern);
            Match objMa = objRe.Match(ip);
            if (!objMa.Success)
            {
                this.errMsg = "IP格式错误";
                return 4;
            }

            long ip_Int = this.IpToInt(ip);
            int nRet = 0;
            if (ip_Int >= IpToInt("127.0.0.0") && ip_Int <= IpToInt("127.255.255.255"))
            {
                this.country = "本机内部环回地址";
                this.local = "";
                nRet = 1;
            }
            else if ((ip_Int >= IpToInt("0.0.0.0") && ip_Int <= IpToInt("2.255.255.255")) || (ip_Int >= IpToInt("64.0.0.0") && ip_Int <= IpToInt("126.255.255.255")) || (ip_Int >= IpToInt("58.0.0.0") && ip_Int <= IpToInt("60.255.255.255")))
            {
                this.country = "网络保留地址";
                this.local = "";
                nRet = 1;
            }
            objfs = new FileStream(this.dataPath, FileMode.Open, FileAccess.Read);