C#实现获取百度经纬度及范围判断

#region 获取接口数据
        /// <summary>
        /// 获取接口数据
        /// </summary>
        /// <param name="vUrl"></param>
        /// <param name="vPara"></param>
        /// <returns></returns>
        public int GetSuNingDate(string address)
        {
            var url = "http://api.map.baidu.com/geocoder/v2/?output=xml&address= " + address + "&ak=K3rBg4kGLs7lt0aRTo1SvhwS";
            System.Net .HttpWebRequest request = (HttpWebRequest)System.Net .WebRequest.Create(url);
            request.Method = "Get";
            request.ContentType = "application/x-www-form-urlencoded";
            request.Timeout = 500000;
            System.Net .HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            System.IO .Stream responseStream = response.GetResponseStream();
            System.IO .StreamReader reader = new System.IO.StreamReader(responseStream, System.Text.Encoding.UTF8);
            string srcString = reader.ReadToEnd();
            response.Close();
            responseStream.Close();
            response = null;
            request = null;
            if (!string.IsNullOrEmpty(srcString))
            {
                string[] sArray = srcString.Split(new string[] { "<status>" }, StringSplitOptions.RemoveEmptyEntries);
                string[] sArray1 = sArray[1].Split(new string[] { "</status>" }, StringSplitOptions.RemoveEmptyEntries);//状态
                if (sArray1[0] == "0")
                {
                    string[] sArray2 = sArray1[1].Split(new string[] { "<location>" }, StringSplitOptions.RemoveEmptyEntries);
                    string[] sArray3 = sArray2[1].Split(new string[] { "</location>" }, StringSplitOptions.RemoveEmptyEntries);