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c#调用百度api,根据经度和纬度获取地理位置信息,返回Json

发布:2021/4/9 11:27:38作者:管理员 来源:本站 浏览次数:1002

调用百度api,根据经度和纬度获取地理位置信息,返回Json。

C#代码:

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using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Net.Http;
 
    public class LocationService
    {
        //百度api
        private static string url = @"http://api.map.baidu.com/geocoder/v2/?location={0}&output=json&ak=WEc8RlPXzSifaq9RHxE1WW7lRKgbid6Y";
 
        /// <summary>
        /// 根据经纬度获取地理位置
        /// </summary>
        /// <param name="lat">纬度</param>
        /// <param name="lng">经度</param>
        /// <returns>具体的地埋位置</returns>
        public static string GetLocation(string lat, string lng)
        {
            HttpClient client = new HttpClient();
            string location = string.Format("{0},{1}", lat, lng);
            string bdUrl = string.Format(url, location);
            string result = client.GetStringAsync(bdUrl).Result;
            var locationResult = (JObject)JsonConvert.DeserializeObject(result);
 
            if (locationResult == null || locationResult["result"] == null || locationResult["result"]["formatted_address"] == null)
                return string.Empty;
 
            var address = Convert.ToString(locationResult["result"]["formatted_address"]);
            if (locationResult["result"]["sematic_description"] != null)
                address += " " + Convert.ToString(locationResult["result"]["sematic_description"]);
            return address;
        }
    }

调用示例1:

LocationService.GetLocation("0","0")

返回Json:

{{  "country": "",  "country_code": -1,  "province": "",  "city": "",  "district": "",  "adcode": "0",  "street": "",  "street_number": "",  "direction": "",  "distance": ""}}

调用示例2:

LocationService.GetLocation("36.2585", "120.27")

返回Json:

 {{  "status": 0,  "result": {    "location": {      "lng": 120.26999999999993,      "lat": 36.25849989472075    },    "formatted_address": "山东省青岛市城阳区和融路",    "business": "上马",    "addressComponent": {      "country": "中国",      "country_code": 0,      "province": "山东省",      "city": "青岛市",      "district": "城阳区",      "adcode": "370214",      "street": "和融路",      "street_number": "",      "direction": "",      "distance": ""    },    "pois": [],    "roads": [],    "poiRegions": [],    "sematic_description": "青岛宝佳自动化设备有限公司北575米",    "cityCode": 236  }}}

 

=================================================================

以下内容转自他人博客,返回xml格式的例子

博客地址:http://www.cnblogs.com/_zjl/p/3431525.html

 

代码:

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private string GetAddress(string lng, string lat)
       {
           try
           {
               string url = @"http://api.map.baidu.com/geocoder/v2/?ak=E4805d16520de693a3fe707cdc962045&callback=renderReverse&location=" + lat + "," + lng + @"&output=xml&pois=1";
               WebRequest request = WebRequest.Create(url);
               request.Method = "POST";
               XmlDocument xmlDoc = new XmlDocument();
               string sendData = xmlDoc.InnerXml;
               byte[] byteArray = Encoding.Default.GetBytes(sendData);
 
               Stream dataStream = request.GetRequestStream();
               dataStream.Write(byteArray, 0, byteArray.Length);
               dataStream.Close();
 
               WebResponse response = request.GetResponse();
               dataStream = response.GetResponseStream();
               StreamReader reader = new StreamReader(dataStream, System.Text.Encoding.GetEncoding("utf-8"));
               string responseXml = reader.ReadToEnd();
 
               XmlDocument xml = new XmlDocument();
               xml.LoadXml(responseXml);
               string status = xml.DocumentElement.SelectSingleNode("status").InnerText;
               if (status == "0")
               {
 
                   XmlNodeList nodes = xml.DocumentElement.GetElementsByTagName("formatted_address");
                   if (nodes.Count > 0)
                   {
                       return nodes[0].InnerText;
                   }
                   else
                       return "未获取到位置信息,错误码3";
               }
               else
               {
                   return "未获取到位置信息,错误码1";
               }
           }
           catch (System.Exception ex)
           {
               return "未获取到位置信息,错误码2";
           }
       }


url中的参数:

参数 是否必须 默认值 格式举例 含义
coordtype bd09ll bd09ll 百度经纬度坐标 坐标的类型,目前支持的坐标类型包括:bd09ll(百度经纬度坐标)、gcj02ll(国测局经纬度坐标)、wgs84ll( GPS经纬度)
location 38.76623,116.43213 lat<纬度>,lng<经度> 根据经纬度坐标获取地址
pois 0 0 是否显示指定位置周边的poi,0为不显示,1为显示。当值为1时,显示周边100米内的poi。

 

 

运行方法返回的结果:

北京市海淀区中关村大街27号1101-08室

 

从百度api返回的结果:

复制代码
  <?xml version="1.0" encoding="utf-8" ?> 
- <GeocoderSearchResponse>
  <status>0</status> 
- <result>
- <location>
  <lat>39.983424051248</lat> 
  <lng>116.32298703399</lng> 
  </location>
  <formatted_address>北京市海淀区中关村大街27号1101-08室</formatted_address> 
  <business>中关村,人民大学,苏州街</business> 
- <addressComponent>
  <streetNumber /> 
  <street>中关村大街</street> 
  <district>海淀区</district> 
  <city>北京市</city> 
  <province>北京市</province> 
  </addressComponent>
  <cityCode>131</cityCode> 
- <pois>
- <poi>
  <addr>中关村西区南侧(中关村科技园区内)</addr> 
  <distance>0.050000</distance> 
  <name>中关村大厦</name> 
  <poiType>办公大厦,商务大厦</poiType> 
  <tel>(010)82856666</tel> 
  <zip>100000</zip> 
- <point>
  <x>116.32298658484</x> 
  <y>39.983423843929</y> 
  </point>
  </poi>
- <poi>
  <addr>中关村大街27号</addr> 
  <distance>0.050000</distance> 
  <name>眉州东坡酒楼中关村店</name> 
  <poiType>中餐馆,餐饮</poiType> 
  <tel>(010)82856948</tel> 
  <zip /> 
- <point>
  <x>116.32298658484</x> 
  <y>39.983423843929</y> 
  </point>
  </poi>
- <poi>
  <addr>中关村大街27号</addr> 
  <distance>0.050000</distance> 
  <name>中国人民财产保险中关村营业部</name> 
  <poiType>中国人民财产保险,保险公司,金融</poiType> 
  <tel>(010)82856779</tel> 
  <zip>100000</zip> 
- <point>
  <x>116.32298658484</x> 
  <y>39.983423843929</y> 
  </point>
  </poi>
- <poi>
  <addr>北京市海淀区</addr> 
  <distance>94.432081</distance> 
  <name>光合作用书房</name> 
  <poiType>图书音像,购物</poiType> 
  <tel /> 
  <zip /> 
- <point>
  <x>116.32239334388</x> 
  <y>39.983890240676</y> 
  </point>
  </poi>
- <poi>
  <addr>中关村大街27号</addr> 
  <distance>42.195731</distance> 
  <name>建行中关村支行</name> 
  <poiType>中国建设银行,银行,金融</poiType> 
  <tel /> 
  <zip>100000</zip> 
- <point>
  <x>116.32292037972</x> 
  <y>39.983711118168</y> 
  </point>
  </poi>
- <poi>
  <addr>北京市海淀区</addr> 
  <distance>62.342644</distance> 
  <name>海淀医院-激光整形美容部</name> 
  <poiType>美容美发,生活服务</poiType> 
  <tel /> 
  <zip /> 
- <point>
  <x>116.32317954086</x> 
  <y>39.98301950182</y> 
  </point>
  </poi>
- <poi>
  <addr>中关村大街19号新中关购物中心1楼</addr> 
  <distance>112.983688</distance> 
  <name>星巴克新中关店</name> 
  <poiType>星巴克,咖啡厅,休闲餐饮,餐饮</poiType> 
  <tel>(010)82486056</tel> 
  <zip /> 
- <point>
  <x>116.32218215226</x> 
  <y>39.983899777278</y> 
  </point>
  </poi>
  </pois>
  </result>
  </GeocoderSearchResponse>
复制代码

xml说明:

名称 类型 说明
status constant 返回结果状态值, 成功返回0,其他值请查看附录
location lat 纬度坐标
lng 经度坐标
formatted_address 结构化地址信息
business 所在商圈信息,如 "人民大学,中关村,苏州街"
addressComponent city 城市名
district 区县名
province 省名
street 街道名
street_number 街道门牌号
pois(周边poi数组) addr 地址信息
cp 数据来源
distance 离坐标点距离
name poi名称
poiType poi类型,如’ 办公大厦,商务大厦’
point poi坐标{x,y}
tel 电话
uid poi唯一标识
zip 邮编

附录:

返回码 定义
0 正常
1 服务器内部错误
2 请求参数非法
3 权限校验失败
4 配额校验失败
5 ak不存在或者非法
101 服务禁用
102 不通过白名单或者安全码不对
2xx 无权限
3xx 配额错误