c#封装百度web服务geocoding api 、百度坐标转换示例
1、创建基础参数类
public static class baiduconstparams
{
public const string placeapiv2search = "http://api.map.baidu.com/place/v2/search";
public const string placeapiv2detail = "http://api.map.baidu.com/place/v2/detail";
public const string placeapiv2eventsearch = "http://api.map.baidu.com/place/v2/eventsearch";
public const string placeapiv2eventdetail = "http://api.map.baidu.com/place/v2/eventdetail";
public const string geocodingapiv2 = "http://api.map.baidu.com/geocoder/v2/";
public const string geocodingapiv2reverse = "http://api.map.baidu.com/geocoder/v2/";
public const string translateapi = "http://openapi.baidu.com/public/2.0/bmt/translate";
public const string geoconvapi = "http://api.map.baidu.com/geoconv/v1/";
}
public static class baiduerrormessages
{
public const string notkey = "密钥不存在";
public const string lackparam = "缺少必要请求参数";
}
2、定义api错误信息与产品信息
public enum baidulbstype
{
placeapiv2search,
placeapiv2detail,
placeapiv2eventsearch,
placeapiv2eventdetail,
geocodingapiv2,
geocodingapiv2reverse,
translate,
geoconv
}
public enum status
{
/// <summary>
/// 正常
/// </summary>
ok = 0,
/// <summary>
/// 请求参数非法
/// </summary>
parameterinvalid = 2,
/// <summary>
/// 权限校验失败
/// </summary>
verifyfailure = 3,
/// <summary>
/// 配额校验失败
/// </summary>
quotafailure = 4,
/// <summary>
/// 不存在或者非法
/// </summary>
akfailure = 5,
/// <summary>
/// transform 内部错误
/// </summary>
internalerror = 1,
/// <summary>
/// from非法
/// </summary>
fromillegal = 21,
/// <summary>
/// to非法
/// </summary>
toillegal = 22,
/// <summary>
/// coords非法
/// </summary>
coordsillegal = 24,
/// <summary>
/// coords个数非法，超过限制
/// </summary>
coordscountillegal = 25
}
3、定义api结果返回实体映射类
public class baidugeocodingresults
{
/// <summary>
/// 返回结果状态值， 成功返回0，其他值请查看附录。
/// </summary>
[jsonproperty(propertyname = "status")]
public status status;
/// <summary>
/// 返回结果状态值， 成功返回0，其他值请查看附录。
/// </summary>
[jsonproperty(propertyname = "result")]
public baidugeocodingresult result;
}
public class baidugeocodingresult
{
/// <summary>
/// 经纬度坐标
/// </summary>
[jsonproperty(propertyname = "location")]
public baidugeocodingloaction location;
/// <summary>
/// 位置的附加信息，是否精确查找。1为精确查找，0为不精确。
/// </summary>
[jsonproperty(propertyname = "precise")]
public int precise;
/// <summary>
/// 可信度
/// </summary>
[jsonproperty(propertyname = "confidence")]
public int confidence;
/// <summary>
/// 地址类型
/// </summary>
[jsonproperty(propertyname = "level")]
public string level;
/// <summary>
/// 结构化地址信息
/// </summary>
[jsonproperty(propertyname = "formatted_address")]
public string formattedaddress;
/// <summary>
/// 所在商圈信息，如 "人民大学,中关村,苏州街"
/// </summary>
[jsonproperty(propertyname = "business")]
public string business;
/// <summary>
/// 具体地址
/// </summary>
[jsonproperty(propertyname = "addresscomponent")]
public baidugeocodingaddress addresscomponent;
}
public class baidugeocodingloaction
{
/// <summary>
/// 纬度值
/// </summary>
[jsonproperty(propertyname = "lat")]
public decimal lat;
/// <summary>
/// 经度值
/// </summary>
[jsonproperty(propertyname = "lng")]
public decimal lng;
}
public class baidugeocodingaddress
{
/// <summary>
/// 城市名
/// </summary>
[jsonproperty(propertyname = "city")]
public string city;
/// <summary>
/// 区县名
/// </summary>
[jsonproperty(propertyname = "district")]
public string district;
/// <summary>
/// 省名
/// </summary>
[jsonproperty(propertyname = "province")]
public string province;
/// <summary>
/// 街道名
/// </summary>
[jsonproperty(propertyname = "street")]
public string street;
/// <summary>
/// 街道门牌号
/// </summary>
[jsonproperty(propertyname = "street_number")]
public string streetnumber;
}
4、创建api通用处理类
public class baidulbs
{
private readonly string _key;
public static string currentrequest = "";
public baidulbs(string key)
{
_key = key;
}
/// <summary>
/// 请求
/// </summary>
/// <param name="param"></param>
/// <param name="baidulbstype"></param>
/// <param name="encoding"></param>
/// <param name="action"></param>
public void request(string param, baidulbstype baidulbstype, encoding encoding, action<string> action)
{
webclient webclient = new webclient { encoding = encoding };
string url = "";
switch (baidulbstype)
{
case baidulbstype.placeapiv2search:
url = string.format(baiduconstparams.placeapiv2search + "?{0}", param);
break;
case baidulbstype.placeapiv2detail:
url = string.format(baiduconstparams.placeapiv2detail + "?{0}", param);
break;
case baidulbstype.placeapiv2eventsearch:
url = string.format(baiduconstparams.placeapiv2eventsearch + "?{0}", param);
break;
case baidulbstype.placeapiv2eventdetail:
url = string.format(baiduconstparams.placeapiv2eventdetail + "?{0}", param);
break;
case baidulbstype.geocodingapiv2:
case baidulbstype.geocodingapiv2reverse:
url = string.format(baiduconstparams.geocodingapiv2 + "?{0}", param);
break;
case baidulbstype.translate:
url = string.format(baiduconstparams.translateapi + "?{0}", param);
break;
case baidulbstype.geoconv:
url = string.format(baiduconstparams.geoconvapi + "?{0}", param);
break;
}
currentrequest = url;
action(webclient.downloadstring(url));
}
/// <summary>
/// 响应
/// </summary>
/// <typeparam name="t"></typeparam>
/// <param name="param"></param>
/// <param name="baidulbstype"></param>
/// <param name="encoding"></param>
public t response<t>(string param, baidulbstype baidulbstype, encoding encoding)
{
t t = default(t);
request(param, baidulbstype, encoding, json =>
{
if (baidulbstype == baidulbstype.geocodingapiv2 || baidulbstype == baidulbstype.geocodingapiv2reverse)
{
if (json.contains("\"result\":[]"))
{
json = json.replace("\"result\":[]", "\"result\":{}");
}
}
t = (t)jsonconvert.deserializeobject(json, typeof(t));
});
return t;
}
public baidugeocodingresults baidugeocoding(string address, string city)
{
address = system.web.httputility.urlencode(address);
city = system.web.httputility.urlencode(city);
string request = string.format("address={0}&output=json&ak={1}&city={2}", address, _key, city);
var result = response<baidugeocodingresults>(request, baidulbstype.geocodingapiv2, encoding.utf8);
if (result.status == status.ok && result.result.location == null)
{
request = string.format("address={0}&output=json&ak={1}&city={2}", city + address, _key, city);
return response<baidugeocodingresults>(request, baidulbstype.geocodingapiv2, encoding.utf8);
}
return result;
}
public baidugeocodingresults baidugeocoding(string longitude, string dimensions, string pois)
{
var location = longitude + "," + dimensions;
string request = string.format("ak={0}&location={1}&pois={2}", _key, location, pois);
return response<baidugeocodingresults>(request, baidulbstype.geocodingapiv2, encoding.utf8);
}
public geoconvresults baidugeoconv(geoconvparams geoconvparams, ref list<geoconvpoi> geoconvpois)
{
geoconvparams.ak = _key;
return response<geoconvresults>(geoconvparams.tostring(ref geoconvpois), baidulbstype.geoconv, encoding.utf8);
}
public geoconvresults baidugeoconv(geoconvparams geoconvparams, geoconvpoi geoconvpoi)
{
geoconvparams.ak = _key;
list<geoconvpoi> geoconvpois = new list<geoconvpoi>
{
geoconvpoi
};
return response<geoconvresults>(geoconvparams.tostring(ref geoconvpois), baidulbstype.geoconv, encoding.utf8);
}
}