C#封装百度Web服务API处理包含（Geocoding API，坐标转换API）

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);
}
}