C＃ – 如何使用C＃查找纬度和经度

我在C＃中有一个WCF服务。

在服务呼叫客户端中发送城市名称。 我想将城市名称转换为纬度和经度，并在人口统计数据下存储在数据库中。

我打算使用Google API来实现上述function。

我从Google及其“服务帐户”类型获得了一个API密钥。

如何使用哪些API获取经度和纬度？

我是否需要安装某些SDK或任何REST服务？

Answer 1

如果您想使用Google Maps API查看其REST API，则无需安装Google Maps API即可发送请求

 http://maps.googleapis.com/maps/api/geocode/xml?address=1600+Amphitheatre+Parkway,+Mountain+View,+CA&sensor=true_or_false 

你会得到一个响应XML。

有关更多信息，请查看

https://developers.google.com/maps/documentation/geocoding/index#GeocodingRequests

Answer 2

您可以尝试NuGet包GoogleMaps.LocationServices ，或者只是旋转其源代码 。 它使用Google的REST API来获取给定地址的纬度/经度，反之亦然，而无需API密钥。

你这样使用它：

 public static void Main() { var address = "Stavanger, Norway"; var locationService = new GoogleLocationService(); var point = locationService.GetLatLongFromAddress(address); var latitude = point.Latitude; var longitude = point.Longitude; // Save lat/long values to DB... } 

Answer 3

您可以在特定url中传递地址..并且您在返回值dt（数据表）中获得纬度和经度

 string url = "http://maps.google.com/maps/api/geocode/xml?address=" + address+ "&sensor=false"; WebRequest request = WebRequest.Create(url); using (WebResponse response = (HttpWebResponse)request.GetResponse()) { using (StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8)) { DataSet dsResult = new DataSet(); dsResult.ReadXml(reader); DataTable dtCoordinates = new DataTable(); dtCoordinates.Columns.AddRange(new DataColumn[4] { new DataColumn("Id", typeof(int)), new DataColumn("Address", typeof(string)), new DataColumn("Latitude",typeof(string)), new DataColumn("Longitude",typeof(string)) }); foreach (DataRow row in dsResult.Tables["result"].Rows) { string geometry_id = dsResult.Tables["geometry"].Select("result_id = " + row["result_id"].ToString())[0]["geometry_id"].ToString(); DataRow location = dsResult.Tables["location"].Select("geometry_id = " + geometry_id)[0]; dtCoordinates.Rows.Add(row["result_id"], row["formatted_address"], location["lat"], location["lng"]); } } return dtCoordinates; } 

Answer 4

  /*Ready to use code : simple copy paste GetLatLong*/ public class AddressComponent { public string long_name { get; set; } public string short_name { get; set; } public List types { get; set; } } public class Northeast { public double lat { get; set; } public double lng { get; set; } } public class Southwest { public double lat { get; set; } public double lng { get; set; } } public class Bounds { public Northeast northeast { get; set; } public Southwest southwest { get; set; } } public class Location { public double lat { get; set; } public double lng { get; set; } } public class Northeast2 { public double lat { get; set; } public double lng { get; set; } } public class Southwest2 { public double lat { get; set; } public double lng { get; set; } } public class Viewport { public Northeast2 northeast { get; set; } public Southwest2 southwest { get; set; } } public class Geometry { public Bounds bounds { get; set; } public Location location { get; set; } public string location_type { get; set; } public Viewport viewport { get; set; } } public class Result { public List address_components { get; set; } public string formatted_address { get; set; } public Geometry geometry { get; set; } public string place_id { get; set; } public List types { get; set; } } public class RootObject { public List results { get; set; } public string status { get; set; } } public static RootObject GetLatLongByAddress(string address) { var root = new RootObject(); var url = string.Format( "http://maps.googleapis.com/maps/api/geocode/json?address={0}&sensor=true_or_false", address); var req = (HttpWebRequest)WebRequest.Create(url); var res = (HttpWebResponse)req.GetResponse(); using (var streamreader=new StreamReader(res.GetResponseStream())) { var result = streamreader.ReadToEnd(); if (!string.IsNullOrWhiteSpace(result)) { root = JsonConvert.DeserializeObject(result); } } return root; } /* Call This*/ var destination_latLong = GetLatLongByAddress(um.RouteDestination); var lattitude =Convert.ToString( destination_latLong.results[0].geometry.location.lat, CultureInfo.InvariantCulture); var longitude=Convert.ToString( destination_latLong.results[0].geometry.location.lng, CultureInfo.InvariantCulture);