זיהוי Lat, Long מכתובת string

 

1.       יש לפתוח מחלקה חדשה בשם MyPlace

 [Serializable]

    public class MyPlace

    {

        public int place_id
{ get; set; }

        public string licence
{ get; set; }

        public string osm_type
{ get; set; }

        public long osm_id {
get; set; }

        public float lat { get; set; }

        public float lon { get; set; }

        public string type { get; set; }

        public int
place_rank { get; set; }

        public float
importance { get; set; }

        public string
addresstype { get; set; }

        public string name { get; set; }

        public string
display_name { get; set; }

        public string[]
boundingbox { get; set; }

    }

 

2.       להוסיף שתי פעולות במחלקת השרות שלכם (Utils.cs / DBHelper.cs)

private static T
DownloadAndDeserializeJsonData<T>(string url) where T : new()

{

    using (var
webClient = new
WebClient())

    {

        var jsonData = string.Empty;

        try

        {

            webClient.Headers.Add(HttpRequestHeader.UserAgent, "/");

            jsonData =
webClient.DownloadString(url);

        }

        catch (Exception) { }

 

        return string.IsNullOrEmpty(jsonData)

                   ? new T()

                   :
JsonConvert.DeserializeObject<T>(jsonData);

    }

}

public static
List<MyPlace> getLatLongByAddress(string address, string city)

{

    List<MyPlace> data = new List<MyPlace>();

    try

    {

        string rootURL = "https://nominatim.openstreetmap.org/search?q=";

        string endUrl = "&format=json";

        string url;

        url = rootURL + address + "+" + city + endUrl;

        data =
DownloadAndDeserializeJsonData<List<MyPlace>>(url);

        if (data.Count == 0)

        {

            url = rootURL + city + "+ישראל" + endUrl;

            data = DownloadAndDeserializeJsonData<List<MyPlace>>(url);

        }

    }

    catch

    {

        // error

   }

   return data;

}

 

3.       הקריאה
והשימוש

 

 

private PointLatLng getLatLongByStringAddress(string address,string city)

 {

     List<MyPlace> data =
Utils.getLatLongByAddress(address, city);

     string latStr = "", lonStr = "";

     if (data != null
&& data.Count > 0)

     {

         List<MyPlace> tmp = data.Where(x
=> x.addresstype == "way").ToList();

         if (tmp.Count != 0)

         {

             latStr = tmp[0].lat.ToString();

             lonStr = tmp[0].lon.ToString();

         }

         else

         {

             latStr = data[0].lat.ToString();

             lonStr = data[0].lon.ToString();

         }

         txbLat.Text = latStr;

         txbLong.Text = lonStr;

     }

     else

     {

         txbLat.Text = "32.034034";

         txbLat.Text = "34.722760";

     }

     double lat = Convert.ToDouble(latStr);

     double lon = Convert.ToDouble(lonStr);

     PointLatLng p1 = new PointLatLng(lat, lon);

     return p1;

 }