How to get lat-long from address (string) using C#?

You can do it using Nuget Package GoogleMaps.LocationServices in C#.

Here is how to use it:

1. Install it using Nuget Package Manager Command
   

   Install-Package GoogleMaps.LocationServices?

   if you are using .NET 4.6 or below, instal older version like 1.2.0

2. Once installed use the below C# code
   

   public static void GetLatLongFromAddress(string address)
   {
       //replace APIKey your Google API Key here
       var locationService = new GoogleLocationService("APIKey");
       var point = locationService.GetLatLongFromAddress(address);
   
       var latitude = point.Latitude;
       var longitude = point.Longitude;
   
       // Save lat/long values to DB...
   }?

That's it, simple to use and get Lat-long from address.

With the helpf of above API, you can also convert lat-long into address using C#.

You can also use below code, by passing address and call URL.

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;
}

It will give you lat/long in C# datatable.