Return Class data

Question

Hi,

I have below class to get the current location:

public class GetCurrentLocation  
{  
    public async Task GetLocationDetails()  
    {  
        try  
        {  
            var request = new GeolocationRequest(GeolocationAccuracy.Best, TimeSpan.FromSeconds(10));  
  
            var location = await Geolocation.GetLastKnownLocationAsync();  
  
            if (location == null)  
            {  
                location = await Geolocation.GetLocationAsync(request);  
            }  
  
            if (location != null)  
            {  
                var placemarks = await Geocoding.GetPlacemarksAsync(location.Latitude, location.Longitude);  
                var placemark = placemarks?.FirstOrDefault();  
  
                if (placemark != null)  
                {  
                    RETURN location.Latitude;  
                    RETURN  location.Longitude;  
  
                    RETURN  placemark.CountryCode;  
                    RETURN  placemark.CountryName;  
                }  
            }  
        }  
        catch (Exception ex)  
        {  
            SentrySdk.CaptureException(ex);  
        }  
    }  
}  

How can I call this class in my app to get the RETURNed data in one line like this:

MyLocationData location = GetCurrentLocation();  

and then I can get individual details:

LabelCouuntryCode.Text = location.country_code;  
LabelCouuntryName.Text = location.country_name;  

Thanks,
Jassim

Answer 1

The following is done in a console app, only difference is I print out data to the console rather than set label text.

And since I don't have the code for geo location and the code for the catch I simply mocked things up.

The return type of GetLocationDetails is a named value tuple which we deconstruct by the caller.

internal class Program  
{  
    static async Task Main(string[] args)  
    {  
        var (latitude, longitude, countryCode, countryName, exception)   
            = await GetCurrentLocation.GetLocationDetails();  
  
        if (exception is null)  
        {  
            Console.WriteLine($"{latitude.Value}, {longitude}, {countryCode}, {countryName}");  
        }  
        else  
        {  
            Console.WriteLine(exception.Message);  
        }  
          
  
    }  
}  
  
public class GetCurrentLocation  
{  
    public static async Task<(decimal? latitude, decimal? longitude, string countryCode, string countryName, Exception exception)> GetLocationDetails()  
    {  
        try  
        {  
            await Task.Delay(0);  
            return (45.103760m, -123.984375m, "en", "usa", null);  
        }  
        catch (Exception ex)  
        {      
            return (null, null, null, null, ex);  
            throw;  
        }  
    }  
}  

Answer 2

I have below class to get the current location:

Yes, it's a class, but of type Task and a task don't return a result.
See Task Class => Remarks: The Task class represents a single operation that does not return a value