MapsUI 1.4.0 Xamarin differemce versions Newtonsoft.Json

Question

I am writing a app where you can show your location on the screen. Everything works fine but the map is just one pixel line high. Is there a solution for this?

  <Grid x:Name="MapGrid"
     HorizontalOptions="CenterAndExpand"/>
  <Grid>

This is the main cs code of my project, i dont get breaking errors just warnings about packages. My app will start just fine just showing just one pixel line of the map.

    using System;
    using System.ComponentModel;
    using Xamarin.Forms;
    using Xamarin.Essentials;
    using Mapsui.Utilities;
    using Mapsui.Projection;
    using System.Runtime.CompilerServices;
    using System.Threading.Tasks;
    private MapsuiView mapControl;
    
    public MainPage()
    {
        InitializeComponent();

        mapControl = new MapsuiView();
        mapControl.NativeMap.Layers.Add(OpenStreetMap.CreateTileLayer());
        MapGrid.Children.Add(mapControl);

        Device.StartTimer(TimeSpan.FromSeconds(2), () =>
         {
             GoToLocation();
             return true;
         });

        async void GoToLocation()
        {
            Location location = await getLocation();
            if (location != null)
            {
                var sphericalMercatorCoordinate = SphericalMercator.FromLonLat(location.Longitude, location.Latitude);
                mapControl.NativeMap.NavigateTo(sphericalMercatorCoordinate);
                mapControl.NativeMap.NavigateTo(mapControl.NativeMap.Resolutions[15]);
            }
        }
        async Task<Location> getLocation()
        {
            Location location = null;
            try
            {
                var request = new GeolocationRequest(GeolocationAccuracy.Best);
                location = await Geolocation.GetLocationAsync(request);

                if(location != null)
                {
                    Console.WriteLine($"Latitude: {location.Latitude}, " +
                        $"Longitude: {location.Longitude}, " +
                        $"Altitude: {location.Altitude}, " +
                        $"Accuracy: {location.Accuracy}"); 
                }
            }
            catch (FeatureNotSupportedException fnsEx)
            {
                Console.WriteLine(fnsEx.ToString());
            }
            catch (FeatureNotEnabledException fneEx)
            {
                Console.WriteLine(fneEx.ToString());
            }
            catch (PermissionException pEx)
            {
                Console.WriteLine(pEx.ToString());
            }
            catch (Exception ex)
            {
                Console.WriteLine("Overige fout: " + ex.ToString());
            }
            return location;
        }
    }
}
}

This is a class which i added because it wouldn't work otherwise.

using System;
using System.Collections.Generic;
using System.Text;

namespace mobile_83504_3
 {
   public class MapsuiView : Xamarin.Forms.View
    {
      public Mapsui.Map NativeMap { get; }
      protected internal MapsuiView()
    {
        NativeMap = new Mapsui.Map();
   }
  }
 }

I'm using MapsUI 1.4.0 and it's trying to connect to a Newtonsoft.Json 9.0.0 that coudn't be found. so it takes 9.0.1, i don't know if that is the error but that is one of the few warnings that i get. alongside with a .NET framework that might not be fully compatible.

If the version 1.4.0 doesn't compatible with the .net framework, try to update the package to Mapsui 2.0. And to use the Mapsui, it's not necessary to create a custom mapsui view. To use Mapsui in Xamarin.Forms, you could refer to this link.https://stackoverflow.com/questions/62130419/how-to-use-mapsui-2-0-1-with-xamarin-forms — Jarvan Zhang, Jun 26 '20 at 14:09

score 0 · Accepted Answer · answered Jun 26 '20 at 14:14

Everything works fine but the map is just one pixel line high. Is there a solution for this?

To use the Mapsui, it's not necessary to create a custom mapsui view. Add the declare line code to the xaml file, the view will be available.

Check the code:

<ContentPage
    ...
    xmlns:mapsui="clr-namespace:Mapsui.UI.Forms;assembly=Mapsui.UI.Forms">
    <StackLayout>
        <mapsui:MapView x:Name="mapView"
            VerticalOptions="FillAndExpand"
            HorizontalOptions="Fill"
            BackgroundColor="Gray" />
    </StackLayout>
</ContentPage>

How to use Mapsui 2.0.1 with Xamarin.Forms?

MapsUI 1.4.0 Xamarin differemce versions Newtonsoft.Json

1 Answers1