Binding observable collection of custom markers

Thread ID:	Created:	Updated:	Platform:	Replies:
142101	Jan 18,2019 06:45 PM UTC	Jan 21,2019 06:41 AM UTC	Xamarin.Forms	2

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Tags: SfMaps

Rjuken Developments

Asked On January 18, 2019 06:50 PM UTC

Hello syncfusion team,

I'm trying to bind a collection of custom markers to the Markers property of the SfMaps.

But it throws me an error :

Binding: System.Collections.ObjectModel.ObservableCollection`1[Project.Core.Models.WeatherMarker] can not be converted to type 'System.Collections.ObjectModel.ObservableCollection`1[Syncfusion.SfMaps.XForms.MapMarker]'

Well, I don't understand because using the same marker class but w/o binding works. Is it bindable ?

Marker class is pretty simple :

public class WeatherMarker : MapMarker

{

public string LottieAnimation { get; set; }

}

private ObservableCollection _weatherMarkers;

public ObservableCollection WeatherMarkers

{

get => _weatherMarkers;

set => SetProperty(ref _weatherMarkers, value);

}

< maps:SfMaps x:Name="sfmap" EnablePanning="False" EnableZooming="False" BackgroundColor="Transparent" >

< maps:SfMaps.Layers >

< maps:ShapeFileLayer x:Name="ShapeLayer" Uri="FRA_adm0.shp" MarkerTemplate="{Binding MarkerDataTemplate}" Markers="{Binding WeatherMarkers}" >

< maps:ShapeFileLayer.ShapeSettings >

< maps:ShapeSetting ShapeFill="{StaticResource PrimaryColorOne}" ShapeStroke="white" ShapeStrokeThickness="2" >

< /maps:ShapeSetting >

< /maps:ShapeFileLayer.ShapeSettings >

< /maps:ShapeFileLayer >

< /maps:SfMaps.Layers >

< /maps:SfMaps >

Regards.

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Rjuken Developments

Replied On January 18, 2019 07:15 PM UTC

Okay so I found out what's going on.

I have to type my ObservableCollection to MapMarker and not WeatherMarker.

private ObservableCollection< MapMarker > _weatherMarkers;

public ObservableCollection< MapMarker > WeatherMarkers

{

get => _weatherMarkers;

set => SetProperty(ref _weatherMarkers, value);

}

Instead of :

private ObservableCollection< WeatherMarker > _weatherMarkers;

public ObservableCollection< WeatherMarker > WeatherMarkers

{

get => _weatherMarkers;

set => SetProperty(ref _weatherMarkers, value);

}

It should work with WeatherMarker as it derives from MapMarker. Anyway, working now.

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Padmini Ramamurthy [Syncfusion]

Replied On January 21, 2019 06:41 AM UTC

Hi Rjuken Developments,

Glad that you have resolved the issue and please get back to us anytime if you need any other assistance.

Regards,

Padmini R.

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Binding observable collection of custom markers

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