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Morten Nielsen 2020-01-19 18:36:14 -08:00
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docs/concepts/ArcGISRuntime.md
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# Creating a location provider for ArcGIS Runtime SDK
Below is an implementation for use with the [ArcGIS Runtime SDK for .NET](http://developers.arcgis.com/net). Use this location provider on the MapView's LocationDisplay to send it location data from your NMEA device to display your current location on a map.
**Usage:**
```csharp
NmeaParser.NmeaDevice device = new NmeaParser.NmeaFileDevice("NmeaSampleData.txt");
mapView.LocationDisplay.LocationProvider = new NmeaLocationProvider(device);
mapView.LocationDisplay.IsEnabled = true;
```
**NmeaLocationProvider.cs**
```csharp
using System;
using System.Threading.Tasks;
using Esri.ArcGISRuntime.Geometry;
using Esri.ArcGISRuntime.Location;
namespace NmeaParser.ArcGIS
{
public class NmeaLocationProvider : ILocationProvider
{
public event EventHandler<LocationInfo> LocationChanged;
private readonly NmeaParser.NmeaDevice device;
public NmeaLocationProvider(NmeaParser.NmeaDevice device)
{
this.device = device;
device.MessageReceived += device_MessageReceived;
}
void device_MessageReceived(object sender, NmeaParser.NmeaMessageReceivedEventArgs e)
{
var message = e.Message;
if (message is NmeaParser.Messages.Rmc rmc && rmc.Active)
{
LocationChanged?.Invoke(this, new LocationInfo()
{
Course = rmc.Course,
Speed = rmc.Speed,
Location = new MapPoint(rmc.Longitude, rmc.Latitude, SpatialReferences.Wgs84)
});
}
}
public Task StartAsync() => device.OpenAsync();
public Task StopAsync() => device.CloseAsync();
}
}
```