Location demonstrates how to use the MapControl
Step 1
If not already, follow Setup and Start on how to Install and get Started with Visual Studio 2017 or in Windows 10 choose Start, and then from the Start Menu find and select Visual Studio 2017.
Step 2
Once Visual Studio Community 2017 has started, from the Menu choose File, then New then Project…
Step 3
From New Project choose Visual C# from Installed, Templates then choose Blank App (Universal Windows) and then type in a Name and select a Location and then select Ok to create the Project
Step 4
Then in New Universal Windows Project you need to select the Target Version this should be at least the Windows 10 Fall Creators Update (10.0; Build 16299) and the Minimum Version to be the same.
The Target Version will control what features your application can use in Windows 10 so by picking the most recent version you’ll be able to take advantage of those features. To make sure you always have the most recent version, in Visual Studio 2017 select Tools Extensions and Updates… then and then see if there are any Updates
Step 5
Once done select from the Menu, Project, then Add New Item…
Step 6
From the Add New Item window select Visual C#, then Code from Installed then select Code File from the list, then type in the Name as Library.cs before selecting Add to add the file to the Project
Step 7
Once in the Code View for Library.cs the following should be entered:
using System; using System.Threading.Tasks; using Windows.Devices.Geolocation; using Windows.UI; using Windows.UI.Xaml; using Windows.UI.Xaml.Controls; using Windows.UI.Xaml.Media; using Windows.UI.Xaml.Shapes; public class Library { public async Task<Geopoint> Position() { return (await new Geolocator().GetGeopositionAsync()).Coordinate.Point; } public UIElement Marker() { Canvas marker = new Canvas(); Ellipse outer = new Ellipse() { Width = 25, Height = 25, Margin = new Thickness(-12.5, -12.5, 0, 0), Fill = new SolidColorBrush(Color.FromArgb(255, 240, 240, 240)) }; Ellipse inner = new Ellipse() { Width = 20, Height = 20, Margin = new Thickness(-10, -10, 0, 0), Fill = new SolidColorBrush(Colors.Black) }; Ellipse core = new Ellipse() { Width = 10, Height = 10, Margin = new Thickness(-5, -5, 0, 0), Fill = new SolidColorBrush(Colors.White) }; marker.Children.Add(outer); marker.Children.Add(inner); marker.Children.Add(core); return marker; } }
In the Library.cs there are using statements to include the necessary functionality. The Position Method is used to get the current position using Geolocator and Marker is a series of Ellipse elements which will make up shape to appear on the MapControl
Step 8
In the Solution Explorer select MainPage.xaml
Step 9
From the Menu choose View and then Designer
Step 10
The Design View will be displayed along with the XAML View and in this between the Grid and /Grid elements, enter the following XAML:
<Grid xmlns:map="using:Windows.UI.Xaml.Controls.Maps"> <map:MapControl Name="Display"/> </Grid> <CommandBar VerticalAlignment="Bottom"> <AppBarButton Icon="Map" Label="Location" Click="Location_Click"/> </CommandBar>
The first block of XAML the main user interface of the Application, this features a Grid with a MapControl to show a Map. The second block of XAML is the CommandBar which contains the Location option to show the current position on the Map.
Step 11
From the Menu choose View and then Code
Step 12
Once in the Code View, below the end of public MainPage() { … } the following Code should be entered:
Library library = new Library(); private async void Location_Click(object sender, RoutedEventArgs e) { Windows.Devices.Geolocation.Geopoint position = await library.Position(); DependencyObject marker = library.Marker(); Display.Children.Add(marker); Windows.UI.Xaml.Controls.Maps.MapControl.SetLocation(marker, position); Windows.UI.Xaml.Controls.Maps.MapControl.SetNormalizedAnchorPoint(marker, new Point(0.5, 0.5)); Display.ZoomLevel = 12; Display.Center = position; }
Below the MainPage() Method an instance of the Library Class is created. The Location_Click Method handles the obtaining of a Geopoint location, then the Marker is created and added to the MapControl in the relevant location, the Map itself is centred in the MapControl.
Step 13
In the Solution Explorer select Package.appxmanifest
Step 14
From the Menu choose View and then Designer
Step 15
Finally in the Package.appxmanifest select Capabilities and then make sure the Location option is checked
Step 16
That completes the Universal Windows Platform Application so Save the Project then in Visual Studio select the Local Machine to run the Application
Step 17
After the Application has started running if your Local Machine has access to Location you can then select the Location button, it will then ask to let the application access your precise location and if it can will display your current position
Step 18
To Exit the Application select the Close button in the top right of the Application