How to get the coordinates of the center

Question

Hey there,

I try to create a usual Windows Form in C# that contains the Bing Maps. So far it works, it's no problem to look around the world and so on. But now I want to get the coordinates of the current center and display it in a label for example. In the interactive SDK I found the JavaScript function:

function getCenter()
      {
        var latlon = map.getCenter();
        alert('Lat/Long: ' + latlon.latitude +'/' + latlon.longitude);
      }

I guess that's it what I need. The problem is, how to call the map.getCenter() function from C# Code? Or can I get the information with a server request.

Looking forward your answers!

Answer 1

Which map control are you using? If you are targeting Windows Forms you should use the WPF control in a WPF Host Element as documented here: http://rbrundritt.wordpress.com/2012/01/05/using-bing-maps-in-winforms/ If you are using this approach then you can get the center information from the center property of the map: http://msdn.microsoft.com/en-us/library/microsoft.maps.mapcontrol.wpf.map_properties.aspx

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http://rbrundritt.wordpress.com

Answer 2

You can pass commands from WinForms to a hosted Javascript control via the Document.InvokeScript() method of the WebBrowser object - http://msdn.microsoft.com/en-us/library/be9zzz62.aspx

So, assuming webBrowser is your instance of the WebBrowser control, you'd call: webBrowser.Document.InvokeScript("getCenter");

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twitter: @alastaira blog: http://alastaira.wordpress.com/ | Pro Spatial with SQL Server 2012

Answer 3

Thank you very much. I will test it on Thursday and tell you if it worked!

Answer 4

On more Question. From where get I the Microsoft.Maps reference? I searched but didn't find anything. Can you help me?

Answer 5

Microsoft.Maps is the namespace for all the items in the AJAX v7 library http://ecn.dev.virtualearth.net/mapcontrol/mapcontrol.ashx?v=7.0

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twitter: @alastaira blog: http://alastaira.wordpress.com/ | Pro Spatial with SQL Server 2012

Answer 6

I tried it but when I try to compile the program it says "The name 'InitializeComponent' doesn't exist in the current context'.

I get this error in MapUserControl.xaml.cs

In MapUserControl.xaml I already can see the bing map, that means so far it works, but I can't compile it. But why I get this error? Went through the "How To" often now but didn't find the source of the error.

Edit: Fixed it! Was a problem with namespaces. But works now!

Edit2: Great! I can get the center property now. But how can I set that the mode of the map is from the beginning Aerial? Can't find the parameter and don't know how to set. Thank you

Edit3: Got it. It's:

Map.Mode = new AerialMode(true);

So, thank you very much, helped me a lot!