[MonoTouch] Issue with MKMapView selected annotations

[Geoff Norton]

Chris,

   I'm pretty sure I know what the issue here is, but could you file a  
bug with a testcase so I can confirm and get it fixed?

Thanks

Geoff

On 6-Nov-09, at 10:26 PM, Chris Bailey wrote:

> I am continuing to have an issue that I am wondering if anyone has  
> an idea about.  In my code, I would like to obtain the coordinates  
> of the current selected annotation from MKMapView.  To do this, I  
> have attempted:
>
> CLLocationCoordinate2D desiredlocation =  
> mapView.SelectedAnnotations.First().Coordinate;
>
> With this code, everything compiles OK, however, I always get a  
> cannot cast from source to destination type error.
>
> Unhandled Exception: System.InvalidCastException: Cannot cast from  
> source type to destination type.
>   at (wrapper managed-to-native)  
> object:__icall_wrapper_mono_object_castclass (object,intptr)
>   at MonoTouch.Foundation.NSArray.ArrayFromHandle[MKAnnotation]  
> (IntPtr handle) [0x00000]
>   at MonoTouch.MapKit.MKMapView.get_SelectedAnnotations () [0x00000]
>   at Martini.AppDelegate+MapViewDelegate 
> +<GetViewForAnnotation>c__AnonStorey1.<>m__6 (System.Object ,  
> System.EventArgs ) [0x00000]
>   at MonoTouch.UIKit.UIControlEventProxy.Activated () [0x00000]
>   at (wrapper managed-to-native)  
> MonoTouch.UIKit.UIApplication:UIApplicationMain  
> (int,string[],intptr,intptr)
>   at MonoTouch.UIKit.UIApplication.Main (System.String[] args,  
> System.String principalClassName, System.String delegateClassName)  
> [0x00000]
>   at MonoTouch.UIKit.UIApplication.Main (System.String[] args)  
> [0x00000]
>   at Martini.Application.Main (System.String[] args) [0x00000]
>
> Does anyone have an idea how to accomplish what I am desiring?
>
> Monotouch 1.2 with latest MonoDevelop.
>
> Thanks!
> Chris
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