Bing Maps WPF control - update PushPin location using events on different thread

Question

I am creating an application using the Bing Mpas WPF control that needs to display a variable number of Pushpins. The number and identity of the Pushpins varyover time (data from a database or binding) and the location of each pushpin needs to be adjusted using information coming from a number of GPS streams running in a separate (background) scanning thread.

The changes in GPS data generate location update events, and I need the Pushpins to move accordingly. Unfortunately I cannot seem to get around the problem of cross-threading errors. I am using the MVVM design model. Any suggestions?

Answer 1

Try this:

...

this.MyMap.Dispatcher.Invoke(System.Windows.Threading.DispatcherPriority.Normal,

newAction( delegate()

{

Pushpinpin = newPushpin();

                pin.Location =

newLocation( latitude, longitude );

                pin.ToolTip = incident.Text511;

this.MyMap.Children.Add( pin );

              }

          ) );

Answer 2

Thanks steve - I have now used a slight variant of your suggestion, using the Dispatcher, and it works fine.

I now have multiple pushpins jumping all over the map in real time, just as planned!

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Sleepwalker