private async void ConnectToiRacer()
{
try
{
if (racerDeviceInfo != null)
{
//Get rid of the command provider
if (accelerometerCommandProvider != null)
accelerometerCommandProvider = null;
//Dispose of the Racer and destory it if it exists...
DestroyRacer();
//Create a new Racer...
//If running on the device, create real racer
//Otherwise, (running on the emulator) create a mock racer
if (Microsoft.Devices.Environment.DeviceType == DeviceType.Device)
this.Racer = new Racer();
//this.Racer = new Mock.MockRacer();
else
this.Racer = new Mock.MockRacer();
//Connect it to the selected device
await this.Racer.ConnectAsync(racerDeviceInfo);
//Assign the AccelerometerCommandProvider to control it
//this.Racer.CommandProvider = new AccelerometerCommandProvider();
accelerometerCommandProvider = new AccelerometerCommandProvider();
accelerometerCommandProvider.Racer = this.Racer;
}
}
catch (Exception ex)
{
string message = string.Format("An {0} occurred when trying to connect: {1}", ex.GetType().Name, ex.Message);
ShowMessage(message);
}
}
private void DestroyRacer()
{
//To prevent an infinite loop,
//make sure to work with the racer field, not the Racer property
if (this.racer != null)
{
//Unsubscribe from the RacerConnectionStateChanged event...
racer.RacerConnectionStateChanged -= OnRacerConnectionStateChanged;
Racer.Dispose();
this.racer = null;
//Get rid of the accelerometerCommandProvider;
accelerometerCommandProvider.Dispose();
accelerometerCommandProvider = null;
GoCommand.RaiseCanExecuteChanged();
DisconnectCommand.RaiseCanExecuteChanged();
}
}