private async void MidiDeviceSelected(object sender, SelectionChangedEventArgs e)
{
var selectedDevice = (MidiDeviceInfo)OutputDevicesList.SelectedItem;
if (selectedDevice != null)
{
_currentDevice?.Dispose();
_currentDevice = await MidiOutPort.FromIdAsync(selectedDevice.Id);
KeyboardKeys.IsEnabled = true;
}
}
// Called when app is suspending
private void Current_Suspending(object sender, Windows.ApplicationModel.SuspendingEventArgs e)
{
// Clean up out watchers
inputDeviceWatcher.StopWatcher();
inputDeviceWatcher = null;
outputDeviceWatcher.StopWatcher();
outputDeviceWatcher = null;
// Remove EventHandlers and try dispose of input & output ports
try
{
midiInPort.MessageReceived -= MidiInPort_MessageReceived;
midiInPort.Dispose();
midiInPort = null;
}
catch
{
}
try
{
midiOutPort.Dispose();
midiOutPort = null;
}
catch
{
}
}
public static uint midiOutClose(IntPtr hmo)
{
if (s_midiOutPort != null)
{
s_midiOutPort.Dispose();
}
s_midiOutPort = null;
return(MidiWinApi.MMSYSERR_NOERROR);
}
public void ResetMidiOutput()
{
try
{
if (midiOutPort != null)
{
midiOutPort.Dispose();
midiOutPort = null;
GC.Collect();
}
}
catch { }
}
public void TeardownWatchers()
{
inputDeviceWatcher.StopWatcher();
inputDeviceWatcher = null;
outputDeviceWatcher.StopWatcher();
outputDeviceWatcher = null;
midiInPort.MessageReceived -= MidiInPort_MessageReceived;
midiInPort.Dispose();
midiInPort = null;
midiOutPort.Dispose();
midiOutPort = null;
}
/// <summary>
/// Eventhandler to clean up the MIDI connection, when the app is suspended.
/// The object midiOutPort is disposed and set to null
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void App_Suspending(object sender, SuspendingEventArgs e)
{
try
{
// Dispose the Midi Output port
midiOutPort.Dispose();
// Set the midiOutPort to null
midiOutPort = null;
}
catch
{
// Do noting. A cleanup has already been made
}
}
private void CleanUp()
{
// <SnippetCleanUp>
inputDeviceWatcher.StopWatcher();
inputDeviceWatcher = null;
outputDeviceWatcher.StopWatcher();
outputDeviceWatcher = null;
midiInPort.MessageReceived -= MidiInPort_MessageReceived;
midiInPort.Dispose();
midiInPort = null;
midiOutPort.Dispose();
midiOutPort = null;
// </SnippetCleanUp>
}
public void Close()
{
port.Dispose();
}
