How do i switch from front to rear camera with combobx in windows 10 universal app

See more:

C#

Windows

WPF

UWP

I am developing windows application.I want to switch from Front Camera to Back Camera with a Combobox in Windows Universal App or in WPF.

I have coded something but I don't get where I made a mistake.

Here is my code:

What I have tried:

<combobox x:name="SettingsCamera" horizontalalignment="Stretch" grid.row="1" grid.column="0" margin="0,5" selectionchanged="SettingsCamera_SelectionChanged" xmlns:x="#unknown">

private async void InitializeCameraAsync()
{DeviceInformation device = FindCameraDeviceByPanelAsync(Windows.Devices.Enumeration.Panel desiredPanel);



var devices = await Windows.Devices.Enumeration.DeviceInformation.FindAllAsync(Windows.Devices.Enumeration.DeviceClass.VideoCapture);
SettingsCamera.Items.Clear();
//_deviceList = new List<windows.devices.enumeration.deviceinformation>();
// Add the devices to deviceList
if (devices.Count > 0)
{
for (var i = 0; i < devices.Count; i++)
{
// _deviceList.Add(devices[i]);
SettingsCamera.Items.Add(devices[i].Name);
}
}

else
{
Debug.WriteLine("No camera device is found ");
}
}

private async void SettingsCamera_SelectionChanged(object sender,SelectionChangedEventArgs e){
if (SettingsCamera.SelectedIndex == 0)
{

try
{
var allVideoDevices = await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture);
//SettingsMicrophone.Items.Clear();
var frontCamera = allVideoDevices.FirstOrDefault(d => d.EnclosureLocation.Panel == Windows.Devices.Enumeration.Panel.Front);


if (allVideoDevices.Count == 0)
{
SettingsCamera.Items.Add(frontCamera.Name);
}
}
catch (NullReferenceException)
{
//audioExist = false;
SettingsCamera.Items.Add("No michrophone on your system");
}




}
else if (SettingsCamera.SelectedIndex == 1 && SettingsCamera.SelectedIndex == 2 && SettingsCamera.SelectedIndex == 3)
{

try
{
var allVideoDevices = await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture);
var backCamera = allVideoDevices.FirstOrDefault(d => d.EnclosureLocation.Panel == Windows.Devices.Enumeration.Panel.Front);
//SettingsMicrophone.Items.Clear();
if (allVideoDevices.Count >=2)
{
SettingsCamera.Items.Add(backCamera.Name);
}
SettingsCamera.Items.Add(backCamera.Name);

//make first cam default
}
catch (NullReferenceException)
{
//audioExist = false;
SettingsCamera.Items.Add("No michrophone on your system");
}

}


}