private void StartWatcher()
{
aqsFilterTextBox.IsEnabled = false;
startWatcherButton.IsEnabled = false;
resultCollection.Clear();
// Request some additional properties. In this saample, these extra properties are just used in the ResultsListViewTemplate.
// Take a look there in the XAML. Also look at the converter used by the XAML GeneralPropertyValueConverter. In general you just use
// DeviceInformation.Properties["<property name>"] to get a property. e.g. DeviceInformation.Properties["System.Devices.InterfaceClassGuid"].
string[] requestedProperties = new string[] {
"System.Devices.InterfaceClassGuid",
"System.ItemNameDisplay"
};
// Use AQS string filter from the text box
DeviceWatcher deviceWatcher = DeviceInformation.CreateWatcher(
aqsFilterTextBox.Text,
requestedProperties);
rootPage.NotifyUser("Starting Watcher...", NotifyType.StatusMessage);
deviceWatcherHelper.StartWatcher(deviceWatcher);
stopWatcherButton.IsEnabled = true;
stopWatcherButton.Focus(FocusState.Keyboard);
aqsFilterTextBox.IsEnabled = true;
}
private void StartWatcher()
{
startWatcherButton.IsEnabled = false;
resultCollection.Clear();
DeviceWatcher deviceWatcher;
// Get the device selector chosen by the UI then add additional constraints for devices that
// can be paired or are already paired.
DeviceSelectorInfo deviceSelectorInfo = (DeviceSelectorInfo)selectorComboBox.SelectedItem;
string selector = "(" + deviceSelectorInfo.Selector + ")" + " AND (System.Devices.Aep.CanPair:=System.StructuredQueryType.Boolean#True OR System.Devices.Aep.IsPaired:=System.StructuredQueryType.Boolean#True)";
if (deviceSelectorInfo.Kind == DeviceInformationKind.Unknown)
{
// Kind will be determined by the selector
deviceWatcher = DeviceInformation.CreateWatcher(
selector,
null // don't request additional properties for this sample
);
}
else
{
// Kind is specified in the selector info
deviceWatcher = DeviceInformation.CreateWatcher(
selector,
null, // don't request additional properties for this sample
deviceSelectorInfo.Kind);
}
rootPage.NotifyUser("Starting Watcher...", NotifyType.StatusMessage);
deviceWatcherHelper.StartWatcher(deviceWatcher);
stopWatcherButton.IsEnabled = true;
}
private void StartWatcher()
{
startWatcherButton.IsEnabled = false;
resultCollection.Clear();
// First get the device selector chosen by the UI.
DeviceSelectorInfo deviceSelectorInfo = (DeviceSelectorInfo)selectorComboBox.SelectedItem;
DeviceWatcher deviceWatcher;
if (null == deviceSelectorInfo.Selector)
{
// If the a pre-canned device class selector was chosen, call the DeviceClass overload
deviceWatcher = DeviceInformation.CreateWatcher(deviceSelectorInfo.DeviceClassSelector);
}
else if (deviceSelectorInfo.Kind == DeviceInformationKind.Unknown)
{
// Use AQS string selector from dynamic call to a device api's GetDeviceSelector call
// Kind will be determined by the selector
deviceWatcher = DeviceInformation.CreateWatcher(
deviceSelectorInfo.Selector,
null // don't request additional properties for this sample
);
}
else
{
// Kind is specified in the selector info
deviceWatcher = DeviceInformation.CreateWatcher(
deviceSelectorInfo.Selector,
null, // don't request additional properties for this sample
deviceSelectorInfo.Kind);
}
rootPage.NotifyUser("Starting Watcher...", NotifyType.StatusMessage);
deviceWatcherHelper.StartWatcher(deviceWatcher);
stopWatcherButton.IsEnabled = true;
}
private void StartWatchers()
{
startWatcherButton.IsEnabled = false;
resultCollection.Clear();
// Create a watcher for each DeviceInformationKind selected by the user
foreach (DeviceInformationKind deviceInfoKind in ((DeviceInformationKindChoice)kindComboBox.SelectedItem).DeviceInformationKinds)
{
DeviceWatcher deviceWatcher = DeviceInformation.CreateWatcher(
"", // AQS Filter string
null, // requested properties
deviceInfoKind);
DeviceWatcherHelper deviceWatcherHelper = new DeviceWatcherHelper(resultCollection, Dispatcher);
deviceWatcherHelper.UpdateStatus = false; // we will show our own status messages
deviceWatcherHelper.DeviceChanged += OnDeviceListChanged;
deviceWatcherHelpers.Add(deviceWatcherHelper);
deviceWatcherHelper.StartWatcher(deviceWatcher);
}
stopWatcherButton.IsEnabled = true;
stopWatcherButton.Focus(FocusState.Keyboard);
}