how to obtain more info from DeviceWatcher?

Question

Hi, 

from the DeviceWatcher class, there're events for added, updated, removed, etc, but how could I get more information out of it? Info like Model Name, device Name, connection, etc.

I couldn't get much out from parameters DeviceWatcher and DeviceInformationUpdate classes.

Currently, the only way I know to obtain those information is through using DeviceInformation class or PnpObject class with .FindAllAsync() or derived methods. 

string[] properties = { "System.ItemNameDisplay", "System.Devices.ModelName", "System.Devices.Connected" };
var containers = await PnpObject.FindAllAsync(PnpObjectType.DeviceContainer, properties);

however, it is inconvenient and wasteful to update the entire device list if I already know there is one device updated.

var results = await DeviceInformation.FindAllAsync();
foreach (var result in results)
    {
        try
          {
               Debug.WriteLine("device: {0}", result.Name.ToString());
               Debug.WriteLine("\t Id: {0}", result.Id.ToString());
               foreach (var prop in result.Properties)
                        Debug.WriteLine("\t key: {0}, value: {1}", prop.Key, prop.Value);
                }
        catch(Exception ex)
        {
        }
    }

Thanks!

---

Jerry

Answer 1

Jerry,

I will see if there is a way to update just one device.

Best Wishes - Eric

Answer 2

Jerry,

I am still researching this for you.

Best Wishes - Eric

Answer 3

Jerry,

This page shows how to use DeviceWatcher to print out device properties when an added event is received.

http://msdn.microsoft.com/en-us/library/windows/apps/hh465007.aspx

I also posted a second more detailed answer on your other thread.

Best Wishes - Eric