// Handles the device discovery event
public void DeviceFound(object sender, IntPtr pDev)
{
// Marshal interface to the current thread
IUPnPDevice device = (IUPnPDevice)Marshal.GetObjectForIUnknown(pDev);
Debug.WriteLine("Found device: " + device.FriendlyName);
// Check if the device already in the list
// Devices are compared by UniqueDeviceName
foreach (ListViewItem item in lvDevices.Items)
{
if ((item.Tag as IUPnPDevice).UniqueDeviceName == device.UniqueDeviceName)
{
Debug.WriteLine("Already known");
return;
}
}
// Get device icon
// For simplicity we always ask for a 64x64 icon
string url;
Debug.WriteLine("Getting icon");
int ret = device.IconURL("image/png", 64, 64, 16, out url);
Image imgIcon = new Bitmap(64, 64);
if (ret == 0 && url != null)
{
imgIcon = GetIcon(url);
}
Debug.WriteLine("Adding");
il.Images.Add(imgIcon);
ListViewItem newItem = new ListViewItem(device.FriendlyName);
newItem.Tag = device;
newItem.ImageIndex = il.Images.Count - 1;
lvDevices.Items.Add(newItem);
_evtDeviceFound.Set();
}
/// <summary>
/// Gets the URL for an icon for this device.
/// </summary>
/// <param name="encodingFormat">The MIME type of the encoding format that is requested for the icon.</param>
/// <param name="sizeX">Specifies the width of the icon, in pixels. Standard values are 16, 32, or 48.</param>
/// <param name="sizeY">Specifies the height of the icon, in pixels. Standard values are 16, 32, or 48 pixels.</param>
/// <param name="bitDepth">Specifies the bit depth of the icon. Standard values are 8, 16, or 24.</param>
/// <returns>A string representing the URL for the icon.</returns>
/// <remarks>
/// An application can specify any values for lSizeX, lSizeY, and lBitDepth. However, there is no
/// guarantee that an icon exists with those specifications. If a matching icon does not exist,
/// the URL for the icon that most closely matches the size and bit depth specified is returned.
/// </remarks>
public string GetIconURL(string encodingFormat, int sizeX, int sizeY, int bitDepth)
{
return(COMDevice.IconURL(encodingFormat, sizeX, sizeY, bitDepth));
}
