/// <summary>
/// Contains property guid
/// </summary>
/// <param name="key">Looks for a specific key</param>
/// <returns>True if found</returns>
public bool Contains(PropertyKey key)
{
for (int i = 0; i < Count; i++)
{
PropertyKey other = Get(i);
if ((other.formatId == key.formatId) && (other.propertyId == key.propertyId))
{
return true;
}
}
return false;
}
void IMMNotificationClient.OnPropertyValueChanged(string deviceId, PropertyKey key)
{
InvokeOnSynchronizationContext(() =>
{
var handler = DevicePropertyChanged;
if (handler != null)
{
AudioDevice device = GetDevice(deviceId);
if (device == null)
return; // Device was already removed by the time I got here
handler(this, new AudioDeviceEventArgs(device));
}
});
}
internal PropertyStoreProperty(PropertyKey key, PropVariant value)
{
_key = key;
_value = value;
}
public bool TryGetValue(PropertyKey key, out object value)
{
value = null;
try
{
var property = this[key];
if (property == null || property.IsEmpty)
return false;
value = property.Value;
return true;
}
catch (COMException ex)
{
const int NoSuchHDevinst = unchecked((int)0xE000020B);
// Bad installation of driver
if (ex.HResult == NoSuchHDevinst)
{
return false;
}
throw;
}
}
/// <summary>
/// Indexer by guid
/// </summary>
/// <param name="key">Property Key</param>
/// <returns>Property or null if not found</returns>
public PropertyStoreProperty this[PropertyKey key]
{
get
{
PropVariant result;
for (int i = 0; i < Count; i++)
{
PropertyKey other = Get(i);
if ((other.formatId == key.formatId) && (other.propertyId == key.propertyId))
{
Marshal.ThrowExceptionForHR(_underlyingStore.GetValue(ref other, out result));
return new PropertyStoreProperty(other, result);
}
}
return null;
}
}
internal PropertyStoreProperty(PropertyKey key, PropVariant value)
{
_key = key;
_value = value;
}
