public void Disconnect()
{
if (this.connectionPoint != null && this.cookie != 0)
{
this.connectionPoint.Unadvise(cookie);
this.cookie = 0;
this.connectionPoint = null;
}
}
public ConnectionPointCookie(object source, object sink, Type eventInterface, bool throwException)
{
Exception ex = null;
if (source is NativeMethods.IConnectionPointContainer)
{
NativeMethods.IConnectionPointContainer cpc = (NativeMethods.IConnectionPointContainer)source;
try
{
Guid tmp = eventInterface.GUID;
cpc.FindConnectionPoint(ref tmp, out connectionPoint);
}
catch(Exception)
{
connectionPoint = null;
}
if (connectionPoint == null)
{
ex = new ArgumentException("The source object does not expose the " + eventInterface.Name + " event inteface");
}
else if (!eventInterface.IsInstanceOfType(sink))
{
ex = new InvalidCastException("The sink object does not implement the eventInterface");
}
else
{
try
{
connectionPoint.Advise(sink, out cookie);
}
catch
{
cookie = 0;
connectionPoint = null;
ex = new Exception("IConnectionPoint::Advise failed for event interface '" + eventInterface.Name + "'");
}
}
}
else
{
ex = new InvalidCastException("The source object does not expost IConnectionPointContainer");
}
if (throwException && (connectionPoint == null || cookie == 0))
{
if (ex == null)
{
throw new ArgumentException("Could not create connection point for event interface '" + eventInterface.Name + "'");
}
else
{
throw ex;
}
}
}
