internal void AddBinding(PSVariable variable, EventInfo eventInfo, string queueName)
{
Guid bindindID = Guid.NewGuid();
lock (s_bindings)
{
s_bindings.Add(bindindID, new WeakReference(variable));
WriteDebug("Added PSVariable tracking entry.");
}
try
{
Delegate handler = PSEventHelper.BindEventSink(variable, eventInfo, bindindID, queueName);
WriteDebug("Event sink bound.");
PSEventBindingAttribute attr = new PSEventBindingAttribute(eventInfo.Name, handler, bindindID);
variable.Attributes.Add(attr);
WriteDebug("Added binding attribute to PSVariable.");
}
catch (Exception ex)
{
m_command.WriteWarning(String.Format("Error binding to {0} on {1}: {2}", eventInfo.Name, variable.Name, ex.Message));
s_bindings.Remove(bindindID);
WriteDebug("Removed PSVariable tracking entry.");
throw;
}
}
internal void RemoveBinding(PSVariable variable, string eventName)
{
// need for instead of foreach (need to modify collection)
for (int index = 0; index < variable.Attributes.Count; index++)
{
PSEventBindingAttribute bindingAttr = variable.Attributes[index] as PSEventBindingAttribute;
if (bindingAttr != null)
{
if (bindingAttr.EventName.Equals(eventName, StringComparison.OrdinalIgnoreCase))
{
PSEventHelper.UnbindEventSink(variable, eventName, bindingAttr.Handler);
WriteDebug("Unbound event sink from variable.");
variable.Attributes.Remove(bindingAttr);
WriteDebug("Removed binding attribute from PSVariable.");
// remove PSVariable tracker
lock (s_bindings)
{
s_bindings.Remove(bindingAttr.BindingID);
WriteDebug("Removed PSVariable tracking entry.");
}
}
}
}
}
private void UnhookEventHandler()
{
Debug.WriteLine("Enter: " + m_eventName, "PSEventBindingAttribute.UnhookEventHandler");
try
{
PSEventHelper.UnbindEventSinkFromTarget(m_initialTarget, m_eventName, m_handler);
string message = String.Format("Removed event handler for '{0}' from {1}", m_eventName, m_initialTarget.GetType());
Debug.WriteLine(message, "PSEventBindingAttribute.UnhookEventHandler");
}
catch (Exception ex)
{
Trace.WriteLine(ex, "PSEventBindingAttribute.UnhookEventHandler");
}
Debug.WriteLine("Exit: " + m_eventName, "PSEventBindingAttribute.UnhookEventHandler");
}