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"); }