public static void AddAutomationPropertyChangedEventHandler(AutomationElement element, TreeScope scope, AutomationPropertyChangedEventHandler eventHandler, params AutomationProperty[] properties) { Utility.ValidateArgumentNonNull(element, "element"); Utility.ValidateArgumentNonNull(eventHandler, "eventHandler"); Utility.ValidateArgumentNonNull(properties, "properties"); if (properties.Length == 0) { throw new ArgumentException("AtLeastOnePropertyMustBeSpecified"); } int[] propertyIdArray = new int[properties.Length]; for (int i = 0; i < properties.Length; ++i) { Utility.ValidateArgumentNonNull(properties[i], "properties"); propertyIdArray[i] = properties[i].Id; } try { PropertyEventListener listener = new PropertyEventListener(AutomationElement.StructureChangedEvent, element, eventHandler); Factory.AddPropertyChangedEventHandler( element.NativeElement, (UIAutomationClient.TreeScope)scope, CacheRequest.CurrentNativeCacheRequest, listener, propertyIdArray); ClientEventList.Add(listener); } catch (System.Runtime.InteropServices.COMException e) { Exception newEx; if (Utility.ConvertException(e, out newEx)) { throw newEx; } else { throw; } } }
public static void RemoveAutomationPropertyChangedEventHandler(AutomationElement element, AutomationPropertyChangedEventHandler eventHandler) { Utility.ValidateArgumentNonNull(element, "element"); Utility.ValidateArgumentNonNull(eventHandler, "eventHandler"); try { PropertyEventListener listener = (PropertyEventListener)ClientEventList.Remove(AutomationElement.AutomationPropertyChangedEvent, element, eventHandler); Factory.RemovePropertyChangedEventHandler(element.NativeElement, listener); } catch (System.Runtime.InteropServices.COMException e) { Exception newEx; if (Utility.ConvertException(e, out newEx)) { throw newEx; } else { throw; } } }