/// <summary> /// Refresh the property and patterns with Live data. /// it also set the Glimpse /// the update is done via caching to improve performance. /// </summary> /// <param name="useProperties">default is false to refresh it from UIElement directly</param> private static void PopulatePropertiesAndPatternsFromCache(this A11yElement element) { try { // Get the list of properties to retrieve A11yAutomation.UIAutomationObject.PollForPotentialSupportedProperties((IUIAutomationElement)element.PlatformObject, out int[] ppids, out string[] ppns); var ppl = new List <Tuple <int, string> >(); for (int i = 0; i < ppids.Length; i++) { var id = (int)ppids.GetValue(i); var name = (string)ppns.GetValue(i); if (DesktopElement.IsExcludedProperty(id, name) == false) { ppl.Add(new Tuple <int, string>(id, name)); } } A11yAutomation.UIAutomationObject.PollForPotentialSupportedPatterns((IUIAutomationElement)element.PlatformObject, out int[] ptids, out string[] ptns); var ptl = new List <Tuple <int, string> >(); for (int i = 0; i < ptids.Length; i++) { ptl.Add(new Tuple <int, string>((int)ptids.GetValue(i), (string)ptns.GetValue(i))); } var pplist = (from pp in ppl select pp.Item1).ToList(); var ptlist = (from pt in ptl select pt.Item1).ToList(); // build a cache based on the lists var cache = DesktopElementHelper.BuildCacheRequest(pplist, ptlist); // buildupdate cached element var uia = ((IUIAutomationElement)element.PlatformObject).BuildUpdatedCache(cache); // retrieve properties from cache var ps = (from pp in ppl//.AsParallel() let val = GetPropertyValueFromCache(uia, pp.Item1) where val != null select new A11yProperty(pp.Item1, val, pp.Item2)); element.Properties = ps.Where(p => !string.IsNullOrEmpty(p.TextValue)).ToDictionary(d => d.Id); element.UpdateGlimpse(); element.InitClickablePointProperty(uia); // retrieve patterns from cache var ptlst = from pt in ptl let pi = A11yPatternFactory.GetPatternInstance(element, uia, pt.Item1, pt.Item2) where pi != null select pi; element.Patterns = ptlst.ToList(); // release previous UIAElement Marshal.ReleaseComObject(uia); // release cache interface. Marshal.ReleaseComObject(cache); ppl.Clear(); ptl.Clear(); } #pragma warning disable CA1031 // Do not catch general exception types catch (Exception e) { e.ReportException(); } #pragma warning restore CA1031 // Do not catch general exception types }