AutomationFocusChangedEvent

AutomationFocusChangedEvent

• SoftLead

  Hello Thomas,

  Adding a reference to UIAutomationClientSideProviders.dll didn't help.

  I still can get AutomationFocusChangedEvent only for Automation elements that have NativeWindowHandle != 0.

  Any idea

  Thanks,

  Vlad

  
  

• Maelia

  Hello Thomas,

  Please see the sample below.
  Thanks,
  Vlad.

  Referenced assemblies:

  UIAutomationClient v3.0.51116.0
  UIAutomationClientsideProviders 3.0.51116.0
  UIAutomationTypes 3.0.51116.0
  WindowsBase 3.0.51116.0
  System 2.0.0.0

  using System;
  using System.Collections.Generic;
  using System.Text;
  using System.Windows.Automation;
  using System.IO;

  namespace FocusApp
  {
  class Program
  {
  private AutomationFocusChangedEventHandler _h;
  private AutomationElement _lastFocused = null;
  public Program()
  {
  _h = new AutomationFocusChangedEventHandler(OnFocus);
  }
  static void Main(string[] args)
  {
  Program _instanse = new Program();
  _instanse.Listen();
  }
  public void Listen()
  {
  Automation.AddAutomationFocusChangedEventHandler(_h);
  while(true)
  {
  System.Threading.Thread.Sleep(500);
  AutomationElement el = null;
  try
  {
  el = AutomationElement.FocusedElement;
  }
  // An ArgumentException ("hwnd cannot be IntPtr.Zero or null.")
  // will be thrown if focus belongs to some System.Windows.Controls.Control
  catch(Exception e)
  {
  Console.WriteLine("AutomationElement.FocusedElement throwed Exception: {0}", e.Message);
  }
  if (el == null)
  continue;
  if (el.Equals(_lastFocused))
  continue;
  _lastFocused = el;
  Console.WriteLine("Focused Element: Id = {0}; Name = {1}, FrameworkId = {2}",el.Current.AutomationId, el.Current.Name, el.Current.FrameworkId);
  }//while
  }
  // This method is never called if focus passed to some
  // System.Windows.Controls.Control.

  protected void OnFocus(object sender, AutomationFocusChangedEventArgs arg)
  {
  AutomationElement el = sender as AutomationElement;
  Console.WriteLine("Focus changed. Id = {0}; Name = {1}, FrameworkId = {2}",el.Current.AutomationId, el.Current.Name, el.Current.FrameworkId);
  }

  }
  }

  
  

• RicardoJB

  Hello Vlad! I believe you may need to add a reference to UIAutomationClientSideProviders.dll in your project. Basically without that dll you will not get support for Win32/WinForms controls. Can you let me know if that assists with your issue

  Thomas

  
  
  

• AbhimanyuSirohi

  Do you mind posting the code sample you use with the AutomationFocusChangedEvent

  Thanks,

  Thomas

  
  
  

• MSFT Johan Stenberg

  Hello Vlad I ran your code against a newer build and it works correctly. Unfortunately the WPF controls in the February CTP were not raising FocusChanged event so this is why you are not seeing support.

  I am working to find out when we can get the new CTP out to you all. As soon as it is available I will let you all know. When it is available this issue will be solved.

  
  
  
• AutomationFocusChangedEvent